Updated on 2024/05/17

写真a

 
TAMURA Yoichi
 
Organization
Graduate School of Science Professor
Graduate School
Graduate School of Science
Undergraduate School
School of Science Department of Physics
Title
Professor
Contact information
メールアドレス
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Degree 1

  1. 博士(理学) ( 2009.3   東京大学 ) 

Research Interests 5

  1. Radio astronomy

  2. Extragalactic astronomy

  3. Astronomical instrumentation

  4. Observational cosmology

  5. Interstellar physics

Research Areas 2

  1. Natural Science / Astronomy  / Radio astronomy

  2. Natural Science / Astronomy

Current Research Project and SDGs 1

  1. Astronomy

Research History 6

  1. Nagoya University   Graduate School of Science   Professor

    2022.12

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    Country:Japan

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  2. Astronomical Society of Japan   Board member

    2019.6 - 2021.6

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  3. Nagoya University   Graduate School of Science Division of Particle and Astrophysical Sciences Interstellar Physics   Associate professor

    2017.4 - 2022.11

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  4. The University of Tokyo   Institute of Astronomy   Assistant Professor

    2011.2 - 2017.3

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  5. National Astronomical Observatory of Japan   Nobeyama Radio Observatory   Researcher

    2009.4 - 2011.1

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    Country:Japan

  6. Japan Society for Promotion of Science   Research Fellow (DC1)

    2006.4 - 2009.3

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Education 3

  1. The University of Tokyo   Graduate School, Division of Science   Department of Astronomy

    2006.4 - 2009.3

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    Country: Japan

  2. The University of Tokyo   Graduate School, Division of Science

    2004.4 - 2006.3

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    Country: Japan

  3. Waseda University   Faculty of Science and Engineering

    2000.4 - 2004.3

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    Country: Japan

Professional Memberships 2

  1. International Astronomical Union

    2015.9

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  2. Astronomical Society of Japan

    2004

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Committee Memberships 15

  1. National Astronomical Observatory   External Evaluation Committee of Nobeyama Astronomical Observatory, NAOJ  

    2023.11   

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  2. 日本天文学会   推薦委員会 委員  

    2023.6   

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    Committee type:Academic society

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  3.   ALMA-Japan/East Asia Science Advisory Committee  

    2022.9   

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    Committee type:Academic society

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  4. 宇宙電波懇談会   運営委員会 委員  

    2022.3   

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    Committee type:Academic society

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  5. 日本天文学会   ネットワーク委員会 委員  

    2021.6   

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    Committee type:Academic society

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  6. 自然科学研究機構 国立天文台   TMT科学諮問委員会  

    2020.9   

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    Committee type:Other

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  7. 日本天文学会   ネットワーク委員会 委員長  

    2019.6 - 2021.6   

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  8. 自然科学研究機構 国立天文台   ミリ波サブミリ波天文プログラム小委員会 委員長  

    2018.9 - 2020.8   

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    Committee type:Other

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  9. 宇宙航空研究開発機構宇宙科学研究所   次世代赤外線天文衛星(SPICA)国内研究推進委員会 委員  

    2018.8 - 2020.7   

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    Committee type:Other

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  10. 日本学術会議   電気電子工学委員会URSI分科会電波天文学小委員会 委員  

    2018.4 - 2020.9   

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  11. 自然科学研究機構 国立天文台   すばる望遠鏡プログラム小委員会 委員  

    2017.8 - 2021.8   

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    Committee type:Other

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  12. 自然科学研究機構 国立天文台   ミリ波サブミリ波天文プログラム小委員会 委員  

    2017.4 - 2018.6   

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  13. 宇宙電波懇談会   運営委員会 委員  

    2016.4 - 2020.3   

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  14. 自然科学研究機構 国立天文台   野辺山宇宙電波観測所プログラム小委員会 委員  

    2015.4 - 2016.6   

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    Committee type:Other

  15. 日本天文学会   ネットワーク委員会 委員  

    2013 - 2016   

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    Committee type:Other

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Awards 2

  1. PASJ Excellent Paper Award

    2022.3   Astronomical Society of Japan   Big Three Dragons: A z = 7.15 Lyman-break galaxy detected in [O III] 88 μm, [C II] 158 μm, and dust continuum with ALMA

    Takuya Hashimoto, Akio K. Inoue, Ken Mawatari, Yoichi Tamura, Hiroshi Matsuo, Hisanori Furusawa, Yuichi Harikane, Takatoshi Shibuya, Kirsten K. Knudsen, Kotaro Kohno, Yoshiaki Ono, Erik Zackrisson, Takashi Okamoto, Nobunari Kashikawa, Pascal A. Oesch, Masami Ouchi, Kazuaki Ota, Ikkoh Shimizu, Yoshiaki Taniguchi, Hideki Umehata, Darach Watson

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  2. PASJ Excellent Paper Award

    2020.3   Astronomical Society of Japan   Kilonova from Post-Merger Ejecta as an Optical and Near-Infrared Counterpart of GW170817

    Masaomi TANAKA, Yousuke UTSUMI, Paolo A. MAZZALI, Nozomu TOMINAGA, Michitoshi YOSHIDA, Yuichiro SEKIGUCHI, Tomoki MOROKUMA, Kentaro MOTOHARA, Kouji OHTA, Koji S. KAWABATA, Fumio ABE, Kentaro AOKI, Yuichiro ASAKURA, Stefan BAAR, Sudhanshu BARWAY, Ian A. BOND, Mamoru DOI, Takuya FUJIYOSHI, Hisanori FURUSAWA, Satoshi HONDA, Yoichi ITOH, Miho KAWABATA, Nobuyuki KAWAI, Ji Hoon KIM, Chien-Hsiu LEE, Shota MIYAZAKI, Kumiko MORIHANA, Hiroki NAGASHIMA, Takahiro NAGAYAMA, Tatsuya NAKAOKA, Fumiaki NAKATA, Ryou OHSAWA, Tomohito OHSHIMA, Hirofumi OKITA, Tomoki SAITO, Takahiro SUMI, Akito TAJITSU, Jun TAKAHASHI, Masaki TAKAYAMA, Yoichi TAMURA, Ichi TANAKA, Paul J. TRISTRAM, Tsuyoshi TERAI, Naoki YASUDA, Tetsuya ZENK

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Papers 130

  1. JWST and ALMA Multiple-line Study in and around a Galaxy at <i>z</i>=8.496: Optical to Far-Infrared Line Ratios and the Onset of an Outflow Promoting Ionizing Photon Escape

    Fujimoto, S; Ouchi, M; Nakajima, K; Harikane, Y; Isobe, Y; Brammer, G; Oguri, M; Giménez-Arteaga, C; Heintz, KE; Kokorev, V; Bauer, FE; Ferrara, A; Kojima, T; Lagos, CD; Laura, S; Schaerer, D; Shimasaku, K; Hatsukade, B; Kohno, K; Sun, FW; Valentino, F; Watson, D; Fudamoto, Y; Inoue, AK; González-López, J; Koekemoer, AM; Knudsen, K; Lee, MM; Magdis, GE; Richard, J; Strait, VB; Sugahara, Y; Tamura, Y; Toft, S; Umehata, H; Walth, G

    ASTROPHYSICAL JOURNAL   Vol. 964 ( 2 )   2024.4

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.3847/1538-4357/ad235c

    Web of Science

  2. Molecular Outflow in the Reionization-epoch Quasar J2054-0005 Revealed by OH 119 <i>μ</i>m Observations

    Salak, D; Hashimoto, T; Inoue, AK; Bakx, TJLC; Donevski, D; Tamura, Y; Sugahara, Y; Kuno, N; Miyamoto, Y; Fujimoto, S; Suphapolthaworn, S

    ASTROPHYSICAL JOURNAL   Vol. 962 ( 1 )   2024.2

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Astrophysical Journal  

    Molecular outflows are expected to play a key role in galaxy evolution at high redshift. To study the impact of outflows on star formation at the epoch of reionization, we performed sensitive Atacama Large Millimeter/submillimeter Array observations of OH 119 μm toward J2054-0005, a luminous quasar at z = 6.04. The OH line is detected and exhibits a P-Cygni profile that can be fitted with a broad blueshifted absorption component, providing unambiguous evidence of an outflow, and an emission component at near-systemic velocity. The mean and terminal outflow velocities are estimated to be v out ≈ 670 and 1500 km s−1, respectively, making the molecular outflow in this quasar one of the fastest at the epoch of reionization. The OH line is marginally spatially resolved for the first time in a quasar at z > 6, revealing that the outflow extends over the central 2 kpc region. The mass outflow rate is comparable to the star formation rate ( M ̇ out / SFR ∼ 2 ), indicating rapid (∼107 yr) quenching of star formation. The mass outflow rate in a sample of star-forming galaxies and quasars at 4 < z < 6.4 exhibits a positive correlation with the total infrared luminosity, although the scatter is large. Owing to the high outflow velocity, a large fraction (up to ∼50%) of the outflowing molecular gas may be able to escape from the host galaxy into the intergalactic medium.

    DOI: 10.3847/1538-4357/ad0df5

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  3. The Extended [C <sc>ii</sc>] under Construction? Observation of the Brightest High-<i>z</i> Lensed Star-forming Galaxy at <i>z</i>=6.2

    Fudamoto, Y; Inoue, AK; Coe, D; Welch, B; Acebron, A; Ricotti, M; Mandelker, N; Windhorst, RA; Xu, XF; Sugahara, Y; Bauer, FE; Bradac, M; Bradley, LD; Diego, JM; Florian, M; Frye, B; Fujimoto, S; Hashimoto, T; Henry, A; Mahler, G; Oesch, PA; Ravindranath, S; Rigby, J; Sharon, K; Strait, V; Tamura, Y; Trenti, M; Vanzella, E; Zackrisson, E; Zitrin, A

    ASTROPHYSICAL JOURNAL   Vol. 961 ( 1 )   2024.1

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Astrophysical Journal  

    We present results of [C II] 158 μm emission line observations, and report the spectroscopic redshift confirmation of a strongly lensed (μ ∼ 20) star-forming galaxy, MACS0308-zD1 at z = 6.2078 ± 0.0002. The [C II] emission line is detected with a signal-to-noise ratio >6 within the rest-frame UV-bright clump of the lensed galaxy (zD1.1) and exhibits multiple velocity components; the narrow [C II] has a velocity full width half maximum (FWHM) of 110 ± 20 km s−1, while broader [C II] is seen with an FWHM of 230 ± 50 km s−1. The broader [C II] component is blueshifted (−80 ± 20 km s−1) with respect to the narrow [C II] component, and has a morphology that extends beyond the UV-bright clump. We find that, while the narrow [C II] emission is most likely associated with zD1.1, the broader component is possibly associated with a physically distinct gas component from zD1.1 (e.g., outflowing or inflowing gas). Based on the nondetection of λ158μm dust continuum, we find that MACS0308-zDl's star formation activity occurs in a dust-free environment indicated by a strong upper limit of infrared luminosity ≲9 × 108 Le. Targeting this strongly lensed faint galaxy for follow-up Atacama Large Millimeter/submillimeter Array and JWST observations will be crucial to characterize the details of typical galaxy growth in the early Universe.

    DOI: 10.3847/1538-4357/ad0f95

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  4. J0107a: A Barred Spiral Dusty Star-forming Galaxy at <i>z</i>=2.467

    Huang, S; Kawabe, R; Kohno, K; Saito, T; Mizukoshi, S; Iono, D; Michiyama, T; Tamura, Y; Hayward, CC; Umehata, H

    ASTROPHYSICAL JOURNAL LETTERS   Vol. 958 ( 2 )   2023.12

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Astrophysical Journal Letters  

    Dusty star-forming galaxies (DSFGs) are among the most massive and active star-forming galaxies during the cosmic noon. Theoretical studies have proposed various formation mechanisms of DSFGs, including major merger-driven starbursts and secular star-forming disks. Here, we report J0107a, a bright (∼8 mJy at observed-frame 888 μm) DSFG at z = 2.467 that appears to be a gas-rich massive disk and might be an extreme case of the secular disk scenario. J0107a has a stellar mass M ⋆ ∼ 5 × 1011 M ⊙, molecular gas mass M mol ≳ 1011 M ⊙, and a star formation rate of ∼500M ⊙ yr−1. J0107a does not have a gas-rich companion. The rest-frame 1.28 μm JWST NIRCam image of J0107a shows a grand-design spiral with a prominent stellar bar extending ∼15 kpc. The Atacama Large Millimeter/submillimeter Array Band 7 continuum map reveals that the dust emission originates from both the central starburst and the stellar bar. 3D disk modeling of the CO(4-3) emission line indicates a dynamically cold disk with rotation-to-dispersion ratio V max / σ ∼ 8 . The results suggest a bright DSFG may have a nonmerger origin, and its vigorous star formation may be triggered by the bar and/or rapid gas inflow.

    DOI: 10.3847/2041-8213/acff63

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  5. The SSA22 H i Tomography Survey (SSA22-HIT). I. Data Set and Compiled Redshift Catalog

    Mawatari, K; Inoue, AK; Yamada, T; Hayashino, T; Prochaska, JX; Lee, KG; Tejos, N; Kashikawa, N; Otsuka, T; Yamanaka, S; Schlegel, DJ; Matsuda, Y; Hennawi, JF; Iwata, I; Umehata, H; Mukae, S; Ouchi, M; Sugahara, Y; Tamura, Y

    ASTRONOMICAL JOURNAL   Vol. 165 ( 5 )   2023.5

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Astronomical Journal  

    We conducted a deep spectroscopic survey, named SSA22-HIT, in the SSA22 field with the DEep Imaging MultiObject Spectrograph (DEIMOS) on the Keck telescope, designed to tomographically map high-z H i gas through analysis of Lyα absorption in background galaxies’ spectra. In total, 198 galaxies were spectroscopically confirmed at 2.5 < z < 6 with a few low-z exceptions in the 26 × 15 arcmin2 area, of which 148 were newly determined in this study. Our redshift measurements were merged with previously confirmed redshifts available in the 34 × 27 arcmin2 area of the SSA22 field. This compiled catalog containing 730 galaxies of various types at z > 2 is useful for various applications, and it is made publicly available. Our SSA22-HIT survey has increased by approximately twice the number of spectroscopic redshifts of sources at z > 3.2 in the observed field. From a comparison with publicly available redshift catalogs, we show that our compiled redshift catalog in the SSA22 field is comparable to those among major extragalactic survey fields in terms of a combination of wide area and high surface number density of objects at z > 2. About 40% of the spectroscopically confirmed objects in SSA22-HIT show reasonable quality of spectra in the wavelengths shorter than Lyα when a sufficient amount of smoothing is adopted. Our data set enables us to make the H i tomographic map at z ≳ 3, which we present in a parallel study.

    DOI: 10.3847/1538-3881/acb707

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  6. The bright extragalactic ALMA redshift survey (BEARS) - II. Millimetre photometry of gravitational lens candidates

    Bendo, GJ; Urquhart, SA; Serjeant, S; Bakx, T; Hagimoto, M; Cox, P; Neri, R; Lehnert, MD; Dannerbauer, H; Amvrosiadis, A; Andreani, P; Baker, AJ; Beelen, A; Berta, S; Borsato, E; Buat, V; Butler, KM; Cooray, A; De Zotti, G; Dunne, L; Dye, S; Eales, S; Enia, A; Fan, L; Gavazzi, R; González-Nuevo, J; Harris, AI; Herrera, CN; Hughes, DH; Ismail, D; Jones, BM; Kohno, K; Krips, M; Lagache, G; Marchetti, L; Massardi, M; Messias, H; Negrello, M; Omont, A; Perez-Fournon, I; Riechers, DA; Scott, D; Smith, MWL; Stanley, F; Tamura, Y; Temi, P; van der Werf, P; Verma, A; Vlahakis, C; Weiss, A; Yang, C; Young, AJ

    MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY   Vol. 522 ( 2 ) page: 2995 - 3017   2023.4

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Monthly Notices of the Royal Astronomical Society  

    We present 101- and 151-GHz ALMA continuum images for 85 fields selected from Herschel observations that have 500-μm flux densities >80 mJy and 250–500-μm colours consistent with z > 2, most of which are expected to be gravitationally lensed or hyperluminous infrared galaxies. Approximately half of the Herschel 500-μm sources were resolved into multiple ALMA sources, but 11 of the 15 brightest 500-μm Herschel sources correspond to individual ALMA sources. For the 37 fields containing either a single source with a spectroscopic redshift or two sources with the same spectroscopic redshift, we examined the colour temperatures and dust emissivity indices. The colour temperatures only vary weakly with redshift and are statistically consistent with no redshift-dependent temperature variations, which generally corresponds to results from other samples selected in far-infrared, submillimetre, or millimetre bands but not to results from samples selected in optical or near-infrared bands. The dust emissivity indices, with very few exceptions, are largely consistent with a value of 2. We also compared spectroscopic redshifts to photometric redshifts based on spectral energy distribution templates designed for infrared-bright high-redshift galaxies. While the templates systematically underestimate the redshifts by ∼15 per cent, the inclusion of ALMA data decreases the scatter in the predicted redshifts by a factor of ∼2, illustrating the potential usefulness of these millimetre data for estimating photometric redshifts.

    DOI: 10.1093/mnras/stac3771

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  7. Bright extragalactic ALMA redshift survey (BEARS) III: detailed study of emission lines from 71 Herschel targets

    Hagimoto, M; Bakx, TJLC; Serjeant, S; Bendo, GJ; Urquhart, SA; Eales, S; Harrington, KC; Tamura, Y; Umehata, H; Berta, S; Cooray, AR; Cox, P; De Zotti, G; Lehnert, MD; Riechers, DA; Scott, D; Temi, P; van der Werf, PP; Yang, C; Amvrosiadis, A; Andreani, PM; Baker, AJ; Beelen, A; Borsato, E; Buat, V; Butler, KM; Dannerbauer, H; Dunne, L; Dye, S; Enia, AFM; Fan, L; Gavazzi, R; González-Nuevo, J; Harris, AI; Herrera, CN; Hughes, DH; Ismail, D; Ivison, RJ; Jones, B; Kohno, K; Krips, M; Lagache, G; Marchetti, L; Massardi, M; Messias, H; Negrello, M; Neri, R; Omont, A; Perez-Fournon, I; Sedgwick, C; Smith, MWL; Stanley, F; Verma, A; Vlahakis, C; Ward, B; Weiner, C; Weiss, A; Young, AJ

    MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY   Vol. 521 ( 4 ) page: 5508 - 5535   2023.3

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Monthly Notices of the Royal Astronomical Society  

    We analyse the molecular and atomic emission lines of 71 bright Herschel-selected galaxies between redshifts 1.4 and 4.6 detected by the Atacama Large Millimeter/submillimeter Array. These lines include a total of 156 CO, [C i], and H2O emission lines. For 46 galaxies, we detect two transitions of CO lines, and for these galaxies we find gas properties similar to those of other dusty star-forming galaxy (DSFG) samples. A comparison to photodissociation models suggests that most of Herschel-selected galaxies have similar interstellar medium conditions as local infrared-luminous galaxies and high-redshift DSFGs, although with denser gas and more intense far-ultraviolet radiation fields than normal star-forming galaxies. The line luminosities agree with the luminosity scaling relations across five orders of magnitude, although the star formation and gas surface density distributions (i.e. Schmidt-Kennicutt relation) suggest a different star formation phase in our galaxies (and other DSFGs) compared to local and low-redshift gas-rich, normal star-forming systems. The gas-to-dust ratios of these galaxies are similar to Milky Way values, with no apparent redshift evolution. Four of 46 sources appear to have CO line ratios in excess of the expected maximum (thermalized) profile, suggesting a rare phase in the evolution of DSFGs. Finally, we create a deep stacked spectrum over a wide rest-frame frequency (220-890 GHz) that reveals faint transitions from HCN and CH, in line with previous stacking experiments.

    DOI: 10.1093/mnras/stad784

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  8. Erratum: “Possible Systematic Rotation in the Mature Stellar Population of a z = 9.1 Galaxy” (2022, ApJL, 933, L19)

    Tsuyoshi Tokuoka, Akio K. Inoue, Takuya Hashimoto, Richard S. Ellis, Nicolas Laporte, Yuma Sugahara, Hiroshi Matsuo, Yoichi Tamura, Yoshinobu Fudamoto, Kana Moriwaki, Guido Roberts-Borsani, Ikkoh Shimizu, Satoshi Yamanaka, Naoki Yoshida, Erik Zackrisson, Wei Zheng

    The Astrophysical Journal Letters   Vol. 944 ( 2 ) page: 19   2023.2

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    Language:English   Publishing type:Research paper (scientific journal)  

    We present new observations with the Atacama Large Millimeter/submillimeter Array for a gravitationally lensed galaxy at z = 9.1, MACS1149-JD1. [O iii] 88 μm emission is detected at 10σ with a spatial resolution of 1/40.3 kpc in the source plane, enabling the most distant morphokinematic study of a galaxy. The [O iii] emission is distributed smoothly without any resolved clumps and shows a clear velocity gradient with "V obs/2σ tot = 0.84 ± 0.23, where "V obs is the observed maximum velocity difference and σ tot is the velocity dispersion measured in the spatially integrated line profile, suggesting a rotating system. Assuming a geometrically thin self-gravitating rotation disk model, we obtain Vrot/σV=0.67-0.26+0.73, where V rot and σ V are the rotation velocity and velocity dispersion, respectively, still consistent with rotation. The resulting disk mass of 0.65-0.40+1.37×109 M ⊙ is consistent with being associated with the stellar mass identified with a 300 Myr old stellar population independently indicated by a Balmer break in the spectral energy distribution. We conclude that the most of the dynamical mass is associated with the previously identified mature stellar population that formed at z ∼15.

    DOI: 10.3847/2041-8213/acb935

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  9. Data science based efficient and automated spectroscopy for submillimeter single-dish telescopes

    Taniguchi A., Tamura Y., Ikeda S., Takekoshi T., Kawabe R., Kohno K., Sakai T.

    2023 35th General Assembly and Scientific Symposium of the International Union of Radio Science, URSI GASS 2023     2023

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:2023 35th General Assembly and Scientific Symposium of the International Union of Radio Science, URSI GASS 2023  

    In this paper, we present a new data scientific approach for efficient and automated spectroscopy with millimeter and submillimeter single-dish telescopes. The proposed approach avoids direct subtraction between two noisy spectra (i.e. on-source and off-source spectra) that is common in the current data reduction: It then offers us to improve the observation sensitivity by a factor of 2 and reduce artificial baseline ripples in parallel with developing observational instruments. We demonstrate such upgrades in the real observed spectra taken by existing large millimeter single-dish telescopes. We finally discuss the application of the proposed approach for the future large submillimeter single-dish telescopes that will yield petabytes of data resulting from sensitive, wide field (1°2), and wide band (>100 GHz) imaging spectroscopy.

    DOI: 10.23919/URSIGASS57860.2023.10265475

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  10. The Kiloparsec-scale Neutral Atomic Carbon Outflow in the Nearby Type 2 Seyfert Galaxy NGC 1068 : Evidence for Negative AGN Feedback Reviewed

      Vol. 927 ( L32 )   2022

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    Language:English   Publishing type:Research paper (scientific journal)  

    CiNii Research

  11. Wavefront sensor for millimeter/submillimeter-wave adaptive optics based on aperture-plane interferometry

    Yoichi Tamura, Ryohei Kawabe, Yuhei Fukasaku, Kimihiro Kimura, Tetsutaro Ueda, Akio Taniguchi, Nozomi Okada, Hideo Ogawa, Ikumi Hashimoto, Tetsuhiro Minamidani, Noriyuki Kawaguchi, Nario Kuno, Yohei Togami, Masato Hagimoto, Satoya Nakano, Keiichi Matsuda, Sachiko K. Okumura, Tomoko Nakamura, Mikio Kurita, Tatsuya Takekoshi, Tai Oshima, Toshikazu Onishi, Kotaro Kohno

    Proceedings of the SPIE   Vol. 11445   page: 114451N   2020

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (international conference proceedings)   Publisher:SPIE  

    We present a concept of a millimeter wavefront sensor that allows real-time sensing of the surface of a groundbased millimeter/submillimeter telescope. It is becoming important for ground-based millimeter/submillimeter astronomy to make telescopes larger with keeping their surface accurate. To establish 'millimetric adaptive optics (MAO)' that instantaneously corrects the wavefront degradation induced by deformation of telescope optics, our wavefront sensor based on radio interferometry measures changes in excess path lengths from characteristic positions on the primary mirror surface to the focal plane. This plays a fundamental role in planed 50-m class submillimeter telescopes such as LST and AtLAST.

    DOI: 10.1117/12.2561885

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  12. First light demonstration of the integrated superconducting spectrometer Reviewed

    Akira Endo, Kenichi Karatsu, Yoichi Tamura, Tai Oshima, Akio Taniguchi, Tatsuya Takekoshi, Shin’ichiro Asayama, Tom J. L. C. Bakx, Sjoerd Bosma, Juan Bueno, Kah Wuy Chin, Yasunori Fujii, Kazuyuki Fujita, Robert Huiting, Soh Ikarashi, Tsuyoshi Ishida, Shun Ishii, Ryohei Kawabe, Teun M. Klapwijk, Kotaro Kohno, Akira Kouchi, Nuria Llombart, Jun Maekawa, Vignesh Murugesan, Shunichi Nakatsubo, Masato Naruse, Kazushige Ohtawara, Alejandro Pascual Laguna, Junya Suzuki, Koyo Suzuki, David J. Thoen, Takashi Tsukagoshi, Tetsutaro Ueda, Pieter J. de Visser, Paul P. van der Werf, Stephen J. C. Yates, Yuki Yoshimura, Ozan Yurduseven, Jochem J. A. Baselmans

    Nature Astronomy   Vol. 3 ( 11 ) page: 989 - 996   2019.11

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    Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:Springer Science and Business Media {LLC}  

    Ultra-wideband 3D imaging spectrometry in the millimeter-submillimeter
    (mm-submm) band is an essential tool for uncovering the dust-enshrouded portion
    of the cosmic history of star formation and galaxy evolution. However, it is
    challenging to scale up conventional coherent heterodyne receivers or
    free-space diffraction techniques to sufficient bandwidths ($\geq$1 octave) and
    numbers of spatial pixels (>$10^2$). Here we present the design and first
    astronomical spectra of an intrinsically scalable, integrated superconducting
    spectrometer, which covers 332-377 GHz with a spectral resolution of $F/\Delta
    F \sim 380$. It combines the multiplexing advantage of microwave kinetic
    inductance detectors (MKIDs) with planar superconducting filters for dispersing
    the signal in a single, small superconducting integrated circuit. We
    demonstrate the two key applications for an instrument of this type: as an
    efficient redshift machine, and as a fast multi-line spectral mapper of
    extended areas. The line detection sensitivity is in excellent agreement with
    the instrument design and laboratory performance, reaching the atmospheric
    foreground photon noise limit on sky. The design can be scaled to bandwidths in
    excess of an octave, spectral resolution up to a few thousand and frequencies
    up to $\sim$1.1 THz. The miniature chip footprint of a few $\mathrm{cm^2}$
    allows for compact multi-pixel spectral imagers, which would enable
    spectroscopic direct imaging and large volume spectroscopic surveys that are
    several orders of magnitude faster than what is currently possible.

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  13. Gas filaments of the cosmic web located around active galaxies in a protocluster Reviewed

    Umehata, H., Fumagalli, M., Smail, I., Matsuda, Y., Swinbank, A. M., Cantalupo, S., Sykes, C., Ivison, R. J., Steidel, C. C., Shapley, A. E., Vernet, J., Yamada, T., Tamura, Y., Kubo, M., Nakanishi, K., Kajisawa, M., Hatsukade, B., Kohno, K.

    Science   Vol. 366 ( 6461 ) page: 97 - +   2019.10

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    Cosmological simulations predict that the Universe contains a network of intergalactic gas filaments, within which galaxies form and evolve. However, the faintness of any emission from these filaments has limited tests of this prediction. We report the detection of rest-frame ultraviolet Lyman-α radiation from multiple filaments extending more than one megaparsec between galaxies within the SSA22 protocluster at a redshift of 3.1. Intense star formation and supermassive black-hole activity is occurring within the galaxies embedded in these structures, which are the likely sources of the elevated ionizing radiation powering the observed Lyman-α emission. Our observations map the gas in filamentary structures of the type thought to fuel the growth of galaxies and black holes in massive protoclusters....

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  14. Big Three Dragons: A z = 7.15 Lyman-break galaxy detected in [O III] 88 μm, [CII] 158 μm, and dust continuum with ALMA Reviewed

    Takuya Hashimoto, Akio K Inoue, Ken Mawatari, Yoichi Tamura, Hiroshi Matsuo, Hisanori Furusawa, Yuichi Harikane, Takatoshi Shibuya, Kirsten K Knudsen, Kotaro Kohno, Yoshiaki Ono, Erik Zackrisson, Takashi Okamoto, Nobunari Kashikawa, Pascal A Oesch, Masami Ouchi, Kazuaki Ota, Ikkoh Shimizu, Yoshiaki Taniguchi, Hideki Umehata, Darach Watson

    Publications of the Astronomical Society of Japan   Vol. 71 ( 4 )   2019.8

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    We present new ALMA observations and physical properties of a Lyman break galaxy at z = 7.15. Our target, B14-65666, has a bright ultra-violet (UV) absolute magnitude, MUV ≈ −22.4, and has been spectroscopically identified in Lyα with a small rest-frame equivalent width of ≈4 Å. A previous Hubble Space TElescope (HST) image has shown that the target is composed of two spatially separated clumps in the rest-frame UV. With ALMA, we have newly detected spatially resolved [O iii] 88 μm, [C ii] 158 μm, and their underlying dust continuum emission. In the whole system of B14-65666, the [O iii] and [C ii] lines have consistent redshifts of 7.1520 ± 0.0003, and the [O iii] luminosity, (34.4 ± 4.1) × 108 L⊙, is about three times higher than the [C ii] luminosity, (11.0 ± 1.4) × 108 L⊙. With our two continuum flux densities, the dust temperature is constrained to be Td ≈ 50–60 K under the assumption of a dust emissivity index of βd = 2.0–1.5, leading to a large total infrared luminosity of LTIR ≈ 1 × 1012 L⊙. Owing to our high spatial resolution data, we show that the [O iii] and [C ii] emission can be spatially decomposed into two clumps associated with the two rest-frame UV clumps whose spectra are kinematically separated by ≈200 km s−1. We also find these two clumps have comparable UV, infrared, [O iii], and [C ii] luminosities. Based on these results, we argue that B14-65666 is a starburst galaxy induced by a major merger. The merger interpretation is also supported by the large specific star formation rate (defined as the star formation rate per unit stellar mass), sSFR $= 260^{+119}_{-57}\:$Gyr−1, inferred from our SED fitting. Probably, a strong UV radiation field caused by intense star formation contributes to its high dust temperature and the [O iii]-to-[C ii] luminosity ratio.

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  15. Detection of the Far-infrared [O iii] and Dust Emission in a Galaxy at Redshift 8.312: Early Metal Enrichment in the Heart of the Reionization Era Reviewed International coauthorship

    Yoichi Tamura, Ken Mawatari, Takuya Hashimoto, Akio K. Inoue, Erik Zackrisson, Lise Christensen, Christian Binggeli, Yuichi Matsuda, Hiroshi Matsuo, Tsutomu T. Takeuchi, Ryosuke S. Asano, Kaho Sunaga, Ikkoh Shimizu, Takashi Okamoto, Naoki Yoshida, Minju M. Lee, Takatoshi Shibuya, Yoshiaki Taniguchi, Hideki Umehata, Bunyo Hatsukade, Kotaro Kohno, Kazuaki Ota

    The Astrophysical Journal   Vol. 874 ( 1 ) page: 27 - 27   2019.3

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    We present the Atacama Large Millimeter/submillimeter Array detection of the [O III] 88 mu m line and rest-frame 90 mu m dust continuum emission in a Y-dropout Lyman break galaxy (LBG), MACS0416_Y1 lying behind the Frontier Field cluster MACS J0416.1-2403. This [O III] detection confirms the LBG with a spectroscopic redshift of z = 8.3118 +/- 0.0003, making this object one of the farthest galaxies ever identified spectroscopically. The observed 850 mu m flux density of 137 +/- 26 mu Jy corresponds to a de-lensed total infrared (IR) luminosity of L-IR = (1.7 +/- 0.3) x 10(11) L-circle dot if assuming a dust temperature of T-dust = 50 K and an emissivity index of beta = 1.5, yielding a large dust mass of 4 x 10(6) M-circle dot. The ultraviolet-to-far-IR spectral energy distribution modeling where the [O III] emissivity model is incorporated suggests the presence of a young (tau(age) approximate to 4 Myr), star-forming (SFR approximate to 60 M-circle dot yr(-1)), moderately metal-polluted (Z approximate to 0.2 Z(circle dot)) stellar component with a mass of M-star = 3 x 10(8) M-circle dot. An analytic dust mass evolution model with a single episode of star formation does not reproduce the metallicity and dust mass in tau(age) approximate to 4 Myr, suggesting a pre-existing evolved stellar component with M-star similar to 3 x 10(9) M-circle dot and tau(age) similar to 0.3 Gyr as the origin of the dust mass.

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  16. The onset of star formation 250 million years after the Big Bang Reviewed

    Hashimoto, Takuya, Laporte, Nicolas, Mawatari, Ken, Ellis, Richard S., Inoue, Akio K., Zackrisson, Erik, Roberts-Borsani, Guido, Zheng, Wei, Tamura, Yoichi, Bauer, Franz E., Fletcher, Thomas, Harikane, Yuichi, Hatsukade, Bunyo, Hayatsu, Natsuki H., Matsuda, Yuichi, Matsuo, Hiroshi, Okamoto, Takashi, Ouchi, Masami, Pelló, Roser, Rydberg, Claes-Erik, Shimizu, Ikkoh, Taniguchi, Yoshiaki, Umehata, Hideki, Yoshida, Naoki

    Nature   Vol. 557 ( 7705 ) page: 392 - +   2018.5

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    A fundamental quest of modern astronomy is to locate the earliest galaxies and study how they influenced the intergalactic medium a few hundred million years after the Big Bang<SUP>1-3</SUP>. The abundance of star-forming galaxies is known to decline<SUP>4,5</SUP> from redshifts of about 6 to 10, but a key question is the extent of star formation at even earlier times, corresponding to the period when the first galaxies might have emerged. Here we report spectroscopic observations of MACS1149-JD1<SUP>6</SUP>, a gravitationally lensed galaxy observed when the Universe was less than four per cent of its present age. We detect an emission line of doubly ionized oxygen at a redshift of 9.1096 ± 0.0006, with an uncertainty of one standard deviation. This precisely determined redshift indicates that the red rest-frame optical colour arises from a dominant stellar component that formed about 250 million years after the Big Bang, corresponding to a redshift of about 15. Our results indicate that it may be possible to detect such early episodes of star formation in similar galaxies with future telescopes....

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  17. Large-scale Mapping Observations of DCN and DCO<sup>+</sup> toward Orion KL

    Kotomi Taniguchi, Prathap Rayalacheruvu, Teppei Yonetsu, Tatsuya Takekoshi, Bunyo Hatsukade, Kotaro Kohno, Tai Oshima, Yoichi Tamura, Yuki Yoshimura, Víctor Gómez-Rivera, Sergio Rojas-García, Arturo I. Gómez-Ruiz, David H. Hughes, F. Peter Schloerb, Liton Majumdar, Masao Saito, Iván Rodríguez-Montoya, David Sánchez-Arguelles, Ryohei Kawabe

    The Astrophysical Journal   Vol. 963 ( 1 ) page: 12 - 12   2024.2

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    Abstract

    We present emission maps ($1\buildrel{\,\prime}\over{.} 5\,\times \,1\buildrel{\,\prime}\over{.} 5$ scale, corresponding to 0.18 pc) of the DCN (J = 2 − 1) and DCO<sup>+</sup> (J = 2 − 1) lines in the 2 mm band toward the Orion KL region obtained with the 2 mm receiver system named B4R installed on the Large Millimeter Telescope. The DCN emission shows a peak at the Orion KL hot core position, whereas no DCO<sup>+</sup> emission has been detected there. The DCO<sup>+</sup> emission shows enhancement at the west side of the hot core, which is well shielded from the UV radiation from OB massive stars in the Trapezium cluster. We have derived the abundance ratio of DCN/DCO<sup>+</sup> at three representative positions where both species have been detected. The gas components with V<sub>LSR</sub> ≈ 7.5–8.7 km s<sup>−1</sup> are associated with low abundance ratios of ∼4–6, whereas much higher abundance ratios (∼22–30) are derived for the gas components with V<sub>LSR</sub> ≈ 9.2–11.6 km s<sup>−1</sup>. We have compared the observed abundance ratio to our chemical models and found that the observed differences in the DCN/DCO<sup>+</sup> abundance ratios are explained by different densities.

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  18. Molecular Abundance of the Circumnuclear Region Surrounding an Active Galactic Nucleus in NGC 1068 Based on an Imaging Line Survey in the 3 mm Band with ALMA

    Taku Nakajima, Shuro Takano, Tomoka Tosaki, Akio Taniguchi, Nanase Harada, Toshiki Saito, Masatoshi Imanishi, Yuri Nishimura, Takuma Izumi, Yoichi Tamura, Kotaro Kohno, Eric Herbst

    The Astrophysical Journal   Vol. 955 ( 1 ) page: 27 - 27   2023.9

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    Abstract

    We present an imaging molecular line survey in the 3 mm band (85–114 GHz) focused on one of the nearest galaxies with an active galactic nucleus (AGN), NGC 1068, based on observations taken with the Atacama Large Millimeter/submillimeter Array. Distributions of 23 molecular transitions are obtained in the central ∼3 kpc region, including both the circumnuclear disk (CND) and starburst ring (SBR) with 60 and 350 pc resolution. The column densities and relative abundances of all the detected molecules are estimated under the assumption of local thermodynamic equilibrium in the CND and SBR. Then, we discuss the physical and chemical effects of the AGN on molecular abundance corresponding to the observation scale. We found that H<sup>13</sup>CN, SiO, HCN, and H<sup>13</sup>CO<sup>+</sup> are abundant in the CND relative to the SBR. In contrast, <sup>13</sup>CO is more abundant in the SBR. Based on the calculated column density ratios of N(HCN)/N(HCO<sup>+</sup>), N(HCN)/N(CN), and other molecular distributions, we conclude that the enhancement of HCN in the CND may be due to high-temperature environments resulting from strong shocks, which are traced by the SiO emission. Moreover, the abundance of CN in the CND is significantly lower than the expected value of the model calculations in the region affected by strong radiation. The expected strong X-ray irradiation from the AGN has a relatively lower impact on the molecular abundance in the CND than mechanical feedback.

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  19. Reionization and the ISM/Stellar Origins with JWST and ALMA (RIOJA): The Core of the Highest-redshift Galaxy Overdensity at z = 7.88 Confirmed by NIRSpec/JWST

    T. Hashimoto, J. Álvarez-Márquez, Y. Fudamoto, L. Colina, A. K. Inoue, Y. Nakazato, D. Ceverino, N. Yoshida, L. Costantin, Y. Sugahara, A. Crespo Gómez, C. Blanco-Prieto, K. Mawatari, S. Arribas, R. Marques-Chaves, M. Pereira-Santaella, T. J.L.C. Bakx, M. Hagimoto, T. Hashigaya, H. Matsuo, Y. Tamura, M. Usui, Y. W. Ren

    Astrophysical Journal Letters   Vol. 955 ( 1 )   2023.9

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    The protoclusters in the epoch of reionization, traced by galaxy overdensity regions, are ideal laboratories for studying the process of stellar assembly and cosmic reionization. We present the spectroscopic confirmation of the core of the most distant protocluster at z = 7.88, A2744-z7p9OD, with the James Webb Space Telescope NIRSpec integral field unit spectroscopy. The core region includes as many as four galaxies detected in [O iii] 4960 and 5008 Å in a small area of ∼3″ × 3″, corresponding to ∼11 × 11 kpc, after the lensing magnification correction. Three member galaxies are also tentatively detected in dust continuum in Atacama Large Millimeter/submillimeter Array Band 6, which is consistent with their red ultraviolet continuum slopes, β ∼ −1.3. The member galaxies have stellar masses in the range of log(M */M ⊙) ∼7.6-9.2 and star formation rates of ∼3-50 M ⊙ yr−1, showing a diversity in their properties. FirstLight cosmological simulations reproduce the physical properties of the member galaxies including the stellar mass, [O iii] luminosity, and dust-to-stellar mass ratio, and predict that the member galaxies are on the verge of merging in a few to several tens of Myr to become a large galaxy with M * ∼ 6 × 109 M ⊙. The presence of a multiple merger and evolved galaxies in the core region of A2744-z7p9OD indicates that environmental effects are already at work 650 Myr after the Big Bang.

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  20. Characterizing CO Emitters in the SSA22-AzTEC26 Field

    Shuo Huang, Hideki Umehata, Ryohei Kawabe, Kotaro Kohno, Minju Lee, Yoichi Tamura, Bunyo Hatsukade, Ken Mawatari

    Astrophysical Journal   Vol. 953 ( 1 )   2023.8

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    We report the physical characterization of four CO emitters detected near the bright submillimeter galaxy (SMG) SSA22-AzTEC26. We analyze the data from Atacama Large Millimeter/submillimeter Array band 3, 4, and 7 observations of the SSA22-AzTEC26 field. In addition to the targeted SMG, we detect four line emitters with signal-to-noise ratio >5.2 in the cube smoothed with a 300 km s−1 FWHM Gaussian filter. All four sources have NIR counterparts within 1″. We perform UV-to-FIR spectral energy distribution modeling to derive the photometric redshifts and physical properties. Based on the photometric redshifts, we reveal that two of them are CO(2-1) at redshifts of 1.113 and 1.146 and one is CO(3-2) at z = 2.124. The three sources are massive galaxies with a stellar mass ≳1010.5 M ⊙, but have different levels of star formation. Two lie within the scatter of the main sequence (MS) of star-forming galaxies at z ∼ 1-2, and the most massive galaxy lies significantly below the MS. However, all three sources have a gas fraction within the scatter of the MS scaling relation. This shows that a blind CO line search can detect massive galaxies with low specific star formation rates that still host large gas reservoirs and that it also complements targeted surveys, suggesting later gas acquisition and the need for other mechanisms in addition to gas consumption to suppress star formation.

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  21. Big Three Dragons: Molecular Gas in a Bright Lyman-break Galaxy at z = 7.15

    Takuya Hashimoto, Akio K. Inoue, Yuma Sugahara, Yoshinobu Fudamoto, Seiji Fujimoto, K. K. Knudsen, Hiroshi Matsuo, Yoichi Tamura, Satoshi Yamanaka, Yuichi Harikane, Nario Kuno, Yoshiaki Ono, Dragan Salak, Nozomi Ishii

    Astrophysical Journal   Vol. 952 ( 1 )   2023.7

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    We report Atacama Large Millimeter/submillimeter Array Band 3 observations of CO(6−5), CO(7−6), and [C i](2−1) in B14-65666 (“Big Three Dragons”), one of the brightest Lyman-break galaxies at z > 7 in the rest-frame ultraviolet continuum, far-infrared continuum, and emission lines of [O iii] 88 μm and [C ii] 158 μm. CO(6−5), CO(7−6), and [C i](2−1), whose 3σ upper limits on the luminosities are approximately 40 times fainter than the [C ii] luminosity, are all not detected. The L [C II]/L CO(6-5) and L [C II]/L CO(7-6) ratios are higher than the typical ratios obtained in dusty star-forming galaxies or quasar host galaxies at similar redshifts, and they may suggest a lower gas density in the photodissociated region in B14-65666. By using the (1) [C ii] luminosity, (2) dust mass-to-gas mass ratio, and (3) a dynamical mass estimate, we find that the molecular gas mass (M mol) is (0.05-11) × 1010 M ⊙. This value is consistent with the upper limit inferred from the nondetection of mid-J CO and [C i](2−1). Despite the large uncertainty in M mol, we estimate a molecular gas-to-stellar mass ratio (μ gas) of 0.65-140 and a gas depletion time (τ dep) of 2.5-550 Myr; these values are broadly consistent with those of other high-redshift galaxies. B14-65666 could be an ancestor of a passive galaxy at z ≳ 4 if no gas is fueled from outside the galaxy.

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  22. The 300 pc Resolution Imaging of a z = 8.31 Galaxy: Turbulent Ionized Gas and Potential Stellar Feedback 600 Million Years after the Big Bang Reviewed

    Yoichi Tamura, Tom J. L. C. Bakx, Akio K. Inoue, Takuya Hashimoto, Tsuyoshi Tokuoka, Chihiro Imamura, Bunyo Hatsukade, Minju M. Lee, Kana Moriwaki, Takashi Okamoto, Kazuaki Ota, Hideki Umehata, Naoki Yoshida, Erik Zackrisson, Masato Hagimoto, Hiroshi Matsuo, Ikkoh Shimizu, Yuma Sugahara, Tsutomu T. Takeuchi

    The Astrophysical Journal   Vol. 952 ( 1 )   2023.7

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    We present the results of 300 pc resolution Atacama Large Millimeter/submillimeter Array imaging of the [O iii] 88 & mu;m line and dust continuum emission from a z = 8.312 Lyman-break galaxy MACS0416_Y1. The velocity-integrated [O iii] emission has three peaks that are likely associated with three young stellar clumps of MACS0416_Y1, while the channel map shows a complicated velocity structure with little indication of a global velocity gradient unlike what was found in [C ii] 158 & mu;m at a larger scale, suggesting random bulk motion of ionized gas clouds inside the galaxy. In contrast, dust emission appears as two individual clumps apparently separating or bridging the [O iii]/stellar clumps. The cross-correlation coefficient between dust and ultraviolet-related emission (i.e., [O iii] and ultraviolet continuum) is unity on a galactic scale, while it drops at <1 kpc, suggesting well-mixed geometry of multiphase interstellar media on subkiloparsec scales. If the cutoff scale characterizes different stages of star formation, the cutoff scale can be explained by gravitational instability of turbulent gas. We also report on a kiloparsec-scale off-center cavity embedded in the dust continuum image. This could be a superbubble producing galactic-scale outflows, since the energy injection from the 4 Myr starburst suggested by a spectral energy distribution analysis is large enough to push the surrounding media creating a kiloparsec-scale cavity.

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  23. Detections of [C ii] 158 <i>μ</i>m and [O iii] 88 <i>μ</i>m in a Local Lyman Continuum Emitter, Mrk 54, and Its Implications to High-redshift ALMA Studies*

    Ryota Ura, Takuya Hashimoto, Akio K. Inoue, Dario Fadda, Matthew Hayes, Johannes Puschnig, Erik Zackrisson, Yoichi Tamura, Hiroshi Matsuo, Ken Mawatari, Yoshinobu Fudamoto, Masato Hagimoto, Nario Kuno, Yuma Sugahara, Satoshi Yamanaka, Tom J. L. C. Bakx, Yurina Nakazato, Mitsutaka Usui, Hidenobu Yajima, Naoki Yoshida

    ASTROPHYSICAL JOURNAL   Vol. 948 ( 1 )   2023.5

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    We present integral field, far-infrared (FIR) spectroscopy of Mrk 54, a local Lyman continuum emitter, obtained with FIFI-LS on the Stratospheric Observatory for Infrared Astronomy. This is only the second time, after Haro 11, that [C ii] 158 mu m and [O iii] 88 mu m spectroscopy of the known LCEs have been obtained. We find that Mrk 54 has a strong [C ii] emission that accounts for similar to 1% of the total FIR luminosity, whereas it has only moderate [O iii] emission, resulting in the low [O iii]/[C ii] luminosity ratio of 0.22 +/- 0.06. In order to investigate whether [O iii]/[C ii] is a useful tracer of f (esc) (LyC escape fraction), we examine the correlations of [O iii]/[C ii] and (i) the optical line ratio of O-32 equivalent to [O iii] 5007 angstrom/[O ii] 3727 angstrom, (ii) specific star formation rate, (iii) [O iii] 88 mu m/[O i] 63 mu m ratio, (iv) gas-phase metallicity, and (v) dust temperature based on a combined sample of Mrk 54 and the literature data from the Herschel Dwarf Galaxy Survey and the LITTLE THINGS Survey. We find that galaxies with high [O iii]/[C ii] luminosity ratios could be the result of high ionization (traced by O-32), bursty star formation, high ionized-to-neutral gas volume filling factors (traced by [O iii] 88 mu m/[O i] 63 mu m), and low gas-phase metallicities, which is in agreement with theoretical predictions. We present an empirical relation between the [O iii]/[C ii] ratio and f (esc) based on the combination of the [O iii]/[C ii] and O-32 correlation, and the known relation between O-32 and f (esc). The relation implies that high-redshift galaxies with high [O iii]/[C ii] ratios revealed by the Atacama Large Millimeter/submillimeter Array may have f (esc) greater than or similar to 0.1, significantly contributing to the cosmic reionization.

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  24. Updated Measurements of [O iii] 88 μm, [C ii] 158 μm, and Dust Continuum Emission from a z = 7.2 Galaxy Reviewed

    Yi W. Ren, Yoshinobu Fudamoto, Akio K. Inoue, Yuma Sugahara, Tsuyoshi Tokuoka, Yoichi Tamura, Hiroshi Matsuo, Kotaro Kohno, Hideki Umehata, Takuya Hashimoto, Rychard J. Bouwens, Renske Smit, Nobunari Kashikawa, Takashi Okamoto, Takatoshi Shibuya, Ikkoh Shimizu

    The Astrophysical Journal   Vol. 945 ( 1 ) page: 69   2023.3

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  25. Bright Extragalactic ALMA Redshift Survey (BEARS) III: Detailed study of emission lines from 71 Herschel targets Reviewed

    Hagimoto, M, Bakx, T. J. L. C, Serjeant, S, Bendo, G. J, Urquhart, S. A, Eales, S, Harrington, K. C, Tamura, Y, Umehata, H, Berta, S, Cooray, A. R, Cox, P, De Zotti, G, Lehnert, M. D, Riechers, D. A, Scott, D, Temi, P, van der Werf, P. P, Yang, C, Amvrosiadis, A, Andreani, P. M, Baker, A. J, Beelen, A, Borsato, E, Buat, V, Butler, K. M, Dannerbauer, H, Dunne, L, Dye, S, Enia, A. F. M, Fan, L, Gavazzi, R, Gonzalez-Nuevo, J, Harris, A. I, Herrera, C. N, Hughes, D. H, Ismail, D, Ivison, R. J, Jones, B, Kohno, K, Krips, M, Lagache, G, Marchetti, L, Massardi, M, Messias, H, Negrello, M, Neri, R, Omont, A, Perez-Fournon, I, Sedgwick, C, Smith, M. W. L, Stanley, F, Verma, A, Vlahakis, C, Ward, B, Weiner, C, Weiss, A, Young, A. J

    Monthly Notices of the Royal Astronomical Society     2023.3

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  26. The SCUBA-2 Large eXtragalactic Survey: 850μm map, catalogue and the bright-end number counts of the XMM-LSS field Reviewed

    T K Garratt, J E Geach, Y Tamura, K E K Coppin, M Franco, Y Ao, C -C Chen, C Cheng, D L Clements, Y S Dai, H Dannerbauer, T R Greve, B Hatsukade, H S Hwang, L Jiang, K Kohno, M P Koprowski, M J Michałowski, M Sawicki, D Scott, H Shim, T T Takeuchi, W -H Wang, Y Q Xue, C Yang

    Monthly Notices of the Royal Astronomical Society   Vol. 520 ( 3 ) page: 3669 - 3687   2023.2

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  27. Deep ALMA redshift search of a z ~ 12 GLASS-JWST galaxy candidate Reviewed

    Bakx, Tom, Zavala, Jorge A, Mitsuhashi, Ikki, Treu, Tommaso, Fontana, Adriano, Tadaki, Ken-ichi, Casey, Caitlin M, Castellano, Marco, Glazebrook, Karl, Hagimoto, Masato, Ikeda, Ryota, Jones, Tucker, Leethochawalit, Nicha, Mason, Charlotte, Morishita, Takahiro, Nanayakkara, Themiya, Pentericci, Laura, Roberts-Borsani, Guido, Santini, Paola, Serjeant, Stephen, Tamura, Yoichi, Trenti, Michele, Vanzella, Eros

    Monthly Notices of the Royal Astronomical Society   Vol. 519 ( 4 ) page: 5076 - 5085   2023.1

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    DOI: 10.1093/mnras/stac3723

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  28. ALMA Observations of CO Emission from Luminous Lyman-break Galaxies at z = 6.0293–6.2037 Reviewed

    Yoshiaki Ono, Seiji Fujimoto, Yuichi Harikane, Masami Ouchi, Livia Vallini, Andrea Ferrara, Takatoshi Shibuya, Andrea Pallottini, Akio K. Inoue, Masatoshi Imanishi, Kazuhiro Shimasaku, Takuya Hashimoto, Chien-Hsiu Lee, Yuma Sugahara, Yoichi Tamura, Kotaro Kohno, Malte Schramm

    The Astrophysical Journal   Vol. 941 ( 1 ) page: 74 - 74   2022.12

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    We present our new Atacama Large Millimeter/submillimeter Array (ALMA) observations targeting CO(6–5) emission from three luminous Lyman-break galaxies (LBGs) at z<sub>spec</sub> = 6.0293–6.2037 found in the Subaru/Hyper Suprime-Cam survey, whose [O iii] 88 μm and [C ii] 158 μm emissions have been detected with ALMA. We find a marginal detection of the CO(6–5) line from one of our LBGs, J0235–0532, at the ≃4σ significance level and obtain upper limits for the other two LBGs, J1211–0118 and J0217–0208. Our z = 6 luminous LBGs are consistent with the previously found correlation between the CO luminosity and the infrared luminosity. The unique ensemble of the multiple far-infrared emission lines and underlying continuum fed to a photodissociation region model reveals that J0235–0532 has a relatively high density of hydrogen nuclei n<sub>H</sub> that is comparable to those of low-z (U)LIRGs, quasars, and Galactic star-forming regions with high n<sub>H</sub> values, while the other two LBGs have lower n<sub>H</sub> consistent with local star-forming galaxies. By carefully taking account of various uncertainties, we obtain constraints on total gas mass and gas surface density from their CO luminosity measurements. We find that J0235–0532 is located below the Kennicutt–Schmidt (KS) relation, comparable to the z = 5.7 LBG, HZ10, previously detected with CO(2–1). Combined with previous results for dusty starbursts at similar redshifts, the KS relation at z = 5–6 is on average consistent with the local one.

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  29. Central concentration of warm and dense molecular gas in a strongly lensed submillimeter galaxy at z = 6 Reviewed

    Akiyoshi Tsujita, Ken-ichi Tadaki, Kotaro Kohno, Bunyo Hatsukade, Fumi Egusa, Yoichi Tamura, Yuri Nishimura, Jorge Zavala, Toshiki Saito, Hideki Umehata, Minju M Lee

    Publications of the Astronomical Society of Japan   Vol. 74 ( 6 ) page: 1429 - 1440   2022.12

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  30. Deshima 2.0: Rapid Redshift Surveys and Multi-line Spectroscopy of Dusty Galaxies Reviewed

    M. Rybak, T. Bakx, J. Baselmans, K. Karatsu, K. Kohno, T. Takekoshi, Y. Tamura, A. Taniguchi, P. van der Werf, A. Endo

    Journal of Low Temperature Physics   Vol. 209 ( 5-6 ) page: 766 - 778   2022.12

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    We present a feasibility study for the high-redshift galaxy part of the Science Verification Campaign with the 220–440 GHz deshima 2.0 integrated superconducting spectrometer on the ASTE telescope. The first version of the deshima 2.0 chip has been recently manufactured and tested in the lab. Based on these realistic performance measurements, we evaluate potential target samples and prospects for detecting the [CII] and CO emission lines. The planned observations comprise two distinct, but complementary objectives: (1) acquiring spectroscopic redshifts for dusty galaxies selected in far-infrared/mm-wave surveys; (2) multi-line observations to infer physical conditions in dusty galaxies.

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  31. DESHIMA 2.0: Development of an Integrated Superconducting Spectrometer for Science-Grade Astronomical Observations Reviewed

    Akio Taniguchi, Tom J. L. C. Bakx, Jochem J. A. Baselmans, Robert Huiting, Kenichi Karatsu, Nuria Llombart, Matus Rybak, Tatsuya Takekoshi, Yoichi Tamura, Hiroki Akamatsu, Stefanie Brackenhoff, Juan Bueno, Bruno T. Buijtendorp, Shahab O. Dabironezare, Anne-Kee Doing, Yasunori Fujii, Kazuyuki Fujita, Matthijs Gouwerok, Sebastian Hähnle, Tsuyoshi Ishida, Shun Ishii, Ryohei Kawabe, Tetsu Kitayama, Kotaro Kohno, Akira Kouchi, Jun Maekawa, Keiichi Matsuda, Vignesh Murugesan, Shunichi Nakatsubo, Tai Oshima, Alejandro Pascual Laguna, David J. Thoen, Paul P. van der Werf, Stephen J. C. Yates, Akira Endo

    Journal of Low Temperature Physics   Vol. 209 ( 3-4 ) page: 278 - 286   2022.11

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    Integrated superconducting spectrometer (ISS) technology will enable ultra-wideband, integral-field spectroscopy for (sub)millimeter-wave astronomy, in particular, for uncovering the dust-obscured cosmic star formation and galaxy evolution over cosmic time. Here, we present the development of DESHIMA 2.0, an ISS for ultra-wideband spectroscopy toward high-redshift galaxies. DESHIMA 2.0 is designed to observe the 220–440 GHz band in a single shot, corresponding to a redshift range of z = 3.3–7.6 for the ionized carbon emission ([C II] 158 μ m). The first-light experiment of DESHIMA 1.0, using the 332–377 GHz band, has shown an excellent agreement among the on-sky measurements, the laboratory measurements, and the design. As a successor to DESHIMA 1.0, we plan the commissioning and the scientific observation campaign of DESHIMA 2.0 on the ASTE 10-m telescope in 2023. Ongoing upgrades for the full octave-bandwidth system include the wideband 347-channel chip design and the wideband quasi-optical system. For efficient measurements, we also develop the observation strategy using the mechanical fast sky-position chopper and the sky-noise removal technique based on a novel data-scientific approach. In the paper, we show the recent status of the upgrades and the plans for the scientific observation campaign.

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  32. Characterization of sensitivity and responses of a 2-element prototype wavefront sensor for millimeter-wave adaptive optics attached to the Nobeyama 45 m telescope

    Satoya Nakano, Yoichi Tamura, Akio Taniguchi, Sachiko K. Okumura, Ryohei Kawabe, Nozomi Okada, Tomoko Nakamura, Yuhei Fukasaku

    Proceedings of the SPIE   Vol. 12185   page: 121856Z   2022.8

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  33. Development status of TAO/MIMIZUKU: performance test of the near-infrared channel Invited

    Takafumi Kamizuka, Takashi Miyata, Shigeyuki Sako, Ryou Ohsawa, Kentaro Asano, Atsushi Nishimura, Kengo Tachibana, Tsubasa Michifuji, Hirokazu Iida, Akira C. Naruse, Mizuho Uchiyama, Itsuki Sakon, Takashi Onaka, Hirokazu Kataza, Sunao Hasegawa, Fumihiko Usui, Naruhisa Takato, Noboru Ebizuka, Takuya Hosobata, Tsutomu Aoki, Mamoru Doi, Fumi Egusa, Bunyo Hatsukade, Natsuko Kato, Kotaro Kohno, Masahiro Konishi, Shintaro Koshida, Shuhei Koyama, Takeo Minezaki, Tomoki Morokuma, Kentaro Motohara, Mizuki Numata, Hiroaki Sameshima, Hidenori Takahashi, Yoichi Tamura, Toshihiko Tanabe, Masuo Tanaka, Kosuke Kushibiki, Nuo Chen, Shogo Homan, Yuzuru Yoshii

    Proceedings of the SPIE   Vol. 12184   page: 121845J   2022.8

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  34. An AGN with an Ionized Gas Outflow in a Massive Quiescent Galaxy in a Protocluster at z = 3.09 Reviewed

    Mariko Kubo, Hideki Umehata, Yuichi Matsuda, Masaru Kajisawa, Charles C. Steidel, Toru Yamada, Ichi Tanaka, Bunyo Hatsukade, Yoichi Tamura, Kouichiro Nakanishi, Kotaro Kohno, Kianhong Lee, Keiichi Matsuda, Yiping Ao, Tohru Nagao, Min S. Yun

    The Astrophysical Journal   Vol. 935 ( 2 ) page: 89 - 89   2022.8

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    We report the detection of an ionized gas outflow from an X-ray active galactic nucleus hosted in a massive quiescent galaxy in a protocluster at z = 3.09 (J221737.29+001823.4). It is a type-2 QSO with broad (W<sub>80</sub> &gt; 1000 km s<sup>−1</sup>) and strong ($\mathrm{log}({L}_{[\mathrm{OIII}]}$/erg s<sup>−1</sup>) ≈ 43.4) [O iii]λλ 4959,5007 emission lines detected by slit spectroscopy in three-position angles using Multi-Object Infra-Red Camera and Spectrograph (MOIRCS) on the Subaru telescope and the Multi-Object Spectrometer For Infra-Red Exploration (MOSFIRE) on the Keck-I telescope. In the all slit directions, [O iii] emission is extended to ∼15 physical kpc and indicates a powerful outflow spreading over the host galaxy. The inferred ionized gas mass outflow rate is 22 ± 3 M<sub>⊙</sub> yr<sup>−1</sup>. Although it is a radio source, according to the line diagnostics using Hβ, [O ii], and [O iii], photoionization by the central QSO is likely the dominant ionization mechanism rather than shocks caused by radio jets. On the other hand, the spectral energy distribution of the host galaxy is well characterized as a quiescent galaxy that has shut down star formation several hundred Myr ago. Our results suggest a scenario that QSOs are powered after the shutdown of the star formation and help complete the quenching of massive quiescent galaxies at high redshift.

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  35. ALMA Reveals Extended Cool Gas and Hot Ionized Outflows in a Typical Star-forming Galaxy at Z = 7.13 Reviewed

    Hollis B. Akins, Seiji Fujimoto, Kristian Finlator, Darach Watson, Kirsten K. Knudsen, Johan Richard, Tom J.L. Tom, Takuya Hashimoto, Akio K. Inoue, Hiroshi Matsuo, Michał J. Michałowski, Yoichi Tamura

    Astrophysical Journal   Vol. 934 ( 1 ) page: 64   2022.7

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    We present spatially resolved morphological properties of [C II] 158 μm, [O III] 88 μm, dust, and rest-frame ultraviolet (UV) continuum emission for A1689-zD1, a strongly lensed, sub-L* galaxy at z = 7.13, by utilizing deep Atacama Large Millimeter/submillimeter Array (ALMA) and Hubble Space Telescope (HST) observations. While the [O III] line and UV continuum are compact, the [C II] line is extended up to a radius of r ∼ 12 kpc. Using multi-band rest-frame far-infrared continuum data ranging from 52 to 400 μm, we find an average dust temperature and emissivity index of T dust = 41 − 14 + 17 K and β = 1.7 − 0.7 + 1.1 , respectively, across the galaxy. We find slight differences in the dust continuum profiles at different wavelengths, which may indicate that the dust temperature decreases with distance. We map the star formation rate (SFR) via IR and UV luminosities and determine a total SFR of 37 ± 1M ⊙yr−1 with an obscured fraction of 87%. While the [O III] line is a good tracer of the SFR, the [C II] line shows deviation from the local L [C II]-SFR relations in the outskirts of the galaxy. Finally, we observe a clear difference in the line profile between [C II] and [O III], with significant residuals (∼5σ) in the [O III] line spectrum after subtracting a single Gaussian model. This suggests a possible origin of the extended [C II] structure from the cooling of hot ionized outflows. The extended [C II] and high-velocity [O III] emission may both contribute in part to the high L [O III]/L [C II] ratios recently reported in z > 6 galaxies.

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  36. High-resolution ALMA Study of CO J = 2–1 Line and Dust Continuum Emissions in Cluster Galaxies at z = 1.46 Reviewed

    Ryota Ikeda, Ken-ichi Tadaki, Daisuke Iono, Tadayuki Kodama, Jeffrey C. C. Chan, Bunyo Hatsukade, Masao Hayashi, Takuma Izumi, Kotaro Kohno, Yusei Koyama, Rhythm Shimakawa, Tomoko L. Suzuki, Yoichi Tamura, Ichi Tanaka

    The Astrophysical Journal   Vol. 933 ( 1 ) page: 11 - 11   2022.7

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    We present new Atacama Large Millimeter/submillimeter Array (ALMA) results obtained from spatially resolved CO J = 2–1 line (0.″4 resolution) and 870 μm continuum (0.″2 resolution) observations of cluster galaxies in XMMXCS J2215.9-1738 at z = 1.46. Our sample comprises 17 galaxies within ∼0.5 Mpc (0.6R<sub>200</sub>) of the cluster center, all of which have previously been detected in the CO J = 2–1 line at a lower resolution. The effective radii of both the CO J = 2–1 line and 870 μm dust continuum emissions are robustly measured for nine galaxies by modeling the visibilities. We find that the CO J = 2–1 line emission in all of the nine galaxies is more extended than the dust continuum emission by a factor of 2.8 ± 1.4. We investigate the spatially resolved Kennicutt–Schmidt (KS) relation in two regions within the interstellar medium of the galaxies. The relation for our sample reveals that the central region (0 &lt; r &lt; R<sub>e,870μm</sub>) of galaxies tends to have a shorter gas depletion timescale, i.e., a higher star formation efficiency, compared to the extended region (R<sub>e,870μm</sub> &lt; r &lt; R<sub>e,CO</sub>). Overall, our result suggests that star formation activities are concentrated inside the extended gas reservoir, possibly resulting in the formation of a bulge structure. We find consistency between the ALMA 870 μm radii of star-forming members and the Hubble Space Telescope/1.6 μm radii of passive members in a mass–size distribution, which suggests a transition from star-forming to passive members within ∼0.5 Gyr. In addition, no clear differences in the KS relation nor in the sizes are found between galaxies with and without a close companion.

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  37. Possible Systematic Rotation in the Mature Stellar Population of a <i>z</i>=9.1 Galaxy

    Tokuoka Tsuyoshi, Inoue Akio K., Hashimoto Takuya, Ellis Richard S., Laporte Nicolas, Sugahara Yuma, Matsuo Hiroshi, Tamura Yoichi, Fudamoto Yoshinobu, Moriwaki Kana, Roberts-Borsani Guido, Shimizu Ikkoh, Yamanaka Satoshi, Yoshida Naoki, Zackrisson Erik, Zheng Wei

    ASTROPHYSICAL JOURNAL LETTERS   Vol. 933 ( 1 )   2022.7

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  38. Detection of nitrogen and oxygen in a galaxy at the end of reionization Reviewed

    Ken-ichi Tadaki, Akiyoshi Tsujita, Yoichi Tamura, Kotaro Kohno, Bunyo Hatsukade, Daisuke Iono, Minju M Lee, Yuichi Matsuda, Tomonari Michiyama, Tohru Nagao, Kouichiro Nakanishi, Yuri Nishimura, Toshiki Saito, Hideki Umehata, Jorge Zavala

    Publications of the Astronomical Society of Japan   Vol. 74 ( 3 ) page: L9 - L16   2022.6

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    We present observations of [N ii] 205 μm, [O iii] 88 μm, and dust emission in a strongly-lensed, submillimeter galaxy (SMG) at z = 6.0, G09.83808, with the Atacama Large Millimeter/submillimeter Array (ALMA). Both [N ii] and [O iii] line emissions are detected at &amp;gt;12σ in the ${0{^{\prime \prime}_{. } }8}$-resolution maps. Lens modeling indicates that the spatial distribution of the dust continuum emission is well characterized by a compact disk with an effective radius of 0.64 ± 0.02 kpc and a high infrared surface brightness of ΣIR = (1.8 ± 0.3) × 1012 L⊙ kpc−2. This result supports that G09.83808 is the progenitor of compact quiescent galaxies at z ∼ 4, where the majority of its stars are expected to be formed through a strong and short burst of star formation. G09.83808 and other lensed SMGs show a decreasing trend in the [N ii] line to infrared luminosity ratio with increasing continuum flux density ratio between 63 and 158 μm, as seen in local luminous infrared galaxies (LIRGs). The decreasing trend can be reproduced by photoionization models with increasing ionization parameters. Furthermore, by combining the [N ii]/[O iii] luminosity ratio with far-infrared continuum flux density ratio in G09.83808, we infer that the gas phase metallicity is already Z ≈ 0.5–0.7 Z⊙. G09.83808 is likely one of the earliest galaxies that has been chemically enriched at the end of reionization.

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  39. Properties of molecular gas in galaxies in early and mid stages of Interaction. III. Resolved Kennicutt–Schmidt law Invited Reviewed

    Hiroyuki Kaneko, Nario Kuno, Daisuke Iono, Yoichi Tamura, Tomoka Tosaki, Kouichiro Nakanishi, Tsuyoshi Sawada

    Publications of the Astronomical Society of Japan   Vol. 74 ( 2 ) page: 343 - 363   2022.4

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  40. The bright extragalactic ALMA redshift survey (BEARS) I: Redshifts of bright gravitationally lensed galaxies from the Herschel ATLAS

    Urquhart S.A., Bendo G.J., Serjeant S., Bakx T., Hagimoto M., Cox P., Neri R., Lehnert M., Sedgwick C., Weiner C., Dannerbauer H., Amvrosiadis A., Andreani P., Baker A.J., Beelen A., Berta S., Borsato E., Buat V., Butler K.M., Cooray A., De Zotti G., Dunne L., Dye S., Eales S., Enia A., Fan L., Gavazzi R., González-Nuevo J., Harris A.I., Herrera C.N., Hughes D., Ismail D., Ivison R., Jin S., Jones B., Kohno K., Krips M., Lagache G., Marchetti L., Massardi M., Messias H., Negrello M., Omont A., Perez-Fournon I., Riechers D.A., Scott D., Smith M.W.L., Stanley F., Tamura Y., Temi P., Vlahakis C., Weiß A., Van Der Werf P., Verma A., Yang C., Young A.J.

    Monthly Notices of the Royal Astronomical Society   Vol. 511 ( 2 ) page: 3017 - 3033   2022.4

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    We present spectroscopic measurements for 71 galaxies associated with 62 of the brightest high-redshift submillimetre sources from the Southern fields of the Herschel Astrophysical Terahertz Large Area Survey (H-ATLAS), while targeting 85 sources which resolved into 142. We have obtained robust redshift measurements for all sources using the 12-m Array and an efficient tuning of ALMA to optimize its use as a redshift hunter, with 73 per cent of the sources having a robust redshift identification. Nine of these redshift identifications also rely on observations from the Atacama Compact Array. The spectroscopic redshifts span a range 1.41 < z < 4.53 with a mean value of 2.75, and the CO emission line full-width at half-maxima range between 110, km, s-1 < FWHM < 1290, km, s-1 with a mean value of ∼500 km s-1, in line with other high-z samples. The derived CO(1-0) luminosity is significantly elevated relative to line-width to CO(1-0) luminosity scaling relation, which is suggestive of lensing magnification across our sources. In fact, the distribution of magnification factors inferred from the CO equivalent widths is consistent with expectations from galaxy-galaxy lensing models, though there is a hint of an excess at large magnifications that may be attributable to the additional lensing optical depth from galaxy groups or clusters.

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  41. A Search for H-Dropout Lyman Break Galaxies at z ∼ 12–16 Reviewed

    Yuichi Harikane, Akio K. Inoue, Ken Mawatari, Takuya Hashimoto, Satoshi Yamanaka, Yoshinobu Fudamoto, Hiroshi Matsuo, Yoichi Tamura, Pratika Dayal, L. Y. Aaron Yung, Anne Hutter, Fabio Pacucci, Yuma Sugahara, Anton M. Koekemoer

    The Astrophysical Journal   Vol. 929 ( 1 ) page: 1 - 1   2022.4

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    We present two bright galaxy candidates at z ∼ 12–13 identified in our H-dropout Lyman break selection with 2.3 deg<sup>2</sup> near-infrared deep imaging data. These galaxy candidates, selected after careful screening of foreground interlopers, have spectral energy distributions showing a sharp discontinuity around 1.7 μm, a flat continuum at 2–5 μm, and nondetections at &lt;1.2 μm in the available photometric data sets, all of which are consistent with a z &gt; 12 galaxy. An ALMA program targeting one of the candidates shows a tentative 4σ [O iii] 88 μm line at z = 13.27, in agreement with its photometric redshift estimate. The number density of the z ∼ 12–13 candidates is comparable to that of bright z ∼ 10 galaxies and is consistent with a recently proposed double-power-law luminosity function rather than the Schechter function, indicating little evolution in the abundance of bright galaxies from z ∼ 4 to 13. Comparisons with theoretical models show that the models cannot reproduce the bright end of rest-frame ultraviolet luminosity functions at z ∼ 10–13. Combined with recent studies reporting similarly bright galaxies at z ∼ 9–11 and mature stellar populations at z ∼ 6–9, our results indicate the existence of a number of star-forming galaxies at z &gt; 10, which will be detected with upcoming space missions such as the James Webb Space Telescope, Nancy Grace Roman Space Telescope, and GREX-PLUS.

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  42. TiEMPO: open-source time-dependent end-to-end model for simulating ground-based submillimeter astronomical observations

    Huijten Esmee, Roelvink Yannick, Brackenhoff Stefanie A., Taniguchi Akio, Bakx Tom J. L. C., Marthi Kaushal B., Zaalberg Stan, Doing Anne-Kee, Baselmans Jochem J. A., Chin Kah Wuy, Huiting Robert, Karatsu Kenichi, Laguna Alejandro Pascual, Tamura Yoichi, Takekoshi Tatsuya, Yates Stephen J. C., van Hoven Maarten, Endo Akira

    JOURNAL OF ASTRONOMICAL TELESCOPES INSTRUMENTS AND SYSTEMS   Vol. 8 ( 2 )   2022.4

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    The next technological breakthrough in millimeter–submillimeter astronomy is three-dimensional imaging spectrometry with wide instantaneous spectral bandwidths and wide fields of view. The total optimization of the focal-plane instrument, the telescope, the observing strategy, and the signal-processing software must enable efficient removal of foreground emission from the Earth’s atmosphere, which is time-dependent and highly nonlinear in frequency. Here, we present Time-dependent End-to-end Model for Post-process Optimization (TiEMPO) of the DEep Spectroscopic HIgh-redshift MApper (DESHIMA) spectrometer. TiEMPO utilizes a dynamical model of the atmosphere and parameterized models of the astronomical source, the telescope, the instrument, and the detector. The output of TiEMPO is a time stream of sky brightness temperature and detected power, which can be analyzed by standard signal-processing software. We first compare TiEMPO simulations with an on-sky measurement by the wideband DESHIMA spectrometer, and find good agreement in the noise and sensitivity. We then use TiEMPO to simulate the detection of the line emission spectrum of a high-redshift galaxy using the DESHIMA 2.0 spectrometer in development. The TiEMPO model is open source. Its modular and parametrized design enables users to adapt it to optimize the end-to-end performance of spectroscopic and photometric instruments on existing and future telescopes

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  43. The Kiloparsec-scale Neutral Atomic Carbon Outflow in the Nearby Type 2 Seyfert Galaxy NGC 1068: Evidence for Negative AGN Feedback Reviewed

    Toshiki Saito, Shuro Takano, Nanase Harada, Taku Nakajima, Eva Schinnerer, Daizhong Liu, Akio Taniguchi, Takuma Izumi, Yumi Watanabe, Kazuharu Bamba, Eric Herbst, Kotaro Kohno, Yuri Nishimura, Sophia Stuber, Yoichi Tamura, Tomoka Tosaki

    The Astrophysical Journal Letters   Vol. 927 ( 2 ) page: L32 - L32   2022.3

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    Active galactic nucleus (AGN) feedback is postulated as a key mechanism for regulating star formation within galaxies. Studying the physical properties of the outflowing gas from AGNs is thus crucial for understanding the coevolution of galaxies and supermassive black holes. Here we report 55 pc resolution ALMA neutral atomic carbon [C i] <sup>3</sup>P<sub>1</sub>−<sup>3</sup>P<sub>0</sub> observations toward the central 1 kpc of the nearby Type 2 Seyfert galaxy NGC 1068, supplemented by 55 pc resolution CO(J = 1−0) observations. We find that [C i] emission within the central kiloparsec is strongly enhanced by a factor of &gt;5 compared to the typical [C i]/CO intensity ratio of ∼0.2 for nearby starburst galaxies (in units of brightness temperature). The most [C i]-enhanced gas (ratio &gt; 1) exhibits a kiloparsec-scale elongated structure centered at the AGN that matches the known biconical ionized gas outflow entraining molecular gas in the disk. A truncated, decelerating bicone model explains well the kinematics of the elongated structure, indicating that the [C i] enhancement is predominantly driven by the interaction between the ISM in the disk and the highly inclined ionized gas outflow (which is likely driven by the radio jet). Our results strongly favor the “CO dissociation scenario” rather than the “in situ C formation” one, which prefers a perfect bicone geometry. We suggest that the high-[C i]/CO intensity ratio gas in NGC 1068 directly traces ISM in the disk that is currently dissociated and entrained by the jet and the outflow, i.e., the “negative” effect of the AGN feedback.

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  44. Properties of molecular gas in galaxies in early and mid stages of Interaction. III. Resolved Kennicutt-Schmidt law

    Kaneko Hiroyuki, Kuno Nario, Iono Daisuke, Tamura Yoichi, Tosaki Tomoka, Nakanishi Kouichiro, Sawada Tsuyoshi

    PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN     2022.2

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  45. Characterization of sensitivity and responses of a 2-element prototype wavefront sensor for millimeter-wave adaptive optics attached to the Nobeyama 45 m telescope

    Satoya Nakano, Yoichi Tamura, Akio Taniguchi, Sachiko K. Okumura, Ryohei Kawabe, Nozomi Okada, Tomoko Nakamura, Yuhei Fukasaku

    Adaptive Optics Systems VIII   Vol. 12185   page: 121856Z   2022

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  46. Development status of TAO/MIMIZUKU: performance test of the near-infrared channel

    Takafumi Kamizuka, Takashi Miyata, Shigeyuki Sako, Ryou Ohsawa, Kentaro Asano, Atsushi Nishimura, Kengo Tachibana, Tsubasa Michifuji, Hirokazu Iida, Akira C. Naruse, Mizuho Uchiyama, Itsuki Sakon, Takashi Onaka, Hirokazu Kataza, Sunao Hasegawa, Fumihiko Usui, Naruhisa Takato, Noboru Ebizuka, Takuya Hosobata, Tsutomu Aoki, Mamoru Doi, Fumi Egusa, Bunyo Hatsukade, Natsuko Kato, Kotaro Kohno, Masahiro Konishi, Shintaro Koshida, Shuhei Koyama, Takeo Minezaki, Tomoki Morokuma, Kentaro Motohara, Mizuki Numata, Hiroaki Sameshima, Hidenori Takahashi, Yoichi Tamura, Toshihiko Tanabe, Masuo Tanaka, Kosuke Kushibiki, Nuo Chen, Shogo Homan, Yuzuru Yoshii

    Ground-based and Airborne Instrumentation for Astronomy IX   Vol. 12184   2022

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  47. Big Three Dragons: A [N ii] 122 μm Constraint and New Dust-continuum Detection of a z = 7.15 Bright Lyman-break Galaxy with ALMA

    Yuma Sugahara, Akio K. Inoue, Takuya Hashimoto, Satoshi Yamanaka, Seiji Fujimoto, Yoichi Tamura, Hiroshi Matsuo, Christian Binggeli, Erik Zackrisson

    The Astrophysical Journal   Vol. 923 ( 1 )   2021.12

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    We present new Atacama Large Millimeter/submillimeter Array Band 7 observational results of a Lyman-break galaxy at z = 7.15, B14-65666 ("Big Three Dragons"), which is an object detected in [O III] 88 mu m, [CII] 158 mu m, and dust continuum emission during the epoch of reionization. Our targets are the [N II] 122 mu m fine-structure emission line and the underlying 120 mu m dust continuum. The dust continuum is detected with a similar to 19 sigma significance. From far-infrared spectral energy distribution sampled at 90, 120, and 160 mu m, we obtain a best-fit dust temperature of 40 K (79 K) and an infrared luminosity of log(10)(L-IR/L-circle dot)=11.6 <i (12.1) at the emissivity index beta = 2.0 (1.0). The [N II] 122 mu m line is not detected. The 3 sigma upper limit of the [N II] luminosity is 8.1 x 10(7) L-circle dot. From the [N II], [O III], and [C II] line luminosities, we use the Cloudy photoionization code to estimate nebular parameters as functions of metallicity. If the metallicity of the galaxy is high (Z > 0.4 Z(circle dot)), the ionization parameter and hydrogen density are log(10)U similar or equal to-2.7 +/- 0.1 n(H) similar or equal to 50-250 cm(-3), respectively, which are comparable to those measured in low-redshift galaxies. The nitrogen-to-oxygen abundance ratio, N/O, is constrained to be subsolar. At Z < 0.4 Z(circle dot), the allowed U drastically increases as the assumed metallicity decreases. For high ionization parameters, the N/O constraint becomes weak. Finally, our Cloudy models predict the location of B14-65666 on the BPT diagram, thereby allowing a comparison with low-redshift galaxies.

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  48. A VLA Survey of Late-time Radio Emission from Superluminous Supernovae and the Host Galaxies

    Bunyo Hatsukade, Nozomu Tominaga, Tomoki Morokuma, Kana Morokuma-Matsui, Yuichi Matsuda, Yoichi Tamura, Kotaro Niinuma, Kazuhiro Motogi

    The Astrophysical Journal   Vol. 922 ( 1 )   2021.11

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  49. Accurate dust temperature determination in a z = 7.13 galaxy

    Tom J.L.C. Bakx, Laura Sommovigo, Stefano Carniani, Andrea Ferrara, Hollis B. Akins, Seiji Fujimoto, Masato Hagimoto, Kirsten K. Knudsen, Andrea Pallottini, Yoichi Tamura, Darach Watson

    Monthly Notices of the Royal Astronomical Society: Letters   Vol. 508 ( 1 ) page: L58 - L63   2021.11

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    We report ALMA Band 9 continuum observations of the normal, dusty star-forming galaxy A1689-zD1 at z = 7.13, resulting in a ∼4.6 σ detection at 702 GHz. For the first time, these observations probe the far-infrared spectrum shortward of the emission peak of a galaxy in the Epoch of Reionization (EoR). Together with ancillary data from earlier works, we derive the dust temperature, Td, and mass, Md, of A1689-zD1 using both traditional modified blackbody spectral energy density fitting, and a new method that relies only on the [C ii] 158 μm line and underlying continuum data. The two methods give Td = (42+13-7, 40+13-) K, and Md} = (1.7+1.3-0.7, 2.0+1.8-1.0), ×, 107, M⊙. Band 9 observations improve the accuracy of the dust temperature (mass) estimate by ∼50 per cent (6 times). The derived temperatures confirm the reported increasing Td-redshift trend between z = 0 and 8; the dust mass is consistent with a supernova origin. Although A1689-zD1 is a normal UV-selected galaxy, our results, implying that ∼85 per cent of its star-formation rate is obscured, underline the non-negligible effects of dust in EoR galaxies.

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  50. Accurate dust temperature determination in a z = 7.13 galaxy

    Bakx Tom J L C, Sommovigo Laura, Carniani Stefano, Ferrara Andrea, Akins Hollis B, Fujimoto Seiji, Hagimoto Masato, Knudsen Kirsten K, Pallottini Andrea, Tamura Yoichi, Watson Darach

    Monthly Notices of the Royal Astronomical Society: Letters   Vol. 508 ( 1 ) page: L58 - L63   2021.11

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    We report ALMA Band 9 continuum observations of the normal, dusty star-forming galaxy A1689-zD1 at z = 7.13, resulting in a ∼4.6 σ detection at 702 GHz. For the first time, these observations probe the far-infrared spectrum shortward of the emission peak of a galaxy in the Epoch of Reionization (EoR). Together with ancillary data from earlier works, we derive the dust temperature, Td, and mass, Md, of A1689-zD1 using both traditional modified blackbody spectral energy density fitting, and a new method that relies only on the [C ii] 158 μm line and underlying continuum data. The two methods give Td=(42^+13−7,40^+13−7⁠) K, and Md=(1.7^+1.3−0.7,2.0^+1.8−1.0)×10^7M⊙⁠. Band 9 observations improve the accuracy of the dust temperature (mass) estimate by ∼50 per cent (6 times). The derived temperatures confirm the reported increasing Td-redshift trend between z = 0 and 8; the dust mass is consistent with a supernova origin. Although A1689-zD1 is a normal UV-selected galaxy, our results, implying that ∼85 per cent of its star-formation rate is obscured, underline the non-negligible effects of dust in EoR galaxies.

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  51. A data-scientific noise-removal method for efficient submillimeter spectroscopy with single-dish telescopes

    Akio Taniguchi, Yoichi Tamura, Shiro Ikeda, Tatsuya Takekoshi, Ryohei Kawabe

    Astronomical Journal   Vol. 162 ( 3 )   2021.9

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    For submillimeter spectroscopy with ground-based single-dish telescopes, removing the noise contribution from the Earth's atmosphere and the instrument is essential. For this purpose, here we propose a new method based on a data-scientific approach. The key technique is statistical matrix decomposition that automatically separates the signals of astronomical emission lines from the drift noise components in the fast-sampled (1-10 Hz) time-series spectra obtained by a position-switching (PSW) observation. Because the proposed method does not apply subtraction between two sets of noisy data (i.e., on-source and off-source spectra), it improves the observation sensitivity by a factor of 2 . It also reduces artificial signals such as baseline ripples on a spectrum, which may also help to improve the effective sensitivity. We demonstrate this improvement by using the spectroscopic data of emission lines toward a high-redshift galaxy observed with a 2 mm receiver on the 50 m Large Millimeter Telescope. Since the proposed method is carried out offline and no additional measurements are required, it offers an instant improvement on the spectra reduced so far with the conventional method. It also enables efficient deep spectroscopy driven by the future 50 m class large submillimeter single-dish telescopes, where fast PSW observations by mechanical antenna or mirror drive are difficult to achieve.

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  52. ALMA observations of Lyα blob 1: Multiple major mergers and widely distributed interstellar media

    Hideki Umehata, Ian Smail, Charles C. Steidel, Matthew Hayes, Douglas Scott, A. M. Swinbank, R. J. Ivison, Toru Nagao, Mariko Kubo, Kouichiro Nakanishi, Yuichi Matsuda, Soh Ikarashi, Yoichi Tamura, J. E. Geach

    Astrophysical Journal   Vol. 918 ( 2 )   2021.9

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    We present observations of a giant Lyα blob (LAB) in the SSA22 protocluster at z = 3.1, SSA22-LAB1, taken with the Atacama Large Millimeter/submillimeter Array. Dust continuum, along with [C II] 158 μm and CO(4–3) line emission have been detected in LAB1, showing complex morphology and kinematics across a ∼100 kpc central region. Seven galaxies at z = 3.0987–3.1016 in the surroundings are identified in [C II] and dust continuum emission, with two of them potential companions or tidal structures associated with the most massive galaxies. Spatially resolved [C II] and infrared luminosity ratios for the widely distributed media (L[CII]/LIR ≈ 10-2-10-3) suggest that the observed extended interstellar media are likely to have originated from star formation activity and the contribution from shocked gas is probably not dominant. LAB1 is found to harbor a total molecular gas mass Mmol = (8.7 ± 2.0) × 1010 Me, concentrated in the core region of the Lyα-emitting area. While (primarily obscured) star formation activity in the LAB1 core is one of the most plausible power sources for the Lyα emission, multiple major mergers found in the core may also play a role in making LAB1 exceptionally bright and extended in Lyα as a result of cooling radiation induced by gravitational interactions.

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  53. A Massive Quiescent Galaxy Confirmed in a Protocluster at z = 3.09

    Mariko Kubo, Hideki Umehata, Yuichi Matsuda, Masaru Kajisawa, Charles C. Steidel, Toru Yamada, Ichi Tanaka, Bunyo Hatsukade, Yoichi Tamura, Kouichiro Nakanishi, Kotaro Kohno, Kianhong Lee, Keiichi Matsuda

    The Astrophysical Journal   Vol. 919 ( 1 ) page: 6 - 6   2021.9

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    We report a massive quiescent galaxy at zspec= -3.0922+0.008-0.004 spectroscopically confirmed at a protocluster in the SSA22 field by detecting the Balmer and Ca II absorption features with the multi-object spectrometer for infrared exploration on the Keck I telescope. This is the most distant quiescent galaxy confirmed in a protocluster to date. We fit the optical to mid-infrared photometry and spectrum simultaneously with spectral energy distribution (SED) models of parametric and nonparametric star formation histories (SFHs). Both models fit the observed SED well and confirm that this object is a massive quiescent galaxy with a stellar mass of log (M∗/M⊙=11.26+0.03-0.04 and 11.54+0.03-0.00 and a star formation rate of SFR/M⊙ yr-1 < 0.3 and = -0.01+0.03-0.01 for parametric and nonparametric models, respectively. The SFH from the former modeling is described as an instantaneous starburst whereas that of the latter modeling is longer-lived, but both models agree with a sudden quenching of the star formation at ~0.6 Gyr ago. This massive quiescent galaxy is confirmed in an extremely dense group of galaxies predicted as a progenitor of a brightest cluster galaxy formed via multiple mergers in cosmological numerical simulations. We discover three new plausible [O III]λ5007 emitters at 3.0791 ≤ zspec ≤ 3.0833 serendipitously detected around the target. Two of them just between the target and its nearest massive galaxy are possible evidence of their interactions. They suggest the future great size and stellar mass evolution of this massive quiescent galaxy via mergers.

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  54. Physical Characterization of Serendipitously Uncovered Millimeter-wave Line-emitting Galaxies at z ∼ 2.5 behind the Local Luminous Infrared Galaxy VV 114

    Shoichiro Mizukoshi, Kotaro Kohno, Fumi Egusa, Bunyo Hatsukade, Takeo Minezaki, Toshiki Saito, Yoichi Tamura, Daisuke Iono, Junko Ueda, Yuichi Matsuda, Ryohei Kawabe, Minju M. Lee, Min S. Yun, Daniel Espada

    The Astrophysical Journal   Vol. 917 ( 2 )   2021.8

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    We present a detailed investigation of millimeter-wave line emitters ALMA J010748.3-173028 (ALMA-J0107a) and ALMA J010747.0-173010 (ALMA-J0107b), which were serendipitously uncovered in the background of the nearby galaxy VV 114 with spectral scan observations at λ = 2-3 mm. Via Atacama Large Millimeter/submillimeter Array (ALMA) detection of CO(4-3), CO(3-2), and [C i](1-0) lines for both sources, their spectroscopic redshifts are unambiguously determined to be z = 2.4666 0.0002 and z = 2.3100 0.0002, respectively. We obtain the apparent molecular gas masses M gas of these two line emitters from [C i] line fluxes as (11.2 3.1) 1010 M o˙ and (4.2 1.2) 1010 M o˙, respectively. The observed CO(4-3) velocity field of ALMA-J0107a exhibits a clear velocity gradient across the CO disk, and we find that ALMA-J0107a is characterized by an inclined rotating disk with a significant turbulence, that is, a deprojected maximum rotation velocity to velocity dispersion ratio of 1.3 0.3. We find that the dynamical mass of ALMA-J0107a within the CO-emitting disk computed from the derived kinetic parameters, (1.1 0.2) 1010 M o˙, is an order of magnitude smaller than the molecular gas mass derived from dust continuum emission, (3.2 1.6) 1011 M o˙. We suggest this source is magnified by a gravitational lens with a magnification of μ ⪆ 10, which is consistent with the measured offset from the empirical correlation between CO-line luminosity and width.

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  55. J-GEM optical and near-infrared follow-up of gravitational wave events during LIGO's and Virgo's third observing run

    Sasada Mahito, Utsumi Yousuke, Itoh Ryosuke, Tominaga Nozomu, Tanaka Masaomi, Morokuma Tomoki, Yanagisawa Kenshi, Kawabata Koji S., Ohgami Takayuki, Yoshida Michitoshi, Abe Fumio, Adachi Ryo, Akitaya Hiroshi, Chong Yang, Daikuhara Kazuki, Hamasaki Ryo, Honda Satoshi, Hosokawa Ryohei, Iida Kota, Imazato Fumiya, Ishioka Chihiro, Iwasaki Takumi, Jian Mingjie, Kamei Yuhei, Kanai Takahiro, Kaneda Hidehiro, Kaneko Ayane, Katoh Noriyuki, Kawai Nobuyuki, Kubota Keiichiro, Kubota Yuma, Mamiya Hideo, Matsubayashi Kazuya, Morihana Kumiko, Murata Katsuhiro L., Nagayama Takahiro, Nakamura Noriatsu, Nakaoka Tatsuya, Niino Yuu, Nishinaka Yuki, Niwano Masafumi, Nogami Daisaku, Oasa Yumiko, Oeda Miki, Ogawa Futa, Ohsawa Ryou, Ohta Kouji, Oide Kohei, Onozato Hiroki, Sako Shigeyuki, Saito Tomoki, Sekiguchi Yuichiro, Shigeyama Toshikazu, Shigeyoshi Takumi, Shikauchi Minori, Shiraishi Kazuki, Suzuki Daisuke, Takagi Kengo, Takahashi Jun, Takarada Takuya, Takayama Masaki, Takeuchi Himeka, Tamura Yasuki, Tanaka Ryoya, Toma Sayaka, Tozuka Miyako, Uchida Nagomi, Uzawa Yoshinori, Yamanaka Masayuki, Yasuda Moeno, Yatsu Yoichi

    PROGRESS OF THEORETICAL AND EXPERIMENTAL PHYSICS   Vol. 2021 ( 5 )   2021.5

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    The Laser Interferometer Gravitational-wave Observatory Scientific Collaboration and Virgo Collaboration (LVC) sent out 56 gravitational-wave (GW) notices during the third observing run (O3). The Japanese Collaboration for Gravitational wave ElectroMagnetic follow-up (J-GEM) performed optical and near-infrared observations to identify and observe an electromagnetic (EM) counterpart. We constructed a web-based system that enabled us to obtain and share information on candidate host galaxies for the counterpart, and the status of our observations. Candidate host galaxies were selected from the GLADE catalog with a weight based on the 3D GW localization map provided by LVC. We conducted galaxy-targeted and wide-field blind surveys, real-time data analysis, and visual inspection of observed galaxies. We performed galaxy-targeted follow-ups to 23 GW events during O3, and the maximum probability covered by our observations reached 9.8%. Among these, we successfully started observations for 10 GW events within 0.5 days after the detection. This result demonstrates that our follow-up observation has the potential to constrain EM radiation models for a merger of binary neutron stars at a distance of up to ∼100 Mpc with a probability area of ≤ 500 deg 2.

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  56. Variability of Late-time Radio Emission in the Superluminous Supernova PTF10hgi

    B. Hatsukade, N. Tominaga, T. Morokuma, K. Morokuma-Matsui, Y. Tamura, K. Niinuma, M. Hayashi, Y. Matsuda, K. Motogi

    The Astrophysical Journal Letters   Vol. 911 ( 1 ) page: L1 - L1   2021.4

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    We report the time variability of the late-time radio emission in a Type I superluminous supernova (SLSN), PTF10hgi, at z = 0.0987. The Karl G. Jansky Very Large Array 3 GHz observations at 8.6 and 10 yr after the explosion both detected radio emission with a ∼40% decrease in flux density in the second epoch. This is the first report of a significant variability of the late-time radio light curve in an SLSN. Through combination with previous measurements in two other epochs, we constrained both the rise and decay phases of the radio light curve over three years, peaking at approximately 8-9 yr after the explosion with a peak luminosity of L3 GHz = 2 &times; 1021WHz-1. Possible scenarios for the origin of the variability are an active galactic nucleus (AGN) in the host galaxy, an afterglow caused by the interaction between an off-axis jet and circumstellar medium, and a wind nebula powered by a newly born magnetar. Comparisons with models show that the radio light curve can be reproduced by both the afterglow model and magnetar wind nebula model. Considering the flat radio spectrum at 1-15 GHz and an upper limit at 0.6 GHz obtained in previous studies, plausible scenarios are a low-luminosity flat-spectrum AGN or a magnetar wind nebula with a shallow injection spectral index. &copy; 2021 The American Astronomical Society. All rights reserved.

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  57. Revisited Cold Gas Content with Atomic Carbon [C I] in z = 2.5 Protocluster Galaxies Reviewed

    Minju M. Lee, Ichi Tanaka, Daisuke Iono, Ryohei Kawabe, Tadayuki Kodama, Kotaro Kohno, Toshiki Saito, Yoichi Tamura

    The Astrophysical Journal   Vol. 909 ( 2 ) page: 181 - 181   2021.3

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    We revisit the cold gas contents of galaxies in a protocluster at z = 2.49 using the lowest neutral atomic carbon transition [C i] 3 P 1 - 3 P 0 from Atacama Large Millimeter/submillimeter Array observations. We aim to test if the same gas-mass calibration adopted in field galaxies can be applied to protocluster galaxies. Five galaxies out of 16 targeted galaxies are detected in the [C i] line, and these are all previously detected in CO (3-2) and CO (4-3) and three in 1.1 mm dust continuum. We investigate the line luminosity relations between CO and [C i] in the protocluster and compare with other previous studies. We then compare the gas mass based on three gas tracers of [C i], CO(3-2), and dust if at least one of the last two tracers are available. Using the calibration adopted for field main-sequence galaxies, the [C i]-based gas measurements are lower than or comparable to the CO-based gas measurements by -0.35 dex at the lowest with the mean deviation of -0.14 dex. The differences between [C i]- and the dust- based measurements are relatively mild by up to 0.16 dex with the mean difference of 0.02 dex. Taking these all together with calibration uncertainties, with the [C i] line, we reconfirm our previous findings that the mean gas fraction is comparable to field galaxies for a stellar-mass range of . However, at least for these secure five detections, the depletion timescale decreases more rapidly with stellar mass than field galaxies that might be related to earlier quenching in dense environments.

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  58. A puzzling non-detection of [O III] and [C II] from a z ≈ 7.7 galaxy observed with ALMA Reviewed

    C. Binggeli, A. K. Inoue, T. Hashimoto, M. C. Toribio, E. Zackrisson, S. Ramstedt, K. Mawatari, Y. Harikane, H. Matsuo, T. Okamoto, K. Ota, I. Shimizu, Y. Tamura, Y. Taniguchi, H. Umehata

    Astronomy & Astrophysics   Vol. 646   page: A26 - A26   2021.2

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    <italic>Context.</italic> Characterizing the galaxy population in the early Universe holds the key to understanding the evolution of these objects and the role they played in cosmic reionization. However, there have been very few observations at the very highest redshifts to date.


    <italic>Aims.</italic> In order to shed light on the properties of galaxies in the high-redshift Universe and their interstellar media, we observe the Lyman-<italic>α</italic> emitting galaxy <ext-link ext-link-type="aoi">z7_GSD_3811</ext-link> at <italic>z</italic> = 7.664 with bands 6 and 8 at the Atacama Large Millimeter/submillimeter Array (ALMA).


    <italic>Methods.</italic> We target the far-infrared [O <sc>III</sc>] 88 <italic>μ</italic>m and [C <sc>II</sc>] 158 <italic>μ</italic>m emission lines and dust continuum in the star-forming galaxy z7_GSD_3811 with ALMA. We combine these measurements with earlier observations in the rest-frame ultraviolet (UV) in order to characterize the object and compare the results to those of earlier studies that observed [O <sc>III</sc>] and [C <sc>II</sc>] emission in high-redshift galaxies.


    <italic>Results.</italic> The [O <sc>III</sc>] 88 <italic>μ</italic>m and [C <sc>II</sc>] 158 <italic>μ</italic>m emission lines are undetected at the position of z7_GSD_3811, with 3<italic>σ</italic> upper limits of 1.6  ×  10<sup>8</sup> <italic>L</italic><sub>⊙</sub> and 4.0  ×  10<sup>7</sup> <italic>L</italic><sub>⊙</sub>, respectively. We do not detect any dust continuum in band 6 nor band 8. The measured rms in the band 8 and band 6 continua are 26 and 9.9 <italic>μ</italic>Jy beam<sup>−1</sup>, respectively. Similar to several other high-redshift galaxies, z7_GSD_3811 exhibits low [C <sc>II</sc>] emission for its star formation rate compared to local galaxies. Furthermore, our upper limit on the [O <sc>III</sc>] line luminosity is lower than the previously observed [O <sc>III</sc>] lines in high-redshift galaxies with similar UV luminosities. Our ALMA band 6 and 8 dust continuum observations imply that z7_GSD_3811 likely has a low dust content, and our non-detections of the [O <sc>III</sc>] and [C <sc>II</sc>] lines could indicate that z7_GSD_3811 has a low metallicity (<italic>Z</italic> ≲ 0.1 <italic>Z</italic><sub>⊙</sub>).

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  59. Subaru High-z Exploration of Low-luminosity Quasars (SHELLQs). XII. Extended [C II] Structure (Merger or Outflow) in a z = 6.72 Red Quasar Reviewed

    Takuma Izumi, Masafusa Onoue, Yoshiki Matsuoka, Michael A. Strauss, Seiji Fujimoto, Hideki Umehata, Masatoshi Imanishi, Taiki Kawamuro, Tohru Nagao, Yoshiki Toba, Kotaro Kohno, Nobunari Kashikawa, Kohei Inayoshi, Toshihiro Kawaguchi, Kazushi Iwasawa, Akio K. Inoue, Tomotsugu Goto, Shunsuke Baba, Malte Schramm, Hyewon Suh, Yuichi Harikane, Yoshihiro Ueda, John D. Silverman, Takuya Hashimoto, Yasuhiro Hashimoto, Soh Ikarashi, Daisuke Iono, Chien-Hsiu Lee, Kianhong Lee, Takeo Minezaki, Kouichiro Nakanishi, Suzuka Nakano, Yoichi Tamura, Ji-Jia Tang

    The Astrophysical Journal   Vol. 908 ( 2 ) page: 235 - 235   2021.2

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    We present Atacama Large Millimeter/submillimeter Array [C ii] 158 μm line and far-infrared (FIR) continuum emission observations toward HSC J120505.09-000027.9 (J1205-0000) at z = 6.72 with a beam size of ∼0.″8 × 0.″5 (or 4.1 kpc × 2.6 kpc), the most distant red quasar known to date. Red quasars are modestly reddened by dust and are thought to be in rapid transition from an obscured starburst to an unobscured normal quasar, driven by powerful active galactic nucleus (AGN) feedback that blows out a cocoon of interstellar medium. The FIR continuum of J1205-0000 is bright, with an estimated luminosity of L FIR ∼ 3 × 1012 L o˙. The [C ii] line emission is extended on scales of r ∼ 5 kpc, greater than that of the FIR continuum. The line profiles at the extended regions are complex and broad (FWHM ∼ 630-780 km s-1). Although it is not practical to identify the nature of this extended structure, possible explanations include (i) companion/merging galaxies and (ii) massive AGN-driven outflows. For the case of (i), the companions are modestly star-forming (∼10 M o˙ yr-1) but are not detected by our Subaru optical observations (y AB,5σ = 24.4 mag). For the case of (ii), our lower limit to the cold neutral outflow rate is ∼100 M o˙ yr-1. The outflow kinetic energy and momentum are both much lower than predicted in energy-conserving wind models, suggesting that the AGN feedback in this quasar is not capable of completely suppressing its star formation.

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  60. The University of Tokyo Atacama Observatory 6.5m telescope: On-sky performance evaluations of the mid-infrared instrument MIMIZUKU on the Subaru telescope

    Takafumi Kamizuka, Takashi Miyata, Shigeyuki Sako, Ryou Ohsawa, Kentaro Asano, Masahito S. Uchiyama, Tomohiro Mori, Yutaka Yoshida, Kengo Tachibana, Tsubasa Michifuji, Mizuho Uchiyama, Itsuki Sakon, Takashi Onaka, Hirokazu Kataza, Tsutomu Aoki, Mamoru Doi, Bunyo Hatsukade, Natsuko M. Kato, Kotaro Kohno, Masahiro Konishi, Takeo Minezaki, Tomoki Morokuma, Mizuki Numata, Kentaro Motohara, Hiroaki Sameshima, Takao Soyano, Hidenori Takahashi, Toshihiko Tanabe, Masuo Tanaka, Ken'ichi Tarusawa, Shintaro Koshida, Yoichi Tamura, Yasunori Terao, Kosuke Kushibiki, Hiroki Nakamura, Yuzuru Yoshii

    Proceedings of the SPIE   Vol. 11447   page: 114475X   2020.12

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  61. The University of Tokyo Atacama Observatory 6.5m Telescope: Overview and construction status

    Yuzuru Yoshii, Mamoru Doi, Takashi Miyata, Kotaro Kohno, Masuo Tanaka, Takeo Minezaki, Shigeyuki Sako, Tomoki Morokuma, Toshihiko Tanabe, Bunyo Hatsukade, Masahiro Konishi, Takafumi Kamizuka, Kentaro Asano, Hiroaki Sameshima, Natsuko M. Kato, Mizuki Mumata, Hidenori Takahashi, Tsutomu Aoki, Takao Soyano, Ken'ichi Tarusawa, Kenji Yoshikawa, Kentaro Motohara, Yoichi Tamura, Shintaro Koshida, Toshihiro Handa, Leonardo Bronfman, Maria T. Ruiz, Mario Hamuy, Rene Mendez, Andres Escala

    Proceedings of the SPIE   Vol. 11445   page: 1144514   2020.12

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  62. Wind- and Operation-Induced Vibration Measurements of the Main Reflector of the Nobeyama 45 m Radio Telescope Reviewed

    Ikumi Hashimoto, Masakatsu Chiba, Nozomi Okada, Hideo Ogawa, Ryohei Kawabe, Tetsuhiro Minamidani, Yoichi Tamura, Kimihiro Kimura

    Journal of Vibration Engineering & Technologies   Vol. 8 ( 6 ) page: 909 - 923   2020.12

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    Purpose: As deformations of the main reflector of a radio telescope directly affect the observations, the evaluation of the deformation is extremely important. Dynamic characteristics of the main reflector of the Nobeyama 45 m Radio Telescope, Japan, are measured under two conditions: the first is when the pointing observation is in operation, and the second is when the reflector is stationary and is subjected to wind loads when the observation is out of operation. Methods: Dynamic characteristics of the main reflector are measured using piezoelectric accelerometers. Results and Conclusion: When the telescope is in operation, a vibration mode with one nodal line horizontally or vertically on the reflector is induced, depending on whether the reflector is moving in the azimuthal or elevational planes, whereas under windy conditions, vibration modes that have two to four nodal lines are simultaneously induced. The predominant mode is dependent on the direction of wind loads.

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  63. ALMA Deep Field in SSA22. A near-infrared-dark submillimeter galaxy at z = 4.0 Reviewed

    Hideki Umehata, Ian Smail, A. M. Swinbank, Kotaro Kohno, Yoichi Tamura, Tao Wang, Yiping Ao, Bunyo Hatsukade, Mariko Kubo, Kouchiro Nakanishi, Natsuki N. Hayatsu

    Astronomy & Astrophysics   Vol. 640   page: L8 - L8   2020.8

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    Deep surveys with the Atacama Large Millimeter Array (ALMA) have uncovered a population of dusty star-forming galaxies which are faint or even undetected at optical to near-infrared wavelengths. Their faintness at short wavelengths makes the detailed characterization of the population challenging. Here we present a spectroscopic redshift identification and a characterization of one of these near-infrared-dark galaxies discovered by an ALMA deep survey. The detection of [C <sc>I</sc>](1–0) and CO(4–3) emission lines determines the precise redshift of the galaxy, ADF22.A2, to be <italic>z</italic> = 3.9913 ± 0.0008. On the basis of a multi-wavelength analysis, ADF22.A2 is found to be a massive, star-forming galaxy with a stellar mass of <italic>M</italic><sub>∗</sub> = 1.1<sub>−0.6</sub><sup>+1.3</sup> × 10<sup>11</sup> <italic>M</italic><sub>⊙</sub> and SFR = 430<sub>−150</sub><sup>+230</sup> <italic>M</italic><sub>⊙</sub> yr<sup>−1</sup>. The molecular gas mass was derived to be <italic>M</italic>(H<sub>2</sub>)<sup>[CI]</sup> = (5.9 ± 1.5)×10<sup>10</sup> <italic>M</italic><sub>⊙</sub>, indicating a gas fraction of ≈35%, and the ratios of <italic>L</italic><sub>[CI](1−0)</sub>/<italic>L</italic><sub>IR</sub> and <italic>L</italic><sub>[CI](1−0)</sub>/<italic>L</italic><sub>CO(4−3)</sub> suggest that the nature of the interstellar medium in ADF22.A2 is in accordance with those of other bright submillimeter galaxies. The properties of ADF22.A2, including the redshift, star-formation rate, stellar mass, and depletion time scale (<italic>τ</italic><sub>dep</sub> ≈ 0.1−0.2 Gyr), also suggest that ADF22.A2 has the characteristics expected for the progenitors of quiescent galaxies at <italic>z</italic> ≳ 3. Our results demonstrate the power of ALMA contiguous mapping and line scan, which help us to obtain an unbiased view of galaxy formation in the early Universe.

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  64. ALMA twenty-six arcmin^2 survey of GOODS-S at one millimeter (ASAGAO): Millimeter properties of stellar mass selected galaxies Reviewed

    Yuki Yamaguchi, Kotaro Kohno, Bunyo Hatsukade, Tao Wang, Yuki Yoshimura, Yiping Ao, James S Dunlop, Eiichi Egami, Daniel Espada, Seiji Fujimoto, Natsuki H Hayatsu, Rob J Ivison, Tadayuki Kodama, Haruka Kusakabe, Tohru Nagao, Masami Ouchi, Wiphu Rujopakarn, Ken-ichi Tadaki, Yoichi Tamura, Yoshihiro Ueda, Hideki Umehata, Wei-Hao Wang

    Publications of the Astronomical Society of Japan   Vol. 72 ( 4 ) page: 69   2020.8

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    We make use of the ALMA twenty-Six Arcmin2 survey of GOODS-S At One-millimeter (ASAGAO), deep 1.2 mm continuum observations of a 26-arcmin2 region in the Great Observatories Origins Deep Survey-South (GOODS-S) obtained with Atacama Large Millimeter/sub-millimeter Array (ALMA), to probe dust-enshrouded star formation in K-band selected (i.e., stellar mass selected) galaxies, which are drawn from the FourStar Galaxy Evolution Survey (ZFOURGE) catalog. Based on the ASAGAO combined map, which was created by combining ASAGAO and ALMA archival data in the GOODS-South field, we find that 24 ZFOURGE sources have 1.2 mm counterparts with a signal-to-noise ratio &amp;gt;4.5 (1σ ≃ 30–70 μJy beam−1 at 1.2 mm). Their median redshift is estimated to be $z$median = 2.38 ± 0.14. They generally follow the tight relationship of the stellar mass versus star formation rate (i.e., the main sequence of star-forming galaxies). ALMA-detected ZFOURGE sources exhibit systematically larger infrared (IR) excess (IRX ≡ LIR/LUV) compared to ZFOURGE galaxies without ALMA detections even though they have similar redshifts, stellar masses, and star formation rates. This implies the consensus stellar-mass versus IRX relation, which is known to be tight among rest-frame-ultraviolet-selected galaxies, cannot fully predict the ALMA detectability of stellar-mass-selected galaxies. We find that ALMA-detected ZFOURGE sources are the main contributors to the cosmic IR star formation rate density at $z$ = 2–3.

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  65. Spatially resolved molecular gas properties of host galaxy of Type I superluminous supernova SN 2017egm Reviewed

    Bunyo Hatsukade, Kana Morokuma-Matsui, Masao Hayashi, Nozomu Tominaga, Yoichi Tamura, Kotaro Niinuma, Kazuhiro Motogi, Tomoki Morokuma, Yuichi Matsuda

    Publications of the Astronomical Society of Japan   Vol. 72 ( 4 ) page: L6   2020.8

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    We present the results of CO(1–0) observations of the host galaxy of a Type I superluminous supernova (SLSN-I), SN 2017egm, one of the closest SLSNe-I at z = 0.03063, by using the Atacama Large Millimeter/submillimeter Array. The molecular gas mass of the host galaxy is Mgas = (4.8 ± 0.3) × 109 M⊙, placing it on the sequence of normal star-forming galaxies in an Mgas–star-formation rate (SFR) plane. The molecular hydrogen column density at the location of SN 2017egm is higher than that of the Type II SN PTF10bgl, which is also located in the same host galaxy, and those of other Type II and Ia SNe located in different galaxies, suggesting that SLSNe-I have a preference for a dense molecular gas environment. On the other hand, the column density at the location of SN 2017egm is comparable to those of Type Ibc SNe. The surface densities of molecular gas and the SFR at the location of SN 2017egm are consistent with those of spatially resolved local star-forming galaxies and follow the Schmidt–Kennicutt relation. These facts suggest that SLSNe-I can occur in environments with the same star-formation mechanism as in normal star-forming galaxies.

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  66. Large Population of ALMA Galaxies atz > 6 with Very High [Oiii] 88 mu m to [Cii] 158 mu m Flux Ratios: Evidence of Extremely High Ionization Parameter or PDR Deficit? Reviewed

    Harikane Yuichi, Ouchi Masami, Inoue Akio K., Matsuoka Yoshiki, Tamura Yoichi, Bakx Tom, Fujimoto Seiji, Moriwaki Kana, Ono Yoshiaki, Nagao Tohru, Tadaki Ken-ichi, Kojima Takashi, Shibuya Takatoshi, Egami Eiichi, Ferrara Andrea, Gallerani Simona, Hashimoto Takuya, Kohno Kotaro, Matsuda Yuichi, Matsuo Hiroshi, Pallottini Andrea, Sugahara Yuma, Vallini Livia

    ASTROPHYSICAL JOURNAL   Vol. 896 ( 2 )   2020.6

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  67. ALMA detection of the [OIII] 88 μm line in a highly-magnified Lyman break galaxy at z = 6.1 International journal

    Kaho Sunaga, Yoichi Tamura, Minju Lee, Ken Mawatari, Akio K. Inoue, Takuya Hashimoto, Hiroshi Matsuo, Akio Taniguchi

    Proceedings of the International Astronomical Union   Vol. 15 ( S341 ) page: 309 - 311   2020.6

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    <title>Abstract</title>We present a 4.7σ detection of the [OIII] 88 <italic>μ</italic>m line in a gravitationally-lensed Lyman break galaxy, RXC J2248-ID3, using the Atacama Large Millimeter/submillimeter Array (ALMA). We did not detect [CII] 158 <italic>μ</italic>m and rest-frame 90 <italic>μ</italic>m dust continuum emission, suggesting that the bulk of the interstellar medium (ISM) is ionized. Our two-component SED model combining the previous Hubble Space Telescope (HST) data and new photometry obtained from Very Large Telescope (VLT), Spitzer and ALMA suggests the presence of young (∼2 Myr) and mature (∼600 Myr) stellar components with the metallicity of <italic>Z</italic> = 0.2Z<sub>⊙</sub>. Our findings are in contrast with previous results claiming a very young, metal-poor stellar component.

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  68. Dust evolution in galaxies at z > 7 International journal

    Tsutomu T. Takeuchi, Ryosuke S. Asano, Sayaka Nagasaki, Takaya Nozawa, Yoichi Tamura, Ken Mawatari, Akio K. Inoue

    Proceedings of the International Astronomical Union   Vol. 15 ( S341 ) page: 312 - 313   2020.6

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    <title>Abstract</title>Recently huge amount of dust <italic>M</italic><sub>dust</sub> ≃ 10<sup>6−7</sup><italic>M</italic><sub>⊙</sub> in galaxies at <italic>z</italic> = 7–8 has been discovered by ALMA observations. The suggested timescale of the dust production was a few–several×10<sup>8</sup> yr, while the stellar mass was several × 10<sup>9</sup><italic>M</italic><sub>⊙</sub>. This amount of dust cannot be easily explained only by a supply from supernovae if we consider the dust destruction by reverse shocks. We propose that these values can be consistently explained if we take into account the grain growth in the interstellar medium (ISM). This scenario successfully reproduces the evolution of the dust mass, as well as the SFR, and stellar mass simultaneously. We conclude that even at such an early epoch of the Universe, the dust grain growth in the ISM plays a significant role in galaxies.

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  69. Rapid evolution and transformation into quiescence?: ALMA view on z > 6 low-luminosity quasars

    Takuma Izumi, Masafusa Onoue, Yoshiki Matsuoka, Tohru Nagao, Michael A. Strauss, Masatoshi Imanishi, Nobunari Kashikawa, Seiji Fujimoto, Kotaro Kohno, Yoshiki Toba, Hideki Umehata, Tomotsugu Goto, Yoshihiro Ueda, Hikari Shirakata, John D. Silverman, Jenny E. Greene, Yuichi Harikane, Yasuhiro Hashimoto, Soh Ikarashi, Daisuke Iono, Kazushi Iwasawa, Chien-Hsiu Lee, Takeo Minezaki, Kouichiro Nakanishi, Yoichi Tamura, Ji-Jia Tang, Akio Taniguchi

    Proceedings of the International Astronomical Union   Vol. 15 ( S352 ) page: 139 - 143   2020.6

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    <title>Abstract</title>We present ALMA [CII] line and far-infrared (FIR) continuum observations of seven <italic>z</italic> &gt; 6 low-luminosity quasars (<italic>M</italic><sub>1450</sub> &gt; −25 mag) discovered by our on-going Subaru Hyper Suprime-Cam survey. The [CII] line was detected in all targets with luminosities of ∼(2−10) × 10<sup>8</sup> L<sub>⊙</sub>, about one order of magnitude smaller than optically luminous quasars. Also found was a wide scatter of FIR continuum luminosity, ranging from <italic>L</italic><sub>FIR</sub> &lt; 10<sup>11</sup><italic>L</italic><sub>⊙</sub> to ∼2 × 10<sup>12</sup><italic>L</italic><sub>⊙</sub>. With the [CII]-based dynamical mass, we suggest that a significant fraction of low-luminosity quasars are located on or even below the local Magorrian relation, particularly at the massive end of the galaxy mass distribution. This is a clear contrast to the previous finding that luminous quasars tend to have overmassive black holes relative to the relation. Our result is expected to show a less-biased nature of the early co-evolution of black holes and their host galaxies.

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  70. Panchromatic Analysis for Nature of HIgh-z galaxies Tool (PANHIT) International journal

    Ken Mawatari, Akio K. Inoue, Satoshi Yamanaka, Takuya Hashimoto, Yoichi Tamura

    Proceedings of the International Astronomical Union   Vol. 15 ( S341 ) page: 285 - 286   2020.6

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    <title>Abstract</title>We have developed a new SED fitting tool specialized for frontier redshift galaxies. It is a common case for high-<italic>z</italic> galaxies that the available data are restricted to rich optical to near-infrared photometry and few far-infrared (FIR) data deep enough to detect the faint object (e.g., <italic>HST</italic>/WFC3 + <italic>Spitzer</italic>/IRAC + ALMA). In such situation, one cannot perform a complicated modeling of dust emission in FIR regime. We then adopt simple treatment for the dust emission using empirical LIRG templates. Instead, we adopt a sophisticated and physically motivated modeling for stellar and nebular emission parts in rest-frame UV-to-optical regime. Our new code fits not only broad band photometry but also spectral emission line flux. There is an option to fit observed SED with two templates with different physical properties. Our new code, PANHIT, is now in public, and was already applied to some high-<italic>z</italic> frontier galaxies.

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  71. ALMA Observations of Molecular Gas in the Host Galaxies of Long-duration GRBs

    Hatsukade, Bunyo, Ohta, Kouji, Hashimoto, Tetsuya, Kohno, Kotaro, Nakanishi, Kouichiro, Niino, Yuu, Tamura, Yoichi

    Yamada Conference LXXI: Gamma-ray Bursts in the Gravitational Wave Era 2019     page: 157 - 159   2020.5

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  72. DESHIMA on ASTE: On-Sky Responsivity Calibration of the Integrated Superconducting Spectrometer Reviewed

    Tatsuya Takekoshi, Kenichi Karatsu, Junya Suzuki, Yoichi Tamura, Tai Oshima, Akio Taniguchi, Shin’ichiro Asayama, Tom J. L. C. Bakx, Jochem J. A. Baselmans, Sjoerd Bosma, Juan Bueno, Kah Wuy Chin, Yasunori Fujii, Kazuyuki Fujita, Robert Huiting, Soh Ikarashi, Tsuyoshi Ishida, Shun Ishii, Ryohei Kawabe, Teun M. Klapwijk, Kotaro Kohno, Akira Kouchi, Nuria Llombart, Jun Maekawa, Vignesh Murugesan, Shunichi Nakatsubo, Masato Naruse, Kazushige Ohtawara, Alejandro Pascual Laguna, Koyo Suzuki, David J. Thoen, Takashi Tsukagoshi, Tetsutaro Ueda, Pieter J. de Visser, Paul P. van der Werf, Stephen J. C. Yates, Yuki Yoshimura, Ozan Yurduseven, Akira Endo

    Journal of Low Temperature Physics   Vol. 199 ( 1-2 ) page: 231 - 239   2020.4

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    We are developing an ultra-wideband spectroscopic instrument, DESHIMA (DEep Spectroscopic HIgh-redshift MApper), based on the technologies of an on-chip filter bank and microwave kinetic inductance detector (MKID) to investigate dusty starburst galaxies in the distant universe at millimeter and submillimeter wavelengths. An on-site experiment of DESHIMA was performed using the ASTE 10-m telescope. We established a responsivity model that converts frequency responses of the MKIDs to line-of-sight brightness temperature. We estimated two parameters of the responsivity model using a set of skydip data taken under various precipitable water vapor (PWV 0.4-3.0 mm) conditions for each MKID. The line-of-sight brightness temperature of sky is estimated using an atmospheric transmission model and the PWVs. As a result, we obtain an average temperature calibration uncertainty of 1 sigma=4, which is smaller than other photometric biases. In addition, the average forward efficiency of 0.88 in our responsivity model is consistent with the value expected from the geometrical support structure of the telescope. We also estimate line-of-sight PWVs of each skydip observation using the frequency response of MKIDs and confirm the consistency with PWVs reported by the Atacama Large Millimeter/submillimeter Array.

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  73. ALMA uncovers the [C II] emission and warm dust continuum in a z=8.31 Lyman break galaxy Reviewed

    Bakx Tom J. L. C., Tamura Yoichi, Hashimoto Takuya, Inoue Akio K., Lee Minju M., Mawatari Ken, Ota Kazuaki, Umehata Hideki, Zackrisson Erik, Hatsukade Bunyo, Kohno Kotaro, Matsuda Yuichi, Matsuo Hiroshi, Okamoto Takashi, Shibuya Takatoshi, Shimizu Ikkoh, Taniguchi Yoshiaki, Yoshida Naoki

    MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY   Vol. 493 ( 3 ) page: 4294 - 4307   2020.4

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  74. ALMA CO Observations of the Host Galaxies of Long-duration Gamma-Ray Bursts. I. Molecular Gas Scaling Relations Reviewed

    Bunyo Hatsukade, Kouji Ohta, Tetsuya Hashimoto, Kotaro Kohno, Kouichiro Nakanishi, Yuu Niino, Yoichi Tamura

    The Astrophysical Journal   Vol. 892 ( 1 ) page: 42 - 42   2020.3

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  75. A new off-point-less observing method for millimeter and submillimeter spectroscopy with a frequency-modulating local oscillator Reviewed

    Akio Taniguchi, Yoichi Tamura, Kotaro Kohno, Shigeru Takahashi, Osamu Horigome, Jun Maekawa, Takeshi Sakai, Nario Kuno, Tetsuhiro Minamidani

    Publications of the Astronomical Society of Japan   Vol. 72 ( 1 ) page: 2   2020.2

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    <title>Abstract</title>
    We propose a new observing method for single-dish millimeter and submillimeter spectroscopy using a heterodyne receiver equipped with a frequency-modulating local oscillator (FMLO). Unlike conventional switching methods, which extract astronomical signals by subtracting the reference spectra of off-sources from those of on-sources, the FMLO method does not need to obtain any off-source spectra; rather, it estimates them from the on-source spectra themselves. The principle uses high-dump-rate (10 Hz) spectroscopy with radio frequency modulation achieved by fast sweeping of a local oscillator of a heterodyne receiver. Because sky emission (i.e., off-source) fluctuates as $1/f$ and is spectrally correlated, it can be estimated and subtracted from time series spectra (a timestream) by principal component analysis. Meanwhile, astronomical signals remain in the timestream since they are modulated to a higher time-frequency domain. The FMLO method therefore achieves (1) a remarkably high observation efficiency, (2) reduced spectral baseline wiggles, and (3) software-based sideband separation. We developed an FMLO system for the Nobeyama $45\:$m telescope and a data reduction procedure for it. Frequency modulation was realized by a tunable and programmable first local oscillator. With observations of Galactic sources, we demonstrate that the observation efficiency of the FMLO method is dramatically improved compared to conventional switching methods. Specifically, we find that the time to achieve the same noise level is reduced by a factor of 3.0 in single-pointed observations and by a factor of 1.2 in mapping observations. The FMLO method can be applied to observations of fainter ($\sim$mK) spectral lines and larger ($\sim$deg$^{2}$) mapping. It offers much more efficient and baseline-stable observations compared to conventional switching methods.

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  76. Large format imaging spectrograph for the Large Submillimeter Telescope (LST)

    Kotaro Kohno, Ryohei Kawabe, Yoichi Tamura, Akira Endo, Jochem J. A. Baselmans, Kenichi Karatsu, Akio Inoue, Kana Moriwaki, Natsuki H. Hayatsu, Naoki Yoshida, Yuki Yoshimura, Bunyo Hatsukade, Hideki Umehata, Tai Oshima, Tatsuya Takekoshi, Akio Taniguchi, Pamela Klaassen, Tony Mroczkowski, Claudia Cicone, Frank Bertoldi, Helmut Dannerbauer, Tomoka Tosaki

    Proceedings of the SPIE   Vol. 11453   page: 114530N   2020

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    We present a conceptual study of a large format imaging spectrograph for next-generation large (50-m class) single-dish telescopes, i.e., the Large Submillimeter Telescope (LST) and Atacama Large Aperture Submillimeter Telescope (AtLAST). Recent discoveries of high-redshift star-forming galaxies at z=8-9 and candidate quiescent galaxies at z∼6 indicate the onset of earliest star formation just a few 100 million years after the Big Bang (i.e., z = 12-15), and LST/AtLAST will provide a unique pathway to uncover spectroscopically-identified ''first forming galaxies'' in the pre-reionization era, once it will be equipped with a large format imaging spectrograph. We describe the preliminary of 3-band, medium resolution (R=2000) imaging spectrograph with ∼1.5 M detectors in total based on the KATANA concept (Karatsu et al.∼2019), which exploits technologies of the integrated superconducting spectrometer (ISS) and a large-format imaging array like A-MKID.

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  77. TiEMPO: Open-source time-dependent end-to-end model for simulating ground-based submillimeter astronomical observations

    Esmee Huijten, Yannick Roelvink, Stefanie A. Brackenhoff, Akio Taniguchi, Tom Bakx, Kaushal B. Marthi, Stan Zaalberg, Jochem J. A. Baselmans, Kah Wuy Chin, Robert Huiting, Kenichi Karatsu, Alejandro Pascual Laguna, Yoichi Tamura, Tatsuya Takekoshi, Stephen J. C. Yates, Maarten van Hoven, Akira Endo

    Proceedings of the SPIE   Vol. 11453   page: 114533C   2020

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  78. ALMA twenty-six arcmin<sup>2</sup>survey of GOODS-S at one millimeter (ASAGAO)

    Hatsukade B., Kohno K., Yamaguchi Y., Umehata H., Ao Y., Aretxaga I., Caputi K.I., Dunlop J.S., Egami E., Espada D., Fujimoto S., Hayatsu N., Hughes D.H., Ikarashi S., Iono D., Ivison R.J., Kawabe R., Kodama T., Lee M., Matsuda Y., Nakanishi K., Ohta K., Ouchi M., Rujopakarn W., Suzuki T., Tamura Y., Ueda Y., Wang T., Wang W.H., Wilson G.W., Yoshimura Y., Yun M.S.

    Proceedings of the International Astronomical Union     page: 239 - 240   2020

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    The ALMA twenty-six arcmin2 survey of GOODS-S at one millimeter (ASAGAO) is a deep (1σ ∼61μJy/beam) and wide area (26 arcmin2) survey on a contiguous field at 1.2 mm. By combining with archival data, we obtained a deeper map in the same region (1σ ∼30μJy/beam-1, synthesized beam size 0.59″ × 0.53″), providing the largest sample of sources (25 sources at 5σ, 45 sources at 4.5σ) among ALMA blank-field surveys. The median redshift of the 4.5σ sources is 2.4. The number counts shows that 52% of the extragalactic background light at 1.2 mm is resolved into discrete sources. We create IR luminosity functions (LFs) at z = 1-3, and constrain the faintest luminosity of the LF at 2 < z < 3. The LFs are consistent with previous results based on other ALMA and SCUBA-2 observations, which suggests a positive luminosity evolution and negative density evolution.

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  79. Detections of [O III] 88 μm in two quasars in the reionization epoch Reviewed

    Hashimoto, Takuya, Inoue, Akio K., Tamura, Yoichi, Matsuo, Hiroshi, Mawatari, Ken, Yamaguchi, Yuki

    Publications of the Astronomical Society of Japan   Vol. 71 ( 6 )   2019.12

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    We report on detections with the Atacama Large Millimeter/sub-millimeter Array of the far-infrared [O III] 88 μm line and the underlying dust continuum in two quasars in the reionization epoch, J205406.48-000514.8 (hereafter J2054-0005) at z = 6.0391 ± 0.0002 and J231038.88+185519.7 (hereafter J2310+1855) at z = 6.0035 ± 0.0007. The [O III] luminosities of J2054-0005 and J2310+1855 are L<SUB>[O III]</SUB> = (6.8 ± 0.6) × 10<SUP>9</SUP> and (2.4 ± 0.6) × 10<SUP>9</SUP> L<SUB>☉</SUB>, corresponding to ̃0.05% and 0.01% of the total infrared luminosity, L<SUB>TIR</SUB>, respectively. Combining these [O III] luminosities with [C II] 158 μm luminosities in the literature, we find that J2054-0005 and J2310+1855 have [O III]-to-[C II] luminosity ratios of 2.1 ± 0.4 and 0.3 ± 0.1, respectively, the latter of which is the lowest among objects so far reported at z &gt; 6. Combining [O III] observations at z ≈ 6-9 from our study and the literature, we identify the [O III] line deficit: objects with a larger L<SUB>TIR</SUB> (total infrared luminosity) have lower L<SUB>[O III]</SUB>-to-L<SUB>TIR</SUB> ratios. Furthermore, we also find that the anti-correlation is shifted toward a higher L<SUB>TIR</SUB> value when compared with the local [O III] line deficit....

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  80. Subaru High-z Exploration of Low-Luminosity Quasars (SHELLQs). VIII. A less biased view of the early co-evolution of black holes and host galaxies Reviewed

    Takuma Izumi, Masafusa Onoue, Yoshiki Matsuoka, Tohru Nagao, Michael A Strauss, Masatoshi Imanishi, Nobunari Kashikawa, Seiji Fujimoto, Kotaro Kohno, Yoshiki Toba, Hideki Umehata, Tomotsugu Goto, Yoshihiro Ueda, Hikari Shirakata, John D Silverman, Jenny E Greene, Yuichi Harikane, Yasuhiro Hashimoto, Soh Ikarashi, Daisuke Iono, Kazushi Iwasawa, Chien-Hsiu Lee, Takeo Minezaki, Kouichiro Nakanishi, Yoichi Tamura, Ji-Jia Tang, Akio Taniguchi

    Publications of the Astronomical Society of Japan   Vol. 71 ( 6 )   2019.12

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    <title>Abstract</title>
    We present ALMA [C ii] line and far-infrared (FIR) continuum observations of three $z \gt 6$ low-luminosity quasars ($M_{\rm 1450} \gt -25$ mag) discovered by our Subaru Hyper Suprime-Cam (HSC) survey. The [C ii] line was detected in all three targets with luminosities of $(2.4\mbox{--}9.5) \times 10^8\, L_{\odot }$, about one order of magnitude smaller than optically luminous ($M_{\rm 1450} \lesssim -25$ mag) quasars. The FIR continuum luminosities range from $\lt 9 \times 10^{10}\, L_{\odot }$ (3 $\sigma$ limit) to ${\sim } 2 \times 10^{12}\, L_{\odot }$, indicating a wide range in star formation rates in these galaxies. Most of the HSC quasars studied thus far show [C ii]/ FIR luminosity ratios similar to local star-forming galaxies. Using the [C ii]-based dynamical mass ($M_{\rm dyn}$) as a surrogate for bulge stellar mass ($M_{\rm\, bulge}$), we find that a significant fraction of low-luminosity quasars are located on or even below the local $M_{\rm\, BH}$–$M_{\rm\, bulge}$ relation, particularly at the massive end of the galaxy mass distribution. In contrast, previous studies of optically luminous quasars have found that black holes are overmassive relative to the local relation. Given the low luminosities of our targets, we are exploring the nature of the early co-evolution of supermassive black holes and their hosts in a less biased way. Almost all of the quasars presented in this work are growing their black hole mass at a much higher pace at $z \sim 6$ than the parallel growth model, in which supermassive black holes and their hosts grow simultaneously to match the local $M_{\rm\, BH}$–$M_{\rm\, bulge}$ relation at all redshifts. As the low-luminosity quasars appear to realize the local co-evolutionary relation even at $z \sim 6$, they should have experienced vigorous starbursts prior to the currently observed quasar phase to catch up with the relation.

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  81. First [N II]122 μm Line Detection in a QSO-SMG Pair BRI 1202-0725 at z = 4.69 Reviewed

    Lee, Minju M., Nagao, Tohru, De Breuck, Carlos, Carniani, Stefano, Cresci, Giovanni, Hatsukade, Bunyo, Kawabe, Ryohei, Kohno, Kotaro, Maiolino, Roberto, Mannucci, Filippo, Marconi, Alessandro, Nakanishi, Kouichiro, Saito, Toshiki, Tamura, Yoichi, Troncoso, Paulina, Umehata, Hideki, Yun, Min

    The Astrophysical Journal   Vol. 883 ( 2 ) page: L29   2019.10

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    We report the first detection obtained with the Atacama Large Millimeter/submillimeter Array of the [N II] 122 μm line emission from a galaxy group BRI 1202-0725 at z = 4.69 consisting of a quasi-stellar object (QSO) and a submillimeter-bright galaxy (SMG). Combining this with a detection of [N II] 205 μm line in both galaxies, we constrain the electron densities of the ionized gas based on the line ratio of [N II] 122/205. The derived electron densities are {26}<SUB>-11</SUB><SUP>+12</SUP> and {134}<SUB>-39</SUB><SUP>+50</SUP> cm<SUP>-3</SUP> for the SMG and the QSO, respectively. The electron density of the SMG is similar to that of the Galactic Plane and to the average of the local spirals. However, higher electron densities (by up to a factor of three) could be possible for systematic uncertainties of the line flux estimates. The electron density of the QSO is comparable to high-z star-forming galaxies at z = 1.5-2.3, obtained using rest-frame optical lines and with the lower limits suggested from stacking analysis on lensed starbursts at z = 1-3.6 using the same tracer of [N II]. Our results suggest a large scatter of electron densities in global scale at fixed star formation rates for extreme starbursts. The success of the [N II] 122 μm and 205 μm detections at z = 4.69 demonstrates the power of future systematic surveys of extreme starbursts at z &gt; 4 for probing the interstellar medium conditions and the effects on surrounding environments....

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  82. Large Population of ALMA Galaxies at z&gt;6 with Very High [OIII]88um to [CII]158um Flux Ratios: Evidence of Extremely High Ionization Parameter or PDR Deficit? Reviewed

    Harikane, Yuichi, Ouchi, Masami, Inoue, Akio K., Matsuoka, Yoshiki, Tamura, Yoichi, Bakx, Tom, Fujimoto, Seiji, Moriwaki, Kana, Ono, Yoshiaki, Nagao, Tohru, Tadaki, Ken-ichi, Kojima, Takashi, Shibuya, Takatoshi, Egami, Eiichi, Ferrara, Andrea, Gallerani, Simona, Hashimoto, Takuya, Kohno, Kotaro, Matsuda, Yuichi, Matsuo, Hiroshi, Pallottini, Andrea, Sugahara, Yuma, Vallini, Livia

        2019.10

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    We present our new ALMA observations targeting [OIII]88um, [CII]158um, [NII]122um, and dust continuum emission for three Lyman break galaxies at z=6.0293-6.2037 identified in the Subaru/Hyper Suprime-Cam survey. We clearly detect [OIII] and [CII] lines from all of the galaxies at 4.3-11.8sigma levels, and identify multi-band dust continuum emission in two of the three galaxies, allowing us to estimate infrared luminosities and dust temperatures simultaneously. In conjunction with previous ALMA observations for six galaxies at z&gt;6, we confirm that all the nine z=6-9 galaxies have high [OIII]/[CII] ratios of L[OIII]/L[CII]~3-20, ~10 times higher than z~0 galaxies. We also find a positive correlation between the [OIII]/[CII] ratio and the Lya equivalent width (EW) at the &gt;91% confidence level. We carefully investigate physical origins of the high [OIII]/[CII] ratios at z=6-9 using Cloudy, and find that high density of the interstellar medium, low C/O abundance ratio, and the cosmic microwave background attenuation are responsible to only a part of the z=6-9 galaxies. Instead, the observed high [OIII]/[CII] ratios are explained by 10-100 times higher ionization parameters or low photodissociation region (PDR) covering fractions of 0-10%, both of which are consistent with our [NII] observations. The latter scenario can be reproduced with a density bounded nebula with PDR deficit, which would enhance the Lya, Lyman continuum, and C+ ionizing photons escape from galaxies, consistent with the [OIII]/[CII]-Lya EW correlation we find. <P />...

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  83. A Radio-to-millimeter Census of Star-forming Galaxies in Protocluster 4C 23.56 at z = 2.5: Global and Local Gas Kinematics Reviewed

    Lee, Minju M., Tanaka, Ichi, Kawabe, Ryohei, Aretxaga, Itziar, Hatsukade, Bunyo, Izumi, Takuma, Kajisawa, Masaru, Kodama, Tadayuki, Kohno, Kotaro, Nakanishi, Kouichiro, Saito, Toshiki, Tadaki, Ken-ichi, Tamura, Yoichi, Umehata, Hideki, Zeballos, Milagros

    The Astrophysical Journal   Vol. 883 ( 1 ) page: 92   2019.9

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    We present a study of the gas kinematics of star-forming galaxies associated with protocluster 4C 23.56 at z = 2.49 using 0.″4 resolution CO (4-3) data taken with ALMA. Eleven Hα emitters (HAEs) are detected in CO (4-3), including six HAEs that were previously detected in CO (3-2) at a coarser angular resolution. The detections in both CO lines are broadly consistent in the line widths and the redshifts, confirming both detections. With an increase in the number of spectroscopic redshifts, we confirm that the protocluster is composed of two merging groups with a total halo mass of log (M <SUB>cl</SUB>/M <SUB>☉</SUB>) = 13.4-13.6, suggesting that the protocluster would evolve into a Virgo-like cluster (&gt;10<SUP>14</SUP> M <SUB>☉</SUB>). We compare the CO line widths and the CO luminosities with other (proto)clusters (n <SUB>gal</SUB> = 91) and general field (n <SUB>gal</SUB> = 80) galaxies from other studies. The 4C 23.56 protocluster galaxies have CO line widths and luminosities comparable to other protocluster galaxies on average. On the other hand, the CO line widths are on average broader by ≈50% compared to field galaxies, while the median CO luminosities are similar. The broader line widths can be attributed to both effects of unresolved gas-rich mergers and/or compact gas distribution, which is supported by our limited but decent angular resolution observations and the size estimate of three galaxies. Based on these results, we argue that gas-rich mergers may play a role in the retention of the specific angular momentum to a value similar to that of field populations during cluster assembly, though we need to verify this with a larger number of samples....

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  84. ADF22: Blind Detections of [C II] Line Emitters Shown to be Spurious Reviewed

    Natsuki H. Hayatsu, R. J. Ivison, Paola Andreani, Hideki Umehata, Yuichi Matsuda, Naoki Yoshida, Kotaro Kohno, Bunyo Hatsukade, Akio K. Inoue, Yoichi Tamura, Tutomu T. Takeuchi, Seiji Fujimoto, Minju M. Lee, Tohru Nagao, Yiping Ao

    Research Notes of the AAS     2019.7

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    We report Atacama Large Millimetre/submillimeter Array (ALMA) Cycle-5
    follow-up observations of two candidate [CII] emitters at z ~ 6 in the ALMA
    deep field in SSA22 (ADF22). The candidates were detected blindly in a Cycle-2
    ALMA survey covering ~ 5 square arcmins, with a single tuning, along with two
    CO lines associated with galaxies at lower redshifts. Various tests suggested
    at least one of the two > 6-sigma [CII] candidates should be robust (Hayatsu et
    al. 2017). Nevertheless, our new, deeper observations recover neither
    candidate, demonstrating a higher contamination rate than expected. The cause
    of the spurious detections is under investigation but at present it remains
    unclarified.

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  85. ALMA Observations of Molecular Gas in the Host Galaxy of AT2018cow Reviewed

    Kana Morokuma-Matsui, Tomoki Morokuma, Nozomu Tominaga, Bunyo Hatsukade, Masao Hayashi, Yoichi Tamura, Yuichi Matsuda, Kazuhito Motogi, Kotaro Niinuma, Masahiro Konishi

    The Astrophysical Journal   Vol. 879 ( 1 ) page: L13   2019.7

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    We investigate the molecular gas in, and star-formation properties of, the
    host galaxy (CGCG 137-068) of a mysterious transient, AT2018cow, at kpc and
    larger scales, using archival band-3 data from the Atacama Large
    Millimeter/submillimeter Array (ALMA). AT2018cow is the nearest Fast-Evolving
    Luminous Transient (FELT), and this is the very first study unveiling
    molecular-gas properties of FELTs. The achieved rms and beam size are 0.21 mJy
    beam$^{-1}$ at a velocity resolution of $40$ km s$^{-1}$ and $3".66\times2".71$
    ($1.1~{\rm kpc} \times 0.8~{\rm kpc}$), respectively. CO($J$=1-0) emission is
    successfully detected. The total molecular gas mass inferred from the CO data
    is $(1.85\pm0.04)\times10^8$ M$_\odot$ with the Milky Way CO-to-H$_2$
    conversion factor. The H$_2$ column density at the AT2018cow site is estimated
    to be $8.6\times10^{20}$ cm$^{-2}$. The ALMA data reveal that (1) CGCG 137-068
    is a normal star-forming (SF) dwarf galaxy in terms of its molecular gas and
    star-formation properties and (2) AT2018cow is located between a CO peak and a
    blue star cluster. These properties suggest on-going star formation and favor
    the explosion of a massive star as the progenitor of AT2018cow. We also find
    that CGCG 137-068 has a solar or super-solar metallicity. If the metallicity of
    the other FELT hosts is not higher than average, then some property of SF dwarf
    galaxies other than metallicity may be related to FELTs.

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  86. The absence of [CIIi] 158 μm emission in spectroscopically confirmed galaxies at z > 8 Reviewed

    N Laporte, H Katz, R S Ellis, G Lagache, F E Bauer, F Boone, A K Inoue, T Hashimoto, H Matsuo, K Mawatari, Y Tamura

    Monthly Notices of the Royal Astronomical Society: Letters   Vol. 487 ( 1 ) page: L81 - L85   2019.7

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    The scatter in the relationship between the strength of [C II] 158 μm emission and the star formation rate at high redshift has been the source of much recent interest. Although the relationship is well established locally, several intensely star-forming galaxies have been found whose [C II] 158 μm emission is either weak, absent, or spatially offset from the young stars. Here we present new ALMA data for the two most distant gravitationally lensed and spectroscopically confirmed galaxies, A2744_YD4 at z = 8.38 and MACS1149_JD1 at z = 9.11, both of which reveal intense [O III] 88 μm emission. In both cases we provide stringent upper limits on the presence of [C II] 158 μm with respect to [O III] 88 μm. We review possible explanations for this apparent redshift-dependent [C II] deficit in the context of our recent hydrodynamical simulations. Our results highlight the importance of using several emission line diagnostics with ALMA to investigate the nature of the interstellar medium in early galaxies....

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    Other Link: http://academic.oup.com/mnrasl/article-pdf/487/1/L81/28864236/slz094.pdf

  87. ALMA 26 arcmin<SUP>2</SUP> Survey of GOODS-S at 1 mm (ASAGAO): Near-infrared-dark Faint ALMA Sources Reviewed

    Yamaguchi, Yuki, Kohno, Kotaro, Hatsukade, Bunyo, Wang, Tao, Yoshimura, Yuki, Ao, Yiping, Caputi, Karina I., Dunlop, James S., Egami, Eiichi, Espada, Daniel, Fujimoto, Seiji, Hayatsu, Natsuki H., Ivison, Rob J., Kodama, Tadayuki, Kusakabe, Haruka, Nagao, Tohru, Ouchi, Masami, Rujopakarn, Wiphu, Tadaki, Ken-ichi, Tamura, Yoichi, Ueda, Yoshihiro, Umehata, Hideki, Wang, Wei-Hao, Yun, Min S.

    The Astrophysical Journal   Vol. 878 ( 1 ) page: 73   2019.6

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    We report detections of two 1.2 mm continuum sources (S <SUB>1.2 mm</SUB> ̃ 0.6 mJy) without any counterparts in the deep H- and/or K-band image (i.e., K-band magnitude ≳26 mag). These near-infrared-dark faint millimeter sources are uncovered by ASAGAO, a deep and wide-field (≃26 arcmin<SUP>2</SUP>) Atacama Large Millimeter/submillimeter Array (ALMA) 1.2 mm survey. One has a red IRAC (3.6 and 4.5 μm) counterpart, and the other has been independently detected at 850 and 870 μm using SCUBA2 and ALMA Band 7, respectively. Their optical-to-radio spectral energy distributions indicate that they can lie at z ≳ 3-5 and can be in the early phase of massive galaxy formation. Their contribution to the cosmic star formation rate density is estimated to be ̃1 × 10<SUP>-3</SUP> M <SUB>☉</SUB> yr<SUP>-1</SUP> Mpc<SUP>-3</SUP> if they lie somewhere in the redshift range of z ̃ 3-5. This value can be consistent with, or greater than, that of bright submillimeter galaxies (S <SUB>870 μm</SUB> &gt; 4.2 mJy) at z ̃ 3-5. We also uncover three more candidate near-infrared-dark faint ALMA sources without any counterparts (S <SUB>1.2 mm</SUB> ̃ 0.45-0.86 mJy). These results show that an unbiased ALMA survey can reveal the dust-obscured star formation activities, which were missed in previous deep optical/near-infrared surveys....

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  88. Molecular Gas Properties in the Host Galaxy of GRB 080207 Reviewed

    Bunyo Hatsukade, Tetsuya Hashimoto, Kotaro Kohno, Kouichiro Nakanishi, Kouji Ohta, Yuu Niino, Yoichi Tamura, L. Viktor Tóth

    The Astrophysical Journal   Vol. 876 ( 2 ) page: 91 - 91   2019.5

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    We present the results of CO(1-0) and CO(4-3) observations of the host galaxy
    of a long-duration gamma-ray burst GRB080207 at z = 2.0858 by using the Karl G.
    Jansky Very Large Array and the Atacama Large Millimeter/submillimeter Array.
    The host is detected in CO(1-0) and CO(4-3), becoming the first case for a GRB
    host with more than two CO transitions detected combined with CO(2-1) and
    CO(3-2) in the literature. Adopting a metallicity-dependent CO-to-H2 conversion
    factor, we derive a molecular gas mass of Mgas = 8.7 x 10^10 Modot, which
    places the host in a sequence of normal star-forming galaxies in a
    Mgas-star-formation rate (SFR) plane. A modified blackbody fit to the
    far-infrared--millimeter photometry results in a dust temperature of 37 K and a
    dust mass of Mdust = 1.5 x 10^8 Modot. The spatially-resolving CO(4-3)
    observations allow us to examine the kinematics of the host. The CO velocity
    field shows a clear rotation and is reproduced by a rotation-dominated disk
    model with a rotation velocity of 350 km/s and a half-light radius of 2.4 kpc.
    The CO spectral line energy distribution derived from the four CO transitions
    is similar to that of starburst galaxies, suggesting a high excitation
    condition. Comparison of molecular gas properties between the host and normal
    (main-sequence) galaxies at similar redshifts shows that they share common
    properties such as gas mass fraction, gas depletion timescale, gas-to-dust
    ratio, location in the Mgas-SFR (or surface density) relation, and kinematics,
    suggesting that long-duration GRBs can occur in normal star-forming
    environments at z ~ 2.

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  89. CNO Emission of an Unlensed Submillimeter Galaxy at z = 4.3 Reviewed

    Tadaki, Ken-ichi, Iono, Daisuke, Hatsukade, Bunyo, Kohno, Kotaro, Lee, Minju M., Matsuda, Yuichi, Michiyama, Tomonari, Nakanishi, Kouichiro, Nagao, Tohru, Saito, Toshiki, Tamura, Yoichi, Ueda, Junko, Umehata, Hideki

    The Astrophysical Journal   Vol. 876 ( 1 ) page: 1   2019.5

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    We present the results from Atacama Large Millimeter/submillimeter Array observations of [N II] 205 μm, [C II] 158 μm, and [O III] 88 μm lines in an unlensed submillimeter galaxy at z = 4.3, COSMOS-AzTEC-1, hosting a compact starburst core with an effective radius of ̃1 kpc. The [C II] and [N II] emission are spatially resolved in 0.″3-resolution (1 kpc in radius). The kinematic properties of the [N II] emission are consistent with those of the CO(4-3) and [C II] emission, suggesting that the ionized gas feels the same gravitational potential as the associated molecular gas and photodissociation regions (PDRs). On the other hand, the spatial extent is different among the lines and dust continuum: the [C II] emitting gas is the most extended and the dust is the most compact, leading to a difference of the physical conditions in the interstellar medium. We derive the incident far-ultraviolet flux and the hydrogen gas density through PDR modeling by properly subtracting the contribution of ionized gas to the total [C II] emission. The observed [C II] emission is likely produced by dense PDRs with {n}<SUB>{ { H</SUB> } }<SUP>PDR</SUP>}={10}<SUP>5.5{--</SUP>5.75} cm<SUP>-3</SUP> and G <SUB>0</SUB> = 10<SUP>3.5-3.75</SUP> in the central 1 kpc region and {n}<SUB>{ { H</SUB> } }<SUP>PDR</SUP>}={10}<SUP>5.0{--</SUP>5.25} cm<SUP>-3</SUP> and G <SUB>0</SUB> = 10<SUP>3.25-3.5</SUP> in the central 3 kpc region. We have also successfully measured the line ratio of [O III]/[N II] in the central 3 kpc region of COSMOS-AzTEC-1 at z = 4.3, which is the highest redshift where both nitrogen and oxygen lines are detected. Under the most likely physical conditions, the measured luminosity ratio of L <SUB>[O III]</SUB>/L <SUB>[N II]</SUB> = 6.4 ± 2.2 indicates a near solar metallicity with Z <SUB>gas</SUB> = 0.7-1.0 Z <SUB>☉</SUB>, suggesting a chemically evolved system at z = 4.3....

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  90. The case for a 'sub-millimeter SDSS': a 3D map of galaxy evolution to z 10 Reviewed

    Geach, James, Banerji, Manda, Bertoldi, Frank, Bethermin, Matthieu, Casey, Caitlin M., Chen, Chian-Chou, Clements, David L., Cicone, Claudia, Combes, Francoise, Conselice, Christopher, Cooray, Asantha, Coppin, Kristen, Daddi, Emanuele, Dannerbauer, Helmut, Dave, Romeel, Doherty, Matthew, Dunlop, James S., Edge, Alastair, Farrah, Duncan, Franco, Maximilien, Fuller, Gary, Garratt, Tracy, Gear, Walter, Greve, Thomas R., Hatziminaoglou, Evanthia, Hayward, Christopher C., Ivison, Rob J., Kawabe, Ryohei, Klaassen, Pamela, Knudsen, Kirsten K., Kohno, Kotaro, Koprowski, Maciej, Lagos, Claudia D. P., Magdis, Georgios E., Magnelli, Benjamin, McGee, Sean L., Michalowski, Michal, Mroczkowski, Tony, Noroozian, Omid, Narayanan, Desika, Oliver, Seb, Riechers, Dominik, Rujopakarn, Wiphu, Scott, Douglas, Serjeant, Stephen, Smith, Matthew W. L., Swinbank, Mark, Tamura, Yoichi, van der Werf, Paul, van Kampen, Eelco, Verma, Aprajita, Vieira, Joaquin, Wagg, Jeff, Walter, Fabian, Wang, Lingyu, Wootten, Al, Yun, Min S.

    Bulletin of the American Astronomical Society     2019.5

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    We argue that a 'sub-millimeter SDSS' - a sensitive large-area imaging+spectroscopic survey in the sub-mm window - will revolutionize our understanding of galaxy evolution in the early Universe. <P />...

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  91. Mapping Galaxy Clusters in the Distant Universe Reviewed

    Dannerbauer, Helmut, van Kampen, Eelco, Afonso, Jose, Andreani, Paola, Battaia, Fabrizio Arrigoni, Bertoldi, Frank, Casey, Caitlin, Chen, Chian-Chou, Clements, David L., De Breuck, Carlos, Frye, Brenda, Geach, James, Harrington, Kevin, Hayashi, Masao, Jin, Shuowen, Klaassen, Pamela, Kohno, Kotaro, Lehnert, Matthew D., Matute, Israel, Mroczkowski, Tony, Noble, Allison, Pappalardo, Ciro, Tamura, Yoichi, Zavala, Jorge

    Bulletin of the American Astronomical Society     2019.5

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    We present the science case for mapping several thousand galaxy (proto)clusters at z=1-10 with a large aperture single dish sub-mm facility, producing a high-redshift counterpart to local large surveys of rich clusters like the well-studied Abell catalogue. <P />...

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  92. Exploration and characterization of the earliest epoch of galaxy formation: beyond the re-ionization era Reviewed

    Kohno, Kotaro, Tamura, Yoichi, Inoue, Akio, Kawabe, Ryohei, Oshima, Tai, Hatsukade, Bunyo, Takekoshi, Tatsuya, Yoshimura, Yuki, Umehata, Hideki, Dannerbauer, Helmut, Cicone, Claudia, Bertoldi, Frank

    Astro2020: Decadal Survey on Astronomy and Astrophysics     2019.5

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    Recent ALMA detection of the bright [OIII] 88 um line at z = 9.11, indicates the onset of star formation at z 15. In order to uncover a large number of z=10-15 galaxies, we argue two possible pathways: (1) a blind spectroscopic survey of [OIII] 88 um line emitters, and (2) a high-cadence survey of transient sources to catch the pop-III GRBs. <P />...

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  93. Environmental impacts on molecular gas in protocluster galaxies at z ̃ 2 Reviewed

    Tadaki, Ken-ichi, Kodama, Tadayuki, Hayashi, Masao, Shimakawa, Rhythm, Koyama, Yusei, Lee, Minju, Tanaka, Ichi, Hatsukade, Bunyo, Iono, Daisuke, Kohno, Kotaro, Matsuda, Yuichi, Suzuki, Tomoko L., Tamura, Yoichi, Toshikawa, Jun, Umehata, Hideki

    Publications of the Astronomical Society of Japan   Vol. 71 ( 2 ) page: 40   2019.4

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    We present the results from ALMA CO(3-2) observations of 66 Hα-selected galaxies in three protoclusters around radio galaxies: PKS 1138-262 (z = 2.16), USS 1558-003 (z = 2.53), and 4C 23.56 (z = 2.49). The pointing areas have an overdensity of ̃100 compared to the mean surface number density of galaxies in field environments. We detect the CO emission line in 16 star-forming galaxies, including six previously published galaxies, to measure the molecular gas mass. In the stellar mass range of 10.5 &lt; log (M<SUB>star</SUB>/M<SUB>☉</SUB>) &lt; 11.0, the protocluster galaxies have larger gas mass fractions and longer gas depletion timescales compared to the scaling relations established for field galaxies. On the other hand, the amounts of molecular gas in more massive galaxies with log (M<SUB>star</SUB>/M<SUB>☉</SUB>) &gt; 11.0 are comparable in mass to the scaling relation, or smaller. Our results suggest that the environmental effects on gas properties are mass dependent: in high-density environments, gas accretion through cosmic filaments is accelerated in less massive galaxies, while this is suppressed in the most massive system....

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  94. The Excitation State of Galactic Diffuse Molecular Gas, Investigated with ALMA Observations of Multi-transition Absorption Lines Reviewed

    Ryo Ando, Kotaro Kohno, Hideki Umehata, Takuma Izumi, Shun Ishii, Yuri Nishimura, Kazuo Sorai, Tomoka Tosaki, Akio Taniguchi, Yoichi Tamura

    The Astrophysical Journal   Vol. 871 ( 2 )   2019.2

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  95. ALMA twenty-six arcmin<SUP>2</SUP> survey of GOODS-S at one millimeter (ASAGAO): Source catalog and number counts Reviewed

    Hatsukade, Bunyo, Kohno, Kotaro, Yamaguchi, Yuki, Umehata, Hideki, Ao, Yiping, Aretxaga, Itziar, Caputi, Karina I., Dunlop, James S., Egami, Eiichi, Espada, Daniel, Fujimoto, Seiji, Hayatsu, Natsuki H., Hughes, David H., Ikarashi, Soh, Iono, Daisuke, Ivison, Rob J., Kawabe, Ryohei, Kodama, Tadayuki, Lee, Minju, Matsuda, Yuichi, Nakanishi, Kouichiro, Ohta, Kouji, Ouchi, Masami, Rujopakarn, Wiphu, Suzuki, Tomoko, Tamura, Yoichi, Ueda, Yoshihiro, Wang, Tao, Wang, Wei-Hao, Wilson, Grant W., Yoshimura, Yuki, Yun, Min S.

    Publications of the Astronomical Society of Japan   Vol. 70 ( 6 ) page: 239 - 240   2018.12

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    We present the survey design, data reduction, construction of images, and source catalog of the Atacama Large Millimeter/submillimeter Array (ALMA) twenty-six arcmin<SUP>2</SUP> survey of GOODS-S at one millimeter (ASAGAO). ASAGAO is a deep (1 σ depth ̃ 61 μJy beam<SUP>-1</SUP> for a 250 kλ-tapered map with a synthesized beam size of 0{^''<SUB>.</SUB>}51 × 0{^''<SUB>.</SUB>}45) and wide area (26 arcmin<SUP>2</SUP>) survey on a contiguous field at 1.2 mm. By combining with ALMA archival data in the GOODS-South field, we obtained a deeper map in the same region (1 σ depth ̃ 30 μJy beam<SUP>-1</SUP> for a deep region with a 250 kλ-taper, and a synthesized beam size of 0{^''<SUB>.</SUB>}59 × 0{^''<SUB>.</SUB>}53), providing the largest sample of sources (25 sources at ≥5.0 σ, 45 sources at ≥4.5 σ) among ALMA blank-field surveys to date. The number counts show that 52^{+11}_{-8}% of the extragalactic background light at 1.2 mm is resolved into discrete sources at S<SUB>1.2 mm</SUB> &gt; 135 μJy. We create infrared (IR) luminosity functions (LFs) in the redshift range of z = 1-3 from the ASAGAO sources with K<SUB>s</SUB>-band counterparts, and constrain the faintest luminosity of the LF at 2.0 &lt; z &lt; 3.0. The LFs are consistent with previous results based on other ALMA and SCUBA-2 observations, which suggest a positive luminosity evolution and negative density evolution with increasing redshift. We find that obscured star-formation of sources with IR luminosities of log (L<SUB>IR</SUB>/L<SUB>☉</SUB>) ≳ 11.8 account for ≈60%-90% of the z ̃ 2 cosmic star-formation rate density....

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  96. Development of Multi-temperature Calibrator for the TES Bolometer Camera: System Design Reviewed

    Takekoshi, Tatsuya, Ohtawara, Kazushige, Oshima, Tai, Ishii, Shun, Izumi, Natsuko, Izumi, Takuma, Yamaguchi, Masayuki, Suzuki, Shunta, Muraoka, Kazuyuki, Hirota, Akihiko, Saito, Fumiaki, Nakatsubo, Shunichi, Kouchi, Akira, Ito, Tetsuya, Uemizu, Kazunori, Fujii, Yasunori, Tamura, Yoichi, Kohno, Kotaro, Kawabe, Ryohei

    Journal of Low Temperature Physics   Vol. 193 ( 5-6 ) page: 1003 - 1009   2018.12

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    We developed a simple add-on, cryogen-free, and low-power consumption calibrator for a new transition-edge sensor (TES) bolometer camera mounted on the ASTE 10-m telescope. To measure the responsivity of the TES bolometers and accurately correct for the nonlinearity and atmospheric extinction, we designed a motor-driven rotating filter wheel system installed in front of the cryostat window. This calibrator is required to cover the loading power under various atmospheric conditions, which corresponds to precipitable water vapor (PWV) of 0.5-4 mm. For this range of PWV, 25-100 K blackbodies are necessary for the observing bands of 1.1 and 0.85 mm. To simulate the temperature range, bolometers in the cryostat are also optically coupled to the low-temperature stage (&lt;4 K) inside the cryostat by spherical mirrors. In addition, we used moderately absorptive polystyrene plates that are placed between a spherical mirror and the cryostat window. Various combinations of filters result in eight different temperatures by the filter wheel system and simulate the atmospheric emission under various weather conditions at the ASTE site. <P />...

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  97. Development of Multi-temperature Calibrator for the TES Bolometer Camera: Deployment at ASTE Reviewed

    Oshima, Tai, Ohtawara, Kazushige, Takekoshi, Tatsuya, Ishii, Shun, Izumi, Natsuko, Izumi, Takuma, Yamaguchi, Masayuki, Suzuki, Shunta, Muraoka, Kazuyuki, Hirota, Akihiko, Saito, Fumiaki, Nakatsubo, Shunichi, Kouchi, Akira, Ito, Tetsuya, Uemizu, Kazunori, Fujii, Yasunori, Tamura, Yoichi, Kohno, Kotaro, Kawabe, Ryohei

    Journal of Low Temperature Physics   Vol. 193 ( 5-6 ) page: 996 - 1002   2018.12

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    We developed and deployed a simple add-on multi-temperature calibrator for our multicolor transition edge sensor (TES) bolometer camera aimed at simultaneous observation with observing wavelengths of 1.1 and 0.85 mm. To cover the power loading level from the atmospheric emission corresponding to precipitable water vapor (PWV) of 0.5-4 mm, the calibrator consists of spherical mirrors to show the low-temperature stages of the cryostat and filters with moderate opacity to mimic the eight-temperature cold blackbodies. The loading powers introduced by each filter were self-calibrated by measuring the load curves of the TES bolometers when a filter was placed in front of the cryostat window. Each science observation was preceded by the calibration process, which measures the response of the TES bolometers to the atmosphere and filters of various opacities. Then, the responsivities of TES bolometers were derived to convert their output signal to the loading power and correct for the nonlinearity inherent in its response. Furthermore, the loading power falling on the TES bolometers from atmospheric emission measured at various PWV was in good correlation with the PWV measured with the radiometer, which enables the atmospheric extinction correction by fast and sensitive bolometers compared to the available radiometers with the modest sampling speeds. <P />...

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  98. The distribution and physical properties of high-redshift [O III] emitters in a cosmological hydrodynamics simulation Reviewed

    Moriwaki, Kana, Yoshida, Naoki, Shimizu, Ikkoh, Harikane, Yuichi, Matsuda, Yuichi, Matsuo, Hiroshi, Hashimoto, Takuya, Inoue, Akio K., Tamura, Yoichi, Nagao, Tohru

    Monthly Notices of the Royal Astronomical Society   Vol. 481 ( 1 ) page: L84 - L88   2018.11

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    Recent observations with the Atacama Large Millimeter/submillimeter Array (ALMA) detected far-infrared emission lines such as the [O III] 88 μ m line from galaxies at z ̃ 7-9. We use a cosmological simulation of galaxy formation to study the physical properties of [O III] 88 μ m emitters. In a comoving volume of 50 h<SUP>-1</SUP> Mpc on a side, we locate 34 galaxies with stellar masses greater than 10^8 M_{☉} at z = 9, and more than 270 such galaxies at z = 7. We calculate the [O III] 88 μ m luminosities (L_{O III}, 88) by combining a physical model of H II regions with emission line calculations using the photoionization code CLOUDY. We show that the resulting L_{O III}, 88, for a given star formation rate, is slightly higher than predicted from the empirical relation for local galaxies, and is consistent with recent observations of galaxies at redshifts 7-9. Bright [O III] emitters with L_{O III}, 88 &gt; 10^8 L_{☉} have star formation rates higher than 3 M_{☉} yr^{-1}, and the typical metallicity is {̃ } 0.1 Z_{☉}. The galaxies are hosted by dark matter haloes with masses greater than 10^{11} M_{☉}. We propose to use the [O III] 5007 Å line, to be detected by James Webb Space Telescope, to study the properties of galaxies whose [O III] 88 μ m line emission has been already detected with ALMA....

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  99. Extremely Dense Cores Associated with Chandra Sources in Ophiuchus A: Forming Brown Dwarfs Unveiled? Reviewed

    Kawabe, Ryohei, Hara, Chihomi, Nakamura, Fumitaka, Saigo, Kazuya, Kamazaki, Takeshi, Shimajiri, Yoshito, Tomida, Kengo, Takakuwa, Shigehisa, Tsuboi, Yohko, Machida, Masahiro N., Di Francesco, James, Friesen, Rachel, Hirano, Naomi, Oasa, Yumiko, Tamura, Motohide, Tamura, Yoichi, Tsukagoshi, Takashi, Wilner, David

    The Astrophysical Journal   Vol. 866 ( 2 )   2018.10

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    On the basis of various data such as ALMA, JVLA, Chandra, Herschel, and Spitzer, we confirmed that two protostellar candidates in Oph A are bona fide protostars or proto-brown dwarfs (proto-BDs) in extremely early evolutionary stages. Both objects are barely visible across infrared (IR; i.e., near-IR to far-IR) bands. The physical nature of the cores is very similar to that expected in first hydrostatic cores (FHSCs), objects theoretically predicted in the evolutionary phase prior to stellar core formation with gas densities of ̃10<SUP>11-12</SUP> cm<SUP>-3</SUP>. This suggests that the evolutionary stage is close to the FHSC formation phase. The two objects are associated with faint X-ray sources, suggesting that they are in very early phase of stellar core formation with magnetic activity. In addition, we found the CO outflow components around both sources, which may originate from the young outflows driven by these sources. The masses of these objects are calculated to be ̃0.01-0.03 M <SUB>☉</SUB> from the dust continuum emission. These physical properties are consistent with that expected from the numerical model of forming brown dwarfs. These facts (the X-ray detection, CO outflow association, and FHSC-like spectral energy distributions) strongly indicate that the two objects are proto-BDs or will be in the very early phase of protostars, which will evolve to more massive protostars if they gain enough mass from their surroundings. The ages of these two objects are likely to be within ̃10<SUP>3</SUP> years after the protostellar core (or second core) formation, taking into account the outflow dynamical times (≲500 years)....

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  100. Detections of [OIII] 88 $\mu$m in Two Quasars in the Reionization Epoch Reviewed

    Hashimoto, Takuya, Inoue, Akio K., Tamura, Yoichi, Matsuo, Hiroshi, Mawatari, Ken, Yamaguchi, Yuki

        2018.10

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    With the Atacama Large Millimeter/sub-millimeter Array (ALMA), we report detections of the far-infrared (FIR) [OIII] 88 $\mu$m line and the underlying dust continuum in the two quasars in the reionization epoch, J205406.48-000514.8 (hereafter J2054-0005) at $z=6.0391\pm0.0002$ and J231038.88+185519.7 (hereafter J2310+1855) at $z=6.0035\pm0.0007$. The [OIII] luminosity of J2054-0005 and J2310+1855 are $L_{\rm [OIII]} = (6.8\pm0.6) \times 10^{9}$ and $(2.4\pm0.6) \times 10^{9}$ $L_{\rm \odot}$, corresponding to $\approx$ 0.05\%\ and 0.01\%\ of the total infrared luminosity, $L_{\rm TIR}$, respectively. Combining these [OIII] luminosities with [CII] 158 $\mu$m luminosities in the literature, we find that J2054-0005 and J2310+1855 have the [OIII]-to-[CII] luminosity ratio of $2.1\pm0.4$ and $0.3\pm0.1$, respectively, the latter of which is the lowest among objects so far reported at $z&gt;6$. Combining [OIII] observations at $z\approx6-9$ from our study and the literature, we identify the [OIII] line deficit: objects with larger $L_{\rm TIR}$ have lower $L_{\rm [OIII]}$-to-$L_{\rm TIR}$ ratios. Furthermore, we also find that the anti-correlation is shifted toward higher $L_{\rm TIR}$ value when compared to the local [OIII] line deficit. <P />...

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  101. AzTEC 1.1 mm observations of high-z protocluster environments: SMG overdensities and misalignment between AGN jets and SMG distribution Reviewed

    Zeballos, M., Aretxaga, I., Hughes, D. H., Humphrey, A., Wilson, G. W., Austermann, J., Dunlop, J. S., Ezawa, H., Ferrusca, D., Hatsukade, B., Ivison, R. J., Kawabe, R., Kim, S., Kodama, T., Kohno, K., Montaña, A., Nakanishi, K., Plionis, M., Sánchez-Argüelles, D., Stevens, J. A., Tamura, Y., Velazquez, M., Yun, M. S.

    Monthly Notices of the Royal Astronomical Society     2018.10

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    We present observations at 1.1 mm towards 16 powerful radio galaxies and a radio-quiet quasar at 0.5 &lt; z &lt; 6.3 acquired with the AzTEC camera mounted at the James Clerk Maxwell Telescope and Atacama Submillimeter Telescope Experiment to study the spatial distribution of submillimetre galaxies (SMGs) towards possible protocluster regions. The survey covers a total area of 1.01 sq deg with rms depths of 0.52-1.44 mJy and detects 728 sources above 3σ. We find overdensities of a factor of ̃2 in the source counts of three individual fields (4C+23.56, PKS1138-262, and MRC0355-037) over areas of ̃200 sq deg. When combining all fields, the source-count analysis finds an overdensity that reaches a factor ≳3 at S<SUB>1.1mm</SUB> ≥ 4 mJy covering a 1.5-arcmin-radius area centred on the active galactic nucleus. The large size of our maps allows us to establish that beyond a radius of 1.5 arcmin, the radial surface density of SMGs falls to that of a blank field. In addition, we find a trend for SMGs to align closely to a perpendicular direction with respect to the radio jets of the powerful central radio galaxies (73_{+13}^{-14} deg). This misalignment is found over projected comoving scales of 4-20 Mpc, departs from perfect alignment (0 deg) by ̃5σ, and apparently has no dependence on SMG luminosity. Under the assumption that the AzTEC sources are at the redshift of the central radio galaxy, the misalignment reported here can be interpreted as SMGs preferentially inhabiting mass-dominant filaments funnelling material towards the protoclusters, which are also the parent structures of the radio galaxies. <P />...

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  102. The gravitationally unstable gas disk of a starburst galaxy 12 billion years ago Reviewed

    Tadaki, K., Iono, D., Yun, M. S., Aretxaga, I., Hatsukade, B., Hughes, D. H., Ikarashi, S., Izumi, T., Kawabe, R., Kohno, K., Lee, M., Matsuda, Y., Nakanishi, K., Saito, T., Tamura, Y., Ueda, J., Umehata, H., Wilson, G. W., Michiyama, T., Ando, M., Kamieneski, P.

    Nature   Vol. 560 ( 7720 ) page: 613 - +   2018.8

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    Galaxies in the early Universe that are bright at submillimetre wavelengths (submillimetre-bright galaxies) are forming stars at a rate roughly 1,000 times higher than the Milky Way. A large fraction of the new stars form in the central kiloparsec of the galaxy<SUP>1-3</SUP>, a region that is comparable in size to the massive, quiescent galaxies found at the peak of cosmic star-formation history<SUP>4</SUP> and the cores of present-day giant elliptical galaxies. The physical and kinematic properties inside these compact starburst cores are poorly understood because probing them at relevant spatial scales requires extremely high angular resolution. Here we report observations with a linear resolution of 550 parsecs of gas and dust in an unlensed, submillimetre-bright galaxy at a redshift of z = 4.3, when the Universe was less than two billion years old. We resolve the spatial and kinematic structure of the molecular gas inside the heavily dust-obscured core and show that the underlying gas disk is clumpy and rotationally supported (that is, its rotation velocity is larger than the velocity dispersion). Our analysis of the molecular gas mass per unit area suggests that the starburst disk is gravitationally unstable, which implies that the self-gravity of the gas is stronger than the differential rotation of the disk and the internal pressure due to stellar-radiation feedback. As a result of the gravitational instability in the disk, the molecular gas would be consumed by star formation on a timescale of 100 million years, which is comparable to gas depletion times in merging starburst galaxies<SUP>5</SUP>....

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  103. ALMA deep field in SSA22: Survey design and source catalog of a 20 arcmin<SUP>2</SUP> survey at 1.1 mm Reviewed

    Umehata, Hideki, Hatsukade, Bunyo, Smail, Ian, Alexander, David M., Ivison, Rob J., Matsuda, Yuichi, Tamura, Yoichi, Kohno, Kotaro, Kato, Yuta, Hayatsu, Natsuki H., Kubo, Mariko, Ikarashi, Soh

    Publications of the Astronomical Society of Japan   Vol. 70 ( 4 )   2018.8

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    To search for dust-obscured star-formation activity in the early Universe, it is essential to obtain a deep and wide submillimeter/millimeter map. The advent of the Atacama Large Millimeter/submillimeter Array (ALMA) has enabled us to obtain such maps with sufficiently high spatial resolution to be free from source confusion. We present a new 1.1 mm-wave map obtained by ALMA in the SSA22 field. The field contains a remarkable proto-cluster at z = 3.09; therefore, it is an ideal region to investigate the role of a large-scale cosmic web on dust-obscured star formation. The typical 1σ depth of our map is 73 μJy beam<SUP>-1</SUP> with a {0^{^''<SUB>.</SUB>}5} resolution. Combining the present survey with earlier, archived observations, we map an area of 20 arcmin<SUP>2</SUP> (71 comoving Mpc<SUP>2</SUP> at z = 3.09). Within the combined survey area we have detected 35 sources at a signal-to-noise ratio (S/N) &gt;5, with flux densities of S<SUB>1.1mm</SUB> = 0.43-5.6 mJy, equivalent to star-formation rates of ≳100-1000 M<SUB>☉</SUB> yr<SUP>-1</SUP> at z = 3.09, for a Chabrier initial mass function: 17 sources out of 35 are new detections. The cumulative number counts show an excess by a factor of three to five compared to blank fields. The excess suggests enhanced, dust-enshrouded star-formation activity in the proto-cluster on a 10 comoving Mpc scale, indicating accelerated galaxy evolution in this overdense region....

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  104. ALMA 26 Arcmin<SUP>2</SUP> Survey of GOODS-S at One Millimeter (ASAGAO): Average Morphology of High-z Dusty Star-forming Galaxies in an Exponential Disk (n ≃ 1) Reviewed

    Fujimoto, Seiji, Ouchi, Masami, Kohno, Kotaro, Yamaguchi, Yuki, Hatsukade, Bunyo, Ueda, Yoshihiro, Shibuya, Takatoshi, Inoue, Shigeki, Oogi, Taira, Toft, Sune, Gómez-Guijarro, Carlos, Wang, Tao, Espada, Daniel, Nagao, Tohru, Tanaka, Ichi, Ao, Yiping, Umehata, Hideki, Taniguchi, Yoshiaki, Nakanishi, Kouichiro, Rujopakarn, Wiphu, Ivison, R. J., Wang, Wei-hao, Lee, Minju M., Tadaki, Ken-ichi, Tamura, Yoichi, Dunlop, J. S.

    The Astrophysical Journal   Vol. 861 ( 1 )   2018.7

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    We present morphological properties of dusty star-forming galaxies at z = 1-3 determined with the high-resolution (FWHM ̃ 0.″19) Atacama Large Milllimeter/submillimeter Array (ALMA) 1 mm map of our ASAGAO survey covering a 26 arcmin<SUP>2</SUP> area in GOODS-S. In conjunction with the ALMA archival data, our sample consists of 45 ALMA sources with infrared luminosity (L <SUB>IR</SUB>) range of ̃10<SUP>11</SUP>-10<SUP>13</SUP> L <SUB>☉</SUB>. To obtain an average rest-frame far-infrared (FIR) profile, we perform individual measurements and careful stacking of the ALMA sources using the uv-visibility method that includes positional-uncertainty and smoothing-effect evaluations through Monte Carlo simulations. We find that our sample has an average FIR-wavelength Sérsic index and effective radius of n <SUB>FIR</SUB> = 1.2 ± 0.2 and R <SUB>e,FIR</SUB> = 1.0-1.3 kpc, respectively, additionally with a point-source component at the center, indicative of the existence of active galactic nuclei. The average FIR profile agrees with a morphology of an exponential disk clearly distinguished from a de Vaucouleurs spheroidal profile (Sérsic index of 4). We also examine the rest-frame optical Sérsic index n <SUB>opt</SUB> and effective radius R <SUB>e,opt</SUB> with deep Hubble Space Telescope (HST) images. Interestingly, we obtain n <SUB>opt</SUB> = 0.9 ± 0.3 (≃n <SUB>FIR</SUB>) and R <SUB>e,opt</SUB> = 3.2 ± 0.6 kpc (&gt;R <SUB>e,FIR</SUB>), suggesting that the dusty disk-like structure is embedded within a larger stellar disk. The rest-frame UV and FIR data of HST and ALMA provide us with a radial profile of the total star formation rate (SFR), where the infrared SFR dominates over the UV SFR at the center. Under the assumption of a constant SFR, a compact stellar distribution in z ̃ 1-2 compact quiescent galaxies (cQGs) is well reproduced, while a spheroidal stellar morphology of cQGs (n <SUB>opt</SUB> = 4) is not, suggestive of other important mechanism(s) such as dynamical dissipation....

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  105. Laboratory performance evaluation of the mid-infrared camera and spectrograph MIMIZUKU for the TAO 6.5-m telescope

    Kamizuka, Takafumi, Uchiyama, Masahito S, Yamaguchi, Jumpei, Mori, Tomohiro, Ohsawa, Ryou, Yoshida, Yutaka, Sako, Shigeyuki, Miyata, Takashi, Asano, Kentaro, Uchiyama, Mizuho, Sakon, Itsuki, Onaka, Takashi, Kataza, Hirokazu, Aoki, Tsutomu, Doi, Mamoru, Hatsukade, Bunyo, Kato, Natsuko, Kohno, Kotaro, Konishi, Masahiro, Minezaki, Takeo, Morokuma, Tomoki, Motohara, Kentaro, Soyano, Takao, Takahashi, Hidenori, Tanabe, Toshihiko, Tanaka, Masuo, Tarusawa, Ken'ichi, Tamura, Yoichi, Koshida, Shintaro, Terao, Yasunori, Ohashi, Hirofumi, Kono, Yukihiro, Kushibiki, Kosuke, Yoshii, Yuzuru

    Society of Photo-Optical Instrumentation Engineers (SPIE) Conference Series   Vol. 10702   page: 107022H   2018.7

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    The Mid-Infrared Multi-field Imager for gaZing at the UnKnown Universe (MIMIZUKU) is a mid-infrared camera and spectrograph developed as a first-generation instrument on the University of Tokyo Atacama Observatory (TAO) 6.5-m telescope. MIMIZUKU covers a wide wavelength range from 2 to 38 pm and has a unique optical device called Field Stacker which realizes accurate calibration of variable atmospheric transmittance with a few percent accuracy. By utilizing these capabilities, MIMIZUKU realizes mid-infrared long-term monitoring, which has not been challenged well.MIMIZUKU has three optical channels, called NIR, MIR-S, and MIR-L, to realize the wide wavelength coverage. The MIR-S channel, which covers 6.8-26 pm, has been completed by now. We are planning to perform engineering observations with this channel at the Subaru telescope before the completion of the TAO 6.5-m telescope. In this paper, we report the results of the laboratory tests to evaluate the optical and detector performances of the MIR-S channel. As a result, we confirmed a pixel scale of 0.12 arcsec/pix and a vignetting free field of view of 2.10 x1.18. The instrument throughputs for imaging modes are measured to be 20-30%. Those for N- and Q-band spectroscopy modes are 17 and 5%, respectively. As for the detector performance, we derived the quantum efficiency to be 40-50% in the mid-infrared wavelength region and measured the readout noise to be 3000-6000 electrons, which are larger than the spec value. It was found that this large readout noise degrades the sensitivity of MIMIZUKU by a factor of two.

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  106. Subaru High-z Exploration of Low-Luminosity Quasars (SHELLQs). III. Star formation properties of the host galaxies at z ≳ 6 studied with ALMA Reviewed

    Izumi, Takuma, Onoue, Masafusa, Shirakata, Hikari, Nagao, Tohru, Kohno, Kotaro, Matsuoka, Yoshiki, Imanishi, Masatoshi, Strauss, Michael A., Kashikawa, Nobunari, Schulze, Andreas, Silverman, John D., Fujimoto, Seiji, Harikane, Yuichi, Toba, Yoshiki, Umehata, Hideki, Nakanishi, Kouichiro, Greene, Jenny E., Tamura, Yoichi, Taniguchi, Akio, Yamaguchi, Yuki, Goto, Tomotsugu, Hashimoto, Yasuhiro, Ikarashi, Soh, Iono, Daisuke, Iwasawa, Kazushi, Lee, Chien-Hsiu, Makiya, Ryu, Minezaki, Takeo, Tang, Ji-Jia

    Publications of the Astronomical Society of Japan   Vol. 70 ( 3 )   2018.6

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    We present our ALMA Cycle 4 measurements of the [C II] emission line and the underlying far-infrared (FIR) continuum emission from four optically low-luminosity (M<SUB>1450</SUB> &gt; -25) quasars at z ≳ 6 discovered by the Subaru Hyper Suprime Cam (HSC) survey. The [C II] line and FIR continuum luminosities lie in the ranges L_[C II] = (3.8-10.2)× 10<SUP>8</SUP> L_{☉} and L<SUB>FIR</SUB> = (1.2-2.0) × 10<SUP>11</SUP> L_{☉}, which are at least one order of magnitude smaller than those of optically-luminous quasars at z ≳ 6. We estimate the star formation rates (SFRs) of our targets as ≃ 23-40 M_{☉} yr<SUP>-1</SUP>. Their line and continuum-emitting regions are marginally resolved, and found to be comparable in size to those of optically-luminous quasars, indicating that their SFR or likely gas mass surface densities (key controlling parameter of mass accretion) are accordingly different. The L_[C II}]}/L_FIR ratios of the hosts, ≃ (2.2-8.7) × 10<SUP>-3</SUP>, are fully consistent with local star-forming galaxies. Using the [C II] dynamics, we derived their dynamical masses within a radius of 1.5-2.5 kpc as ≃ (1.4-8.2) × 10<SUP>10</SUP> M_{☉}. By interpreting these masses as stellar ones, we suggest that these faint quasar hosts are on or even below the star-forming main sequence at z ̃ 6, i.e., they appear to be transforming into quiescent galaxies. This is in contrast to the optically-luminous quasars at those redshifts, which show starburst-like properties. Finally, we find that the ratios of black hole mass to host galaxy dynamical mass of most of the low-luminosity quasars, including the HSC ones, are consistent with the local value. The mass ratios of the HSC quasars can be reproduced by a semi-analytical model that assumes merger-induced black hole host galaxy evolution....

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  107. Obscured Star Formation in the Host Galaxies of Superluminous Supernovae Reviewed

    B. Hatsukade, N. Tominaga, M. Hayashi, M. Konishi, Y. Matsuda, T. Morokuma, K. Morokuma-Matsui, K. Motogi, K. Niinuma, Y. Tamura

    The Astrophysical Journal   Vol. 857 ( 1 ) page: 72 - 72   2018.4

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  108. Molecular Gas Reservoirs in Cluster Galaxies at z = 1.46 Reviewed

    Masao Hayashi, Ken-ichi Tadaki, Tadayuki Kodama, Kotaro Kohno, Yuki Yamaguchi, Bunyo Hatsukade, Yusei Koyama, Rhythm Shimakawa, Yoichi Tamura, Tomoko L. Suzuki

    The Astrophysical Journal   Vol. 856 ( 2 ) page: 118 - 118   2018.4

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    We present molecular gas reservoirs of eighteen galaxies associated with the
    XMMXCS J2215.9-1738 cluster at z=1.46. From Band 7 and Band 3 data of the
    Atacama Large Millimeter/submillimeter Array (ALMA), we detect dust continuum
    emission at 870 um and CO J=2-1 emission line from 8 and 17 member galaxies
    respectively within a cluster-centric radius of $R_{200}$. The molecular gas
    masses derived from the CO and/or dust continuum luminosities show that the
    fraction of molecular gas mass and the depletion time scale for the cluster
    galaxies are larger than expected from the scaling relations of molecular gas
    on stellar mass and offset from the main sequence of star-forming galaxies in
    general fields. The galaxies closer to the cluster center in terms of both
    projected position and accretion phase seem to show a larger deviation from the
    scaling relations. We speculate that the environment of galaxy cluster helps
    feed the gas through inflow to the member galaxies and also reduce the
    efficiency of star formation. The stacked Band 3 spectrum of 12 quiescent
    galaxies with stellar mass $\sim10^{11}$ M$_\odot$ within 0.5$R_{200}$ shows no
    detection of CO emission line, giving the upper limit of molecular gas mass and
    molecular gas fraction to be $<10^{10}$ M$_\odot$ and $<10$%, respectively.
    Therefore, the massive galaxies in the cluster core quench the star formation
    activity while consuming most of the gas reservoirs.

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  109. ALMA 26 arcmin<SUP>2</SUP> Survey of GOODS-S at One-millimeter (ASAGAO): X-Ray AGN Properties of Millimeter-selected Galaxies Reviewed

    Ueda, Y., Hatsukade, B., Kohno, K., Yamaguchi, Y., Tamura, Y., Umehata, H., Akiyama, M., Ao, Y., Aretxaga, I., Caputi, K., Dunlop, J. S., Espada, D., Fujimoto, S., Hayatsu, N. H., Imanishi, M., Inoue, A. K., Ivison, R. J., Kodama, T., Lee, M. M., Matsuoka, K., Miyaji, T., Morokuma-Matsui, K., Nagao, T., Nakanishi, K., Nyland, K., Ohta, K., Ouchi, M., Rujopakarn, W., Saito, T., Tadaki, K., Tanaka, I., Taniguchi, Y., Wang, T., Wang, W. -H., Yoshimura, Y., Yun, M. S.

    The Astrophysical Journal   Vol. 853 ( 1 )   2018.1

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    We investigate the X-ray active galactic nucleus (AGN) properties of millimeter galaxies in the Great Observatories Origins Deep Survey South (GOODS-S) field detected with the Atacama Large Millimeter/submillimeter Array (ALMA), by utilizing the Chandra 7-Ms data, the deepest X-ray survey to date. Our millimeter galaxy sample comes from the ASAGAO survey covering 26 arcmin<SUP>2</SUP> (12 sources at a 1.2 mm flux-density limit of ≈ 0.6 mJy), supplemented by the deeper but narrower 1.3 mm survey of a part of the ASAGAO field by Dunlop et al. Ofthe 25 total millimeter galaxies, 14 have Chandra counterparts. The observed AGN fractions at z=1.5{--}3 are found to be {90}<SUB>-19</SUB><SUP>+8</SUP>% and {57}<SUB>-25</SUB><SUP>+23</SUP>% for the ultra-luminous and luminous infrared galaxies with log {L}<SUB>{IR</SUB>}/{L}<SUB>☉ </SUB> = 12-12.8 and log {L}<SUB>{IR</SUB>}/{L}<SUB>☉ </SUB> = 11.5-12, respectively. The majority (̃2/3) of the ALMA and/or Herschel detected X-ray AGNs at z = 1.5-3 appear to be star-formation-dominant populations, having {L}<SUB>{ { X</SUB> } }/ {L}<SUB>{IR</SUB>} ratios smaller than the “simultaneous evolution” value expected from the local black-hole-mass-to-stellar-mass ({M}<SUB>{BH</SUB>}-M <SUB>*</SUB>) relation. On the basis of the {L}<SUB>{ { X</SUB> } } and stellar mass relation, we infer that a large fraction of star-forming galaxies at z=1.5{--}3 have black hole masses that are smaller than those expected from the local {M}<SUB>{BH</SUB>}-M <SUB>*</SUB> relation. This contrasts previous reports on luminous AGNs at the same redshifts detected in wider and shallower surveys, which are subject to selection biases against lower luminosity AGNs. Our results are consistent with an evolutionary scenario in which star formation occurs first, and an AGN-dominant phase follows later, in objects that finally evolve into galaxies with classical bulges....

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  110. Development status of the simultaneous two-color near-infrared multi-object spectrograph SWIMS for the TAO 6.5m telescope

    Konishi, Masahiro, Motohara, Kentaro, Takahashi, Hidenori, Kato, Natsuko, Terao, Yasunori, Ohashi, Hirofumi, Kono, Yukihiro, Kushibiki, Kosuke, Kodama, Tadayuki, Hayashi, Masao, Tanaka, Ichi, Tadaki, Ken-ichi, Toshikawa, Jun, Koyama, Yusei, Shimakawa, Rhythm, Suzuki, Tomoko, Tateuchi, Ken, Kitagawa, Yutaro, Kobayakawa, Yutaka, Todo, Soya, Aoki, Tsutomu, Doi, Mamoru, Hatsukade, Bunyo, Kamizuka, Takafumi, Kohno, Kotaro, Minezaki, Takeo, Miyata, Takashi, Morokuma, Tomoki, Sako, Shigeyuki, Soyano, Takao, Tanabe, Toshihiko, Tanaka, Masuo, Tarusawa, Ken'ichi, Tamura, Yoichi, Koshida, Shintaro, Ohsawa, Ryou, Uchiyama, Masahito, Mori, Tomohiro, Yamaguchi, Jumpei, Yoshida, Yutaka, Yoshii, Yuzuru

    Society of Photo-Optical Instrumentation Engineers (SPIE) Conference Series   Vol. 10702   page: 1070226   2018

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  111. VizieR Online Data Catalog: mm-wave size study of ALMA submm galaxies (Ikarashi+, 2017) Reviewed

    Ikarashi} S, Caputi} K.~I, Ohta} K, Ivison} R.~J, Lagos} C.~D.~P, Bisigello} L, Hatsukade} B, Aretxaga} I, Dunlop} J.~S, Hughes} D.~H, Iono} D, Izumi} T, Kashikawa} N, Koyama} Y, Kawabe} R, Kohno} K, Motohara} K, Nakanishi} K, Tamura} Y, Umehata} H, Wilson} G.~W, Yabe} K, Yun} M

    VizieR Online Data Catalog     page: J/ApJ/849/L36   2018

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  112. Deep Submillimeter and Radio Observations in the SSA22 Field. I. Powering Sources and the Lyα Escape Fraction of Lyα Blobs Reviewed

    Ao, Y., Matsuda, Y., Henkel, C., Iono, D., Alexander, D. M., Chapman, S. C., Geach, J., Hatsukade, B., Hayes, M., Hine, N. K., Kato, Y., Kawabe, R., Kohno, K., Kubo, M., Lehnert, M., Malkan, M., Menten, K. M., Nagao, T., Norris, R. P., Ouchi, M., Saito, T., Tamura, Y., Taniguchi, Y., Umehata, H., Weiss, A.

    The Astrophysical Journal   Vol. 850 ( 2 )   2017.12

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    We study the heating mechanisms and Lyα escape fractions of 35 Lyα blobs (LABs) at z ≈ 3.1 in the SSA22 field. Dust continuum sources have been identified in 11 of the 35 LABs, all with star formation rates (SFRs) above 100 M <SUB>☉</SUB> yr<SUP>-1</SUP>. Likely radio counterparts are detected in 9 out of 29 investigated LABs. The detection of submillimeter dust emission is more linked to the physical size of the Lyα emission than to the Lyα luminosities of the LABs. A radio excess in the submillimeter/radio-detected LABs is common, hinting at the presence of active galactic nuclei. Most radio sources without X-ray counterparts are located at the centers of the LABs. However, all X-ray counterparts avoid the central regions. This may be explained by absorption due to exceptionally large column densities along the line-of-sight or by LAB morphologies, which are highly orientation dependent. The median Lyα escape fraction is about 3% among the submillimeter-detected LABs, which is lower than a lower limit of 11% for the submillimeter-undetected LABs. We suspect that the large difference is due to the high dust attenuation supported by the large SFRs, the dense large-scale environment as well as large uncertainties in the extinction corrections required to apply when interpreting optical data....

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  113. J-GEM observations of an electromagnetic counterpart to the neutron star merger GW170817 Reviewed

    Utsumi, Yousuke, Tanaka, Masaomi, Tominaga, Nozomu, Yoshida, Michitoshi, Barway, Sudhanshu, Nagayama, Takahiro, Zenko, Tetsuya, Aoki, Kentaro, Fujiyoshi, Takuya, Furusawa, Hisanori, Kawabata, Koji S, Koshida, Shintaro, Lee, Chien-Hsiu, Morokuma, Tomoki, Motohara, Kentaro, Nakata, Fumiaki, Ohsawa, Ryou, Ohta, Kouji, Okita, Hirofumi, Tajitsu, Akito, Tanaka, Ichi, Terai, Tsuyoshi, Yasuda, Naoki, Abe, Fumio, Asakura, Yuichiro, Bond, Ian A, Miyazaki, Shota, Sumi, Takahiro, Tristram, Paul J, Honda, Satoshi, Itoh, Ryosuke, Itoh, Yoichi, Kawabata, Miho, Morihana, Kumiko, Nagashima, Hiroki, Nakaoka, Tatsuya, Ohshima, Tomohito, Takahashi, Jun, Takayama, Masaki, Aoki, Wako, Baar, Stefan, Doi, Mamoru, Finet, Francois, Kanda, Nobuyuki, Kawai, Nobuyuki, Kim, Ji Hoon, Kuroda, Daisuke, Liu, Wei, Matsubayashi, Kazuya, Murata, Katsuhiro L, Nagai, Hiroshi, Saito, Tomoki, Saito, Yoshihiko, Sako, Shigeyuki, Sekiguchi, Yuichiro, Tamura, Yoichi, Tanaka, Masayuki, Uemura, Makoto, Yamaguchi, Masaki S

    Publications of the Astronomical Society of Japan   Vol. 69 ( 6 ) page: 101   2017.12

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    GW170817 is the first detected gravitational wave source from a neutron star merger. We present the Japanese collaboration for gravitational-wave electro-magnetic (J-GEM) follow-up observations of SSS17a, an electromagnetic counterpart of GW170817. SSS17a shows a 2.5mag decline in the z band during the period between 1.7 and 7.7 d after the merger. Such a rapid decline is not comparable with supernovae light curves at any epoch. The color of SSS17a also evolves rapidly and becomes redder during later epochs: the z - H color has changed by approximately 2.5mag during the period between 0.7 and 7.7 d. The rapid evolutions of both the color and the optical brightness are consistent with the expected properties of a kilonova that is powered by the radioactive decay of newly synthesized r-process nuclei. Kilonova models with Lanthanide elements can reproduce the aforementioned observed properties well, which suggests that r-process nucleosynthesis beyond the second peak takes place in SSS17a. However, the absolute magnitude of SSS17a is brighter than the expected brightness of the kilonova models with an ejectamass of 0.01M(circle dot), which suggests a more intensemass ejection (similar to 0.03M(circle dot)) or possibly an additional energy source.

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  114. Kilonova from post-merger ejecta as an optical and near-Infrared counterpart of GW170817 Reviewed

    Tanaka, Masaomi, Utsumi, Yousuke, Mazzali, Paolo A, Tominaga, Nozomu, Yoshida, Michitoshi, Sekiguchi, Yuichiro, Morokuma, Tomoki, Motohara, Kentaro, Ohta, Kouji, Kawabata, Koji S, Abe, Fumio, Aoki, Kentaro, Asakura, Yuichiro, Baar, Stefan, Barway, Sudhanshu, Bond, Ian A, Doi, Mamoru, Fujiyoshi, Takuya, Furusawa, Hisanori, Honda, Satoshi, Itoh, Yoichi, Kawabata, Miho, Kawai, Nobuyuki, Kim, Ji Hoon, Lee, Chien-Hsiu, Miyazaki, Shota, Morihana, Kumiko, Nagashima, Hiroki, Nagayama, Takahiro, Nakaoka, Tatsuya, Nakata, Fumiaki, Ohsawa, Ryou, Ohshima, Tomohito, Okita, Hirofumi, Saito, Tomoki, Sumi, Takahiro, Tajitsu, Akito, Takahashi, Jun, Takayama, Masaki, Tamura, Yoichi, Tanaka, Ichi, Terai, Tsuyoshi, Tristram, Paul J, Yasuda, Naoki, Zenko, Tetsuya

    Publications of the Astronomical Society of Japan   Vol. 69 ( 6 ) page: 102   2017.12

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    Recent detection of gravitational waves from a neutron star (NS) merger event GW170817 and identification of an electromagnetic counterpart provide a unique opportunity to study the physical processes in NS mergers. To derive properties of ejected material from the NS merger, we perform radiative transfer simulations of kilonova, optical and near-infrared emissions powered by radioactive decays of r-process nuclei synthesized in the merger. We find that the observed near-infrared emission lasting for &gt;10 d is explained by 0.03 M<SUB>☉</SUB> of ejecta containing lanthanide elements. However, the blue optical component observed at the initial phases requires an ejecta component with a relatively high electron fraction (Y<SUB>e</SUB>). We show that both optical and near-infrared emissions are simultaneously reproduced by the ejecta with a medium Y<SUB>e</SUB> of ̃0.25. We suggest that a dominant component powering the emission is post-merger ejecta, which exhibits that the mass ejection after the first dynamical ejection is quite efficient. Our results indicate that NS mergers synthesize a wide range of r-process elements and strengthen the hypothesis that NS mergers are the origin of r-process elements in the Universe. <P />...

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  115. Diverse Nuclear Star-forming Activities in the Heart of NGC 253 Resolved with 10-pc-scale ALMA Images Reviewed

    Ryo Ando, Kouichiro Nakanishi, Kotaro Kohno, Takuma Izumi, Sergio Martín, Nanase Harada, Shuro Takano, Nario Kuno, Naomasa Nakai, Hajime Sugai, Kazuo Sorai, Tomoka Tosaki, Kazuya Matsubayashi, Taku Nakajima, Yuri Nishimura, Yoichi Tamura

    The Astrophysical Journal   Vol. 849 ( 2 ) page: 81 - 81   2017.11

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    We present an 8 pc x 5 pc resolution view of the central ~ 200 pc region of
    the nearby starburst galaxy NGC 253, based on ALMA Band 7 ({\lambda} ~ 0.85 mm
    or {\nu} ~ 350 GHz) observations covering 11 GHz. We resolve the nuclear
    starburst of NGC 253 into eight dusty star-forming clumps, 10 pc in scale, for
    the first time. These clumps, each of which contains (4-10) x 10^4 M_sun of
    dust (assuming that the dust temperature is 25 K) and up to 6 x 10^2 massive
    (O5V) stars, appear to be aligned in two parallel ridges, while they have been
    blended in previous studies. Despite the similarities in sizes and dust masses
    of these clumps, their line spectra vary drastically from clump to clump
    although they are separated by only ~ 10 pc. Specifically, one of the clumps,
    Clump 1, exhibits line confusion-limited spectra with at least 36 emission
    lines from 19 molecules (including CH3OH, HNCO, H2CO, CH3CCH, H2CS, and H3O+)
    and a hydrogen recombination line (H26{\alpha}), while much fewer kinds of
    molecular lines are detected in some other clumps where fragile species, such
    as complex organic molecules and HNCO, completely disappear from their spectra.
    We demonstrate the existence of hot molecular gas ($T_rot (SO2) = 90 {\pm} 11
    K) in the former clump, which suggests that the hot and chemically rich
    environments are localized within a 10-pc scale star-forming clump.

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  116. Very Compact Millimeter Sizes for Composite Star-forming/AGN Submillimeter Galaxies Reviewed

    Soh Ikarashi, Karina I Caputi, Kouji Ohta, R. J. Ivison, Claudia D. P Lagos, Laura Bisigello, Bunyo Hatsukade, Itziar Aretxaga, James S Dunlop, David H Hughes, Daisuke Iono, Takuma Izumi, Nobunari Kashikawa, Yusei Koyama, Ryohei Kawabe, Kotaro Kohno, Kentaro Motohara, Kouichiro Nakanishi, Yoichi Tamura, Hideki Umehata, Grant W Wilson, Kiyoto Yabe, Min S Yun

    The Astrophysical Journal   Vol. 849 ( 2 ) page: L36 - L36   2017.11

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    We report the study of the far-infrared (IR) sizes of submillimeter galaxies (SMGs) in relation to their dust-obscured star formation rate (SFR) and active galactic nuclei (AGN) presence, determined using mid-IR photometry. We determined the millimeter-wave ({λ }<SUB>{obs</SUB>}=1100 μ m) sizes of 69 Atacama Large Millimeter/submillimeter Array (ALMA)-identified SMGs, selected with ≥slant 10σ confidence on ALMA images ({F}<SUB>1100μ { { m</SUB> } }=1.7-7.4 mJy). We found that all of the SMGs are located above an avoidance region in the size-flux plane, as expected by the Eddington limit for star formation. In order to understand what drives the different millimeter-wave sizes in SMGs, we investigated the relation between millimeter-wave size and AGN fraction for 25 of our SMGs at z = 1-3. We found that the SMGs for which the mid-IR emission is dominated by star formation or AGN have extended millimeter-sizes, with respective median {R}<SUB>{ { c</SUB>},{ { e } } }={1.6}<SUB>-0.21</SUB><SUP>+0.34</SUP> and {1.5}<SUB>-0.24</SUB><SUP>+0.93</SUP> kpc. Instead, the SMGs for which the mid-IR emission corresponds to star-forming/AGN composites have more compact millimeter-wave sizes, with median {R}<SUB>{ { c</SUB>},{ { e } } }={1.0}<SUB>-0.20</SUB><SUP>+0.20</SUP> kpc. The relation between millimeter-wave size and AGN fraction suggests that this size may be related to the evolutionary stage of the SMG. The very compact sizes for composite star-forming/AGN systems could be explained by supermassive black holes growing rapidly during the SMG coalescing, star-formation phase....

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  117. Multi-messenger Observations of a Binary Neutron Star Merger Reviewed

    B. P. Abbott, R. Abbott, T. D. Abbott, F. Acernese, K. Ackley, C. Adams, T. Adams, P. Addesso, R. X. Adhikari, V. B. Adya, C. Affeldt, M. Afrough, B. Agarwal, M. Agathos, K. Agatsuma, N. Aggarwal, O. D. Aguiar, L. Aiello, A. Ain, P. Ajith, B. Allen, G. Allen, A. Allocca, P. A. Altin, A. Amato, A. Ananyeva, S. B. Anderson, W. G. Anderson, S. V. Angelova, S. Antier, S. Appert, K. Arai, M. C. Araya, J. S. Areeda, N. Arnaud, K. G. Arun, S. Ascenzi, G. Ashton, M. Ast, S. M. Aston, P. Astone, D. V. Atallah, P. Aufmuth, C. Aulbert, K. AultONeal, C. Austin, A. Avila-Alvarez, S. Babak, P. Bacon, M. K. M. Bader, S. Bae, P. T. Baker, F. Baldaccini, G. Ballardin, S. W. Ballmer, S. Banagiri, J. C. Barayoga, S. E. Barclay, B. C. Barish, D. Barker, K. Barkett, F. Barone, B. Barr, L. Barsotti, M. Barsuglia, D. Barta, S. D. Barthelmy, J. Bartlett, I. Bartos, R. Bassiri, A. Basti, J. C. Batch, M. Bawaj, J. C. Bayley, M. Bazzan, B. Bécsy, C. Beer, M. Bejger, I. Belahcene, A. S. Bell, B. K. Berger, G. Bergmann, J. J. Bero, C. P. L. Berry, D. Bersanetti, A. Bertolini, J. Betzwieser, S. Bhagwat, R. Bhandare, I. A. Bilenko, G. Billingsley, C. R. Billman, J. Birch, R. Birney, O. Birnholtz, S. Biscans, S. Biscoveanu, A. Bisht, M. Bitossi, C. Biwer, M. A. Bizouard, J. K. Blackburn, J. Blackman, C. D. Blair, D. G. Blair, R. M. Blair, S. Bloemen, O. Bock, N. Bode, M. Boer, G. Bogaert, A. Bohe, F. Bondu, E. Bonilla, R. Bonnand, B. A. Boom, R. Bork, V. Boschi, S. Bose, K. Bossie, Y. Bouffanais, A. Bozzi, C. Bradaschia, P. R. Brady, M. Branchesi, J. E. Brau, T. Briant, A. Brillet, M. Brinkmann, V. Brisson, P. Brockill, J. E. Broida, A. F. Brooks, D. A. Brown, D. D. Brown, S. Brunett, C. C. Buchanan, A. Buikema, T. Bulik, H. J. Bulten, A. Buonanno, D. Buskulic, C. Buy, R. L. Byer, M. Cabero, L. Cadonati, G. Cagnoli, C. Cahillane, J. Calderón Bustillo, T. A. Callister, E. Calloni, J. B. Camp, M. Canepa, P. Canizares, K. C. Cannon, H. Cao, J. Cao, C. D. Capano, E. Capocasa, F. Carbognani, S. Caride, M. F. Carney, J. Casanueva Diaz, C. Casentini, S. Caudill, M. Cavaglià, F. Cavalier, R. Cavalieri, G. Cella, C. B. Cepeda, P. Cerdá-Durán, G. Cerretani, E. Cesarini, S. J. Chamberlin, M. Chan, S. Chao, P. Charlton, E. Chase, E. Chassande-Mottin, D. Chatterjee, K. Chatziioannou, B. D. Cheeseboro, H. Y. Chen, X. Chen, Y. Chen, H.-P. Cheng, H. Chia, A. Chincarini, A. Chiummo, T. Chmiel, H. S. Cho, M. Cho, J. H. Chow, N. Christensen, Q. Chu, A. J. K. Chua, S. Chua, A. K. W. Chung, S. Chung, G. Ciani, R. Ciolfi, C. E. Cirelli, A. Cirone, F. Clara, J. A. Clark, P. Clearwater, F. Cleva, C. Cocchieri, E. Coccia, P.-F. Cohadon, D. Cohen, A. Colla, C. G. Collette, L. R. Cominsky, M. Constancio Jr., L. Conti, S. J. Cooper, P. Corban, T. R. Corbitt, I. Cordero-Carrión, K. R. Corley, N. Cornish, A. Corsi, S. Cortese, C. A. Costa, M. W. Coughlin, S. B. Coughlin, J.-P. Coulon, S. T. Countryman, P. Couvares, P. B. Covas, E. E. Cowan, D. M. Coward, M. J. Cowart, D. C. Coyne, R. Coyne, J. D. E. Creighton, T. D. Creighton, J. Cripe, S. G. Crowder, T. J. Cullen, A. Cumming, L. Cunningham, E. Cuoco, T. Dal Canton, G. Dálya, S. L. Danilishin, S. D’Antonio, K. Danzmann, A. Dasgupta, C. F. Da Silva Costa, V. Dattilo, I. Dave, M. Davier, D. Davis, E. J. Daw, B. Day, S. De, D. DeBra, J. Degallaix, M. De Laurentis, S. Deléglise, W. Del Pozzo, N. Demos, T. Denker, T. Dent, R. De Pietri, V. Dergachev, R. De Rosa, R. T. DeRosa, C. De Rossi, R. DeSalvo, O. de Varona, J. Devenson, S. Dhurandhar, M. C. Díaz, L. Di Fiore, M. Di Giovanni, T. Di Girolamo, A. Di Lieto, S. Di Pace, I. Di Palma, F. Di Renzo, Z. Doctor, V. Dolique, F. Donovan, K. L. Dooley, S. Doravari, I. Dorrington, R. Douglas, M. Dovale Álvarez, T. P. Downes, M. Drago, C. Dreissigacker, J. C. Driggers, Z. Du, M. Ducrot, P. Dupej, S. E. Dwyer, T. B. Edo, M. C. Edwards, A. Effler, P. Ehrens, J. Eichholz, S. S. Eikenberry, R. A. Eisenstein, R. C. Essick, D. Estevez, Z. B. Etienne, T. Etzel, M. Evans, T. M. Evans, M. Factourovich, V. Fafone, H. Fair, S. Fairhurst, X. Fan, S. Farinon, B. Farr, W. M. Farr, E. J. Fauchon-Jones, M. Favata, M. Fays, C. Fee, H. Fehrmann, J. Feicht, M. M. Fejer, A. Fernandez-Galiana, I. Ferrante, E. C. Ferreira, F. Ferrini, F. Fidecaro, D. Finstad, I. Fiori, D. Fiorucci, M. Fishbach, R. P. Fisher, M. Fitz-Axen, R. Flaminio, M. Fletcher, H. Fong, J. A. Font, P. W. F. Forsyth, S. S. Forsyth, J.-D. Fournier, S. Frasca, F. Frasconi, Z. Frei, A. Freise, R. Frey, V. Frey, E. M. Fries, P. Fritschel, V. V. Frolov, P. Fulda, M. Fyffe, H. Gabbard, B. U. Gadre, S. M. Gaebel, J. R. Gair, L. Gammaitoni, M. R. Ganija, S. G. Gaonkar, C. Garcia-Quiros, F. Garufi, B. Gateley, S. Gaudio, G. Gaur, V. Gayathri, N. Gehrels, G. Gemme, E. Genin, A. Gennai, D. George, J. George, L. Gergely, V. Germain, S. Ghonge, Abhirup Ghosh, Archisman Ghosh, S. Ghosh, J. A. Giaime, K. D. Giardina, A. Giazotto, K. Gill, L. Glover, E. Goetz, R. Goetz, S. Gomes, B. Goncharov, G. González, J. M. Gonzalez Castro, A. Gopakumar, M. L. Gorodetsky, S. E. Gossan, M. Gosselin, R. Gouaty, A. Grado, C. Graef, M. Granata, A. Grant, S. Gras, C. Gray, G. Greco, A. C. Green, E. M. Gretarsson, B. Griswold, P. Groot, H. Grote, S. Grunewald, P. Gruning, G. M. Guidi, X. Guo, A. Gupta, M. K. Gupta, K. E. Gushwa, E. K. Gustafson, R. Gustafson, O. Halim, B. R. Hall, E. D. Hall, E. Z. Hamilton, G. Hammond, M. Haney, M. M. Hanke, J. Hanks, C. Hanna, M. D. Hannam, O. A. Hannuksela, J. Hanson, T. Hardwick, J. Harms, G. M. Harry, I. W. Harry, M. J. Hart, C.-J. Haster, K. Haughian, J. Healy, A. Heidmann, M. C. Heintze, H. Heitmann, P. Hello, G. Hemming, M. Hendry, I. S. Heng, J. Hennig, A. W. Heptonstall, M. Heurs, S. Hild, T. Hinderer, D. Hoak, D. Hofman, K. Holt, D. E. Holz, P. Hopkins, C. Horst, J. Hough, E. A. Houston, E. J. Howell, A. Hreibi, Y. M. Hu, E. A. Huerta, D. Huet, B. Hughey, S. Husa, S. H. Huttner, T. Huynh-Dinh, N. Indik, R. Inta, G. Intini, H. N. Isa, J.-M. Isac, M. Isi, B. R. Iyer, K. Izumi, T. Jacqmin, K. Jani, P. Jaranowski, S. Jawahar, F. Jiménez-Forteza, W. W. Johnson, D. I. Jones, R. Jones, R. J. G. Jonker, L. Ju, J. Junker, C. V. Kalaghatgi, V. Kalogera, B. Kamai, S. Kandhasamy, G. Kang, J. B. Kanner, S. J. Kapadia, S. Karki, K. S. Karvinen, M. Kasprzack, M. Katolik, E. Katsavounidis, W. Katzman, S. Kaufer, K. Kawabe, F. Kéfélian, D. Keitel, A. J. Kemball, R. Kennedy, C. Kent, J. S. Key, F. Y. Khalili, I. Khan, S. Khan, Z. Khan, E. A. Khazanov, N. Kijbunchoo, Chunglee Kim, J. C. Kim, K. Kim, W. Kim, W. S. Kim, Y.-M. Kim, S. J. Kimbrell, E. J. King, P. J. King, M. Kinley-Hanlon, R. Kirchhoff, J. S. Kissel, L. Kleybolte, S. Klimenko, T. D. Knowles, P. Koch, S. M. Koehlenbeck, S. Koley, V. Kondrashov, A. Kontos, M. Korobko, W. Z. Korth, I. Kowalska, D. B. Kozak, C. Krämer, V. Kringel, B. Krishnan, A. Królak, G. Kuehn, P. Kumar, R. Kumar, S. Kumar, L. Kuo, A. Kutynia, S. Kwang, B. D. Lackey, K. H. Lai, M. Landry, R. N. Lang, J. Lange, B. Lantz, R. K. Lanza, S. L. Larson, A. Lartaux-Vollard, P. D. Lasky, M. Laxen, A. Lazzarini, C. Lazzaro, P. Leaci, S. Leavey, C. H. Lee, H. K. Lee, H. M. Lee, H. W. Lee, K. Lee, J. Lehmann, A. Lenon, M. Leonardi, N. Leroy, N. Letendre, Y. Levin, T. G. F. Li, S. D. Linker, T. B. Littenberg, J. Liu, R. K. L. Lo, N. A. Lockerbie, L. T. London, J. E. Lord, M. Lorenzini, V. Loriette, M. Lormand, G. Losurdo, J. D. Lough, C. O. Lousto, G. Lovelace, H. Lück, D. Lumaca, A. P. Lundgren, R. Lynch, Y. Ma, R. Macas, S. Macfoy, B. Machenschalk, M. MacInnis, D. M. Macleod, I. Magaña Hernandez, F. Magaña-Sandoval, L. Magaña Zertuche, R. M. Magee, E. Majorana, I. Maksimovic, N. Man, V. Mandic, V. Mangano, G. L. Mansell, M. Manske, M. Mantovani, F. Marchesoni, F. Marion, S. Márka, Z. Márka, C. Markakis, A. S. Markosyan, A. Markowitz, E. Maros, A. Marquina, P. Marsh, F. Martelli, L. Martellini, I. W. Martin, R. M. Martin, D. V. Martynov, K. Mason, E. Massera, A. Masserot, T. J. Massinger, M. Masso-Reid, S. Mastrogiovanni, A. Matas, F. Matichard, L. Matone, N. Mavalvala, N. Mazumder, R. McCarthy, D. E. McClelland, S. McCormick, L. McCuller, S. C. McGuire, G. McIntyre, J. McIver, D. J. McManus, L. McNeill, T. McRae, S. T. McWilliams, D. Meacher, G. D. Meadors, M. Mehmet, J. Meidam, E. Mejuto-Villa, A. Melatos, G. Mendell, R. A. Mercer, E. L. Merilh, M. Merzougui, S. Meshkov, C. Messenger, C. Messick, R. Metzdorff, P. M. Meyers, H. Miao, C. Michel, H. Middleton, E. E. Mikhailov, L. Milano, A. L. Miller, B. B. Miller, J. Miller, M. Millhouse, M. C. Milovich-Goff, O. Minazzoli, Y. Minenkov, J. Ming, C. Mishra, S. Mitra, V. P. Mitrofanov, G. Mitselmakher, R. Mittleman, D. Moffa, A. Moggi, K. Mogushi, M. Mohan, S. R. P. Mohapatra, M. Montani, C. J. Moore, D. Moraru, G. Moreno, S. R. Morriss, B. Mours, C. M. Mow-Lowry, G. Mueller, A. W. Muir, Arunava Mukherjee, D. Mukherjee, S. Mukherjee, N. Mukund, A. Mullavey, J. Munch, E. A. Muñiz, M. Muratore, P. G. Murray, K. Napier, I. Nardecchia, L. Naticchioni, R. K. Nayak, J. Neilson, G. Nelemans, T. J. N. Nelson, M. Nery, A. Neunzert, L. Nevin, J. M. Newport, G. Newton, K. K. Y. Ng, P. Nguyen, T. T. Nguyen, D. Nichols, A. B. Nielsen, S. Nissanke, A. Nitz, A. Noack, F. Nocera, D. Nolting, C. North, L. K. Nuttall, J. Oberling, G. D. O’Dea, G. H. Ogin, J. J. Oh, S. H. Oh, F. Ohme, M. A. Okada, M. Oliver, P. Oppermann, Richard J. Oram, B. O’Reilly, R. Ormiston, L. F. Ortega, R. O’Shaughnessy, S. Ossokine, D. J. Ottaway, H. Overmier, B. J. Owen, A. E. Pace, J. Page, M. A. Page, A. Pai, S. A. Pai, J. R. Palamos, O. Palashov, C. Palomba, A. Pal-Singh, Howard Pan, Huang-Wei Pan, B. Pang, P. T. H. Pang, C. Pankow, F. Pannarale, B. C. Pant, F. Paoletti, A. Paoli, M. A. Papa, A. Parida, W. Parker, D. Pascucci, A. Pasqualetti, R. Passaquieti, D. Passuello, M. Patil, B. Patricelli, B. L. Pearlstone, M. Pedraza, R. Pedurand, L. Pekowsky, A. Pele, S. Penn, C. J. Perez, A. Perreca, L. M. Perri, H. P. Pfeiffer, M. Phelps, O. J. Piccinni, M. Pichot, F. Piergiovanni, V. Pierro, G. Pillant, L. Pinard, I. M. Pinto, M. Pirello, M. Pitkin, M. Poe, R. Poggiani, P. Popolizio, E. K. Porter, A. Post, J. Powell, J. Prasad, J. W. W. Pratt, G. Pratten, V. Predoi, T. Prestegard, L. R. Price, M. Prijatelj, M. Principe, S. Privitera, G. A. Prodi, L. G. Prokhorov, O. Puncken, M. Punturo, P. Puppo, M. Pürrer, H. Qi, V. Quetschke, E. A. Quintero, R. Quitzow-James, F. J. Raab, D. S. Rabeling, H. Radkins, P. Raffai, S. Raja, C. Rajan, B. Rajbhandari, M. Rakhmanov, K. E. Ramirez, A. Ramos-Buades, P. Rapagnani, V. Raymond, M. Razzano, J. Read, T. Regimbau, L. Rei, S. Reid, D. H. Reitze, W. Ren, S. D. Reyes, F. Ricci, P. M. Ricker, S. Rieger, K. Riles, M. Rizzo, N. A. Robertson, R. Robie, F. Robinet, A. Rocchi, L. Rolland, J. G. Rollins, V. J. Roma, R. Romano, C. L. Romel, J. H. Romie, D. Rosińska, M. P. Ross, S. Rowan, A. Rüdiger, P. Ruggi, G. Rutins, K. Ryan, S. Sachdev, T. Sadecki, L. Sadeghian, M. Sakellariadou, L. Salconi, M. Saleem, F. Salemi, A. Samajdar, L. Sammut, L. M. Sampson, E. J. Sanchez, L. E. Sanchez, N. Sanchis-Gual, V. Sandberg, J. R. Sanders, B. Sassolas, B. S. Sathyaprakash, P. R. Saulson, O. Sauter, R. L. Savage, A. Sawadsky, P. Schale, M. Scheel, J. Scheuer, J. Schmidt, P. Schmidt, R. Schnabel, R. M. S. Schofield, A. Schönbeck, E. Schreiber, D. Schuette, B. W. Schulte, B. F. Schutz, S. G. Schwalbe, J. Scott, S. M. Scott, E. Seidel, D. Sellers, A. S. Sengupta, D. Sentenac, V. Sequino, A. Sergeev, D. A. Shaddock, T. J. Shaffer, A. A. Shah, M. S. Shahriar, M. B. Shaner, L. Shao, B. Shapiro, P. Shawhan, A. Sheperd, D. H. Shoemaker, D. M. Shoemaker, K. Siellez, X. Siemens, M. Sieniawska, D. Sigg, A. D. Silva, L. P. Singer, A. Singh, A. Singhal, A. M. Sintes, B. J. J. Slagmolen, B. Smith, J. R. Smith, R. J. E. Smith, S. Somala, E. J. Son, J. A. Sonnenberg, B. Sorazu, F. Sorrentino, T. Souradeep, A. P. Spencer, A. K. Srivastava, K. Staats, A. Staley, M. Steinke, J. Steinlechner, S. Steinlechner, D. Steinmeyer, S. P. Stevenson, R. Stone, D. J. Stops, K. A. Strain, G. Stratta, S. E. Strigin, A. Strunk, R. Sturani, A. L. Stuver, T. Z. Summerscales, L. Sun, S. Sunil, J. Suresh, P. J. Sutton, B. L. Swinkels, M. J. Szczepańczyk, M. Tacca, S. C. Tait, C. Talbot, D. Talukder, D. B. Tanner, M. Tápai, A. Taracchini, J. D. Tasson, J. A. Taylor, R. Taylor, S. V. Tewari, T. Theeg, F. Thies, E. G. Thomas, M. Thomas, P. Thomas, K. A. Thorne, K. S. Thorne, E. Thrane, S. Tiwari, V. Tiwari, K. V. Tokmakov, K. Toland, M. Tonelli, Z. Tornasi, A. Torres-Forné, C. I. Torrie, D. Töyrä, F. Travasso, G. Traylor, J. Trinastic, M. C. Tringali, L. Trozzo, K. W. Tsang, M. Tse, R. Tso, L. Tsukada, D. Tsuna, D. Tuyenbayev, K. Ueno, D. Ugolini, C. S. Unnikrishnan, A. L. Urban, S. A. Usman, H. Vahlbruch, G. Vajente, G. Valdes, N. van Bakel, M. van Beuzekom, J. F. J. van den Brand, C. Van Den Broeck, D. C. Vander-Hyde, L. van der Schaaf, J. V. van Heijningen, A. A. van Veggel, M. Vardaro, V. Varma, S. Vass, M. Vasúth, A. Vecchio, G. Vedovato, J. Veitch, P. J. Veitch, K. Venkateswara, G. Venugopalan, D. Verkindt, F. Vetrano, A. Viceré, A. D. Viets, S. Vinciguerra, D. J. Vine, J.-Y. Vinet, S. Vitale, T. Vo, H. Vocca, C. Vorvick, S. P. Vyatchanin, A. R. Wade, L. E. Wade, M. Wade, R. Walet, M. Walker, L. Wallace, S. Walsh, G. Wang, H. Wang, J. Z. Wang, W. H. Wang, Y. F. Wang, R. L. Ward, J. Warner, M. Was, J. Watchi, B. Weaver, L.-W. Wei, M. Weinert, A. J. Weinstein, R. Weiss, L. Wen, E. K. Wessel, P. Wessels, J. Westerweck, T. Westphal, K. Wette, J. T. Whelan, S. E. Whitcomb, B. F. Whiting, C. Whittle, D. Wilken, D. Williams, R. D. Williams, A. R. Williamson, J. L. Willis, B. Willke, M. H. Wimmer, W. Winkler, C. C. Wipf, H. Wittel, G. Woan, J. Woehler, J. Wofford, K. W. K. Wong, J. Worden, J. L. Wright, D. S. Wu, D. M. Wysocki, S. Xiao, H. Yamamoto, C. C. Yancey, L. Yang, M. J. Yap, M. Yazback, Hang Yu, Haocun Yu, M. Yvert, A. Zadrożny, M. Zanolin, T. Zelenova, J.-P. Zendri, M. Zevin, L. Zhang, M. Zhang, T. Zhang, Y.-H. Zhang, C. Zhao, M. Zhou, Z. Zhou, S. J. Zhu, X. J. Zhu, A. B. Zimmerman, M. E. Zucker, J. Zweizig, C. A. Wilson-Hodge, E. Bissaldi, L. Blackburn, M. S. Briggs, E. Burns, W. H. Cleveland, V. Connaughton, M. H. Gibby, M. M Giles, A. Goldstein, R. Hamburg, P. Jenke, C. M. Hui, R. M. Kippen, D. Kocevski, S. McBreen, C. A. Meegan, W. S. Paciesas, S. Poolakkil, R. D. Preece, J. Racusin, O. J. Roberts, M. Stanbro, P. Veres, A. von Kienlin, V. Savchenko, C. Ferrigno, E. Kuulkers, A. Bazzano, E. Bozzo, S. Brandt, J. Chenevez, T. J.-L. Courvoisier, R. Diehl, A. Domingo, L. Hanlon, E. Jourdain, P. Laurent, F. Lebrun, A. Lutovinov, A. Martin-Carrillo, S. Mereghetti, L. Natalucci, J. Rodi, J.-P. Roques, R. Sunyaev, P. Ubertini, M. G. Aartsen, M. Ackermann, J. Adams, J. A. Aguilar, M. Ahlers, M. Ahrens, I. Al Samarai, D. Altmann, K. Andeen, T. Anderson, I. Ansseau, G. Anton, C. Argüelles, J. Auffenberg, S. Axani, H. Bagherpour, X. Bai, J. P. Barron, S. W. Barwick, V. Baum, R. Bay, J. J. Beatty, J. Becker Tjus, E. Bernardini, D. Z. Besson, G. Binder, D. Bindig, E. Blaufuss, S. Blot, C. Bohm, M. Börner, F. Bos, D. Bose, S. Böser, O. Botner, E. Bourbeau, J. Bourbeau, F. Bradascio, J. Braun, L. Brayeur, M. Brenzke, H.-P. Bretz, S. Bron, J. Brostean-Kaiser, A. Burgman, T. Carver, J. Casey, M. Casier, E. Cheung, D. Chirkin, A. Christov, K. Clark, L. Classen, S. Coenders, G. H. Collin, J. M. Conrad, D. F. Cowen, R. Cross, M. Day, J. P. A. M. de André, C. De Clercq, J. J. DeLaunay, H. Dembinski, S. De Ridder, P. Desiati, K. D. de Vries, G. de Wasseige, M. de With, T. DeYoung, J. C. Díaz-Vélez, V. di Lorenzo, H. Dujmovic, J. P. Dumm, M. Dunkman, E. Dvorak, B. Eberhardt, T. Ehrhardt, B. Eichmann, P. Eller, P. A. Evenson, S. Fahey, A. R. Fazely, J. Felde, K. Filimonov, C. Finley, S. Flis, A. Franckowiak, E. Friedman, T. Fuchs, T. K. Gaisser, J. Gallagher, L. Gerhardt, K. Ghorbani, W. Giang, T. Glauch, T. Glüsenkamp, A. Goldschmidt, J. G. Gonzalez, D. Grant, Z. Griffith, C. Haack, A. Hallgren, F. Halzen, K. Hanson, D. Hebecker, D. Heereman, K. Helbing, R. Hellauer, S. Hickford, J. Hignight, G. C. Hill, K. D. Hoffman, R. Hoffmann, B. Hokanson-Fasig, K. Hoshina, F. Huang, M. Huber, K. Hultqvist, M. Hünnefeld, S. In, A. Ishihara, E. Jacobi, G. S. Japaridze, M. Jeong, K. Jero, B. J. P. Jones, P. Kalaczynski, W. Kang, A. Kappes, T. Karg, A. Karle, M. Kauer, A. Keivani, J. L. Kelley, A. Kheirandish, J. Kim, M. Kim, T. Kintscher, J. Kiryluk, T. Kittler, S. R. Klein, G. Kohnen, R. Koirala, H. Kolanoski, L. Köpke, C. Kopper, S. Kopper, J. P. Koschinsky, D. J. Koskinen, M. Kowalski, K. Krings, M. Kroll, G. Krückl, J. Kunnen, S. Kunwar, N. Kurahashi, T. Kuwabara, A. Kyriacou, M. Labare, J. L. Lanfranchi, M. J. Larson, F. Lauber, M. Lesiak-Bzdak, M. Leuermann, Q. R. Liu, L. Lu, J. Lünemann, W. Luszczak, J. Madsen, G. Maggi, K. B. M. Mahn, S. Mancina, R. Maruyama, K. Mase, R. Maunu, F. McNally, K. Meagher, M. Medici, M. Meier, T. Menne, G. Merino, T. Meures, S. Miarecki, J. Micallef, G. Momenté, T. Montaruli, R. W. Moore, M. Moulai, R. Nahnhauer, P. Nakarmi, U. Naumann, G. Neer, H. Niederhausen, S. C. Nowicki, D. R. Nygren, A. Obertacke Pollmann, A. Olivas, A. O’Murchadha, T. Palczewski, H. Pandya, D. V. Pankova, P. Peiffer, J. A. Pepper, C. Pérez de los Heros, D. Pieloth, E. Pinat, P. B. Price, G. T. Przybylski, C. Raab, L. Rädel, M. Rameez, K. Rawlins, I. C. Rea, R. Reimann, B. Relethford, M. Relich, E. Resconi, W. Rhode, M. Richman, S. Robertson, M. Rongen, C. Rott, T. Ruhe, D. Ryckbosch, D. Rysewyk, T. Sälzer, S. E. Sanchez Herrera, A. Sandrock, J. Sandroos, M. Santander, S. Sarkar, S. Sarkar, K. Satalecka, P. Schlunder, T. Schmidt, A. Schneider, S. Schoenen, S. Schöneberg, L. Schumacher, D. Seckel, S. Seunarine, J. Soedingrekso, D. Soldin, M. Song, G. M. Spiczak, C. Spiering, J. Stachurska, M. Stamatikos, T. Stanev, A. Stasik, J. Stettner, A. Steuer, T. Stezelberger, R. G. Stokstad, A. Stössl, N. L. Strotjohann, T. Stuttard, G. W. Sullivan, M. Sutherland, I. Taboada, J. Tatar, F. Tenholt, S. Ter-Antonyan, A. Terliuk, G. Tešić, S. Tilav, P. A. Toale, M. N. Tobin, S. Toscano, D. Tosi, M. Tselengidou, C. F. Tung, A. Turcati, C. F. Turley, B. Ty, E. Unger, M. Usner, J. Vandenbroucke, W. Van Driessche, N. van Eijndhoven, S. Vanheule, J. van Santen, M. Vehring, E. Vogel, M. Vraeghe, C. Walck, A. Wallace, M. Wallraff, F. D. Wandler, N. Wandkowsky, A. Waza, C. Weaver, M. J. Weiss, C. Wendt, J. Werthebach, B. J. Whelan, K. Wiebe, C. H. Wiebusch, L. Wille, D. R. Williams, L. Wills, M. Wolf, T. R. Wood, E. Woolsey, K. Woschnagg, D. L. Xu, X. W. Xu, Y. Xu, J. P. Yanez, G. Yodh, S. Yoshida, T. Yuan, M. Zoll, A. Balasubramanian, S. Mate, V. Bhalerao, D. Bhattacharya, A. Vibhute, G. C. Dewangan, A. R. Rao, S. V. Vadawale, D. S. Svinkin, K. Hurley, R. L. Aptekar, D. D. Frederiks, S. V. Golenetskii, A. V. Kozlova, A. L. Lysenko, Ph. P. Oleynik, A. E. Tsvetkova, M. V. Ulanov, T. Cline, T. P. Li, S. L. Xiong, S. N. Zhang, F. J. Lu, L. M. Song, X. L. Cao, Z. Chang, G. Chen, L. Chen, T. X. Chen, Y. Chen, Y. B. Chen, Y. P. Chen, W. Cui, W. W. Cui, J. K. Deng, Y. W. Dong, Y. Y. Du, M. X. Fu, G. H. Gao, H. Gao, M. Gao, M. Y. Ge, Y. D. Gu, J. Guan, C. C. Guo, D. W. Han, W. Hu, Y. Huang, J. Huo, S. M. Jia, L. H. Jiang, W. C. Jiang, J. Jin, Y. J. Jin, B. Li, C. K. Li, G. Li, M. S. Li, W. Li, X. Li, X. B. Li, X. F. Li, Y. G. Li, Z. J. Li, Z. W. Li, X. H. Liang, J. Y. Liao, C. Z. Liu, G. Q. Liu, H. W. Liu, S. Z. Liu, X. J. Liu, Y. Liu, Y. N. Liu, B. Lu, X. F. Lu, T. Luo, X. Ma, B. Meng, Y. Nang, J. Y. Nie, G. Ou, J. L. Qu, N. Sai, L. Sun, Y. Tan, L. Tao, W. H. Tao, Y. L. Tuo, G. F. Wang, H. Y. Wang, J. Wang, W. S. Wang, Y. S. Wang, X. Y. Wen, B. B. Wu, M. Wu, G. C. Xiao, H. Xu, Y. P. Xu, L. L. Yan, J. W. Yang, S. Yang, Y. J. Yang, A. M. Zhang, C. L. Zhang, C. M. Zhang, F. Zhang, H. M. Zhang, J. Zhang, Q. Zhang, S. Zhang, T. Zhang, W. Zhang, W. C. Zhang, W. Z. Zhang, Y. Zhang, Y. Zhang, Y. F. Zhang, Y. J. Zhang, Z. Zhang, Z. L. Zhang, H. S. Zhao, J. L. Zhao, X. F. Zhao, S. J. Zheng, Y. Zhu, Y. X. Zhu, C. L. Zou, A. Albert, M. André, M. Anghinolfi, M. Ardid, J.-J. Aubert, J. Aublin, T. Avgitas, B. Baret, J. Barrios-Martí, S. Basa, B. Belhorma, V. Bertin, S. Biagi, R. Bormuth, S. Bourret, M. C. Bouwhuis, H. Brânzaş, R. Bruijn, J. Brunner, J. Busto, A. Capone, L. Caramete, J. Carr, S. Celli, R. Cherkaoui El Moursli, T. Chiarusi, M. Circella, J. A. B. Coelho, A. Coleiro, R. Coniglione, H. Costantini, P. Coyle, A. Creusot, A. F. Díaz, A. Deschamps, G. De Bonis, C. Distefano, I. Di Palma, A. Domi, C. Donzaud, D. Dornic, D. Drouhin, T. Eberl, I. El Bojaddaini, N. El Khayati, D. Elsässer, A. Enzenhöfer, A. Ettahiri, F. Fassi, I. Felis, L. A. Fusco, P. Gay, V. Giordano, H. Glotin, T. Grégoire, R. Gracia Ruiz, K. Graf, S. Hallmann, H. van Haren, A. J. Heijboer, Y. Hello, J. J. Hernández-Rey, J. Hössl, J. Hofestädt, C. Hugon, G. Illuminati, C. W. James, M. de Jong, M. Jongen, M. Kadler, O. Kalekin, U. Katz, D. Kiessling, A. Kouchner, M. Kreter, I. Kreykenbohm, V. Kulikovskiy, C. Lachaud, R. Lahmann, D. Lefèvre, E. Leonora, M. Lotze, S. Loucatos, M. Marcelin, A. Margiotta, A. Marinelli, J. A. Martínez-Mora, R. Mele, K. Melis, T. Michael, P. Migliozzi, A. Moussa, S. Navas, E. Nezri, M. Organokov, G. E. Păvălaş, C. Pellegrino, C. Perrina, P. Piattelli, V. Popa, T. Pradier, L. Quinn, C. Racca, G. Riccobene, A. Sánchez-Losa, M. Saldaña, I. Salvadori, D. F. E. Samtleben, M. Sanguineti, P. Sapienza, C. Sieger, M. Spurio, Th. Stolarczyk, M. Taiuti, Y. Tayalati, A. Trovato, D. Turpin, C. Tönnis, B. Vallage, V. Van Elewyck, F. Versari, D. Vivolo, A. Vizzoca, J. Wilms, J. D. Zornoza, J. Zúñiga, A. P. Beardmore, A. A. Breeveld, D. N. Burrows, S. B. Cenko, G. Cusumano, A. D’Aì, M. de Pasquale, S. W. K. Emery, P. A. Evans, P. Giommi, C. Gronwall, J. A. Kennea, H. A. Krimm, N. P. M. Kuin, A. Lien, F. E. Marshall, A. Melandri, J. A. Nousek, S. R. Oates, J. P. Osborne, C. Pagani, K. L. Page, D. M. Palmer, M. Perri, M. H. Siegel, B. Sbarufatti, G. Tagliaferri, A. Tohuvavohu, M. Tavani, F. Verrecchia, A. Bulgarelli, Y. Evangelista, L. Pacciani, M. Feroci, C. Pittori, A. Giuliani, E. Del Monte, I. Donnarumma, A. Argan, A. Trois, A. Ursi, M. Cardillo, G. Piano, F. Longo, F. Lucarelli, P. Munar-Adrover, F. Fuschino, C. Labanti, M. Marisaldi, G. Minervini, V. Fioretti, N. Parmiggiani, F. Gianotti, M. Trifoglio, G. Di Persio, L. A. Antonelli, G. Barbiellini, P. Caraveo, P. W. Cattaneo, E. Costa, S. Colafrancesco, F. D’Amico, A. Ferrari, A. Morselli, F. Paoletti, P. Picozza, M. Pilia, A. Rappoldi, P. Soffitta, S. Vercellone, R. J. Foley, D. A. Coulter, C. D. Kilpatrick, M. R. Drout, A. L. Piro, B. J. Shappee, M. R. Siebert, J. D. Simon, N. Ulloa, D. Kasen, B. F. Madore, A. Murguia-Berthier, Y.-C. Pan, J. X. Prochaska, E. Ramirez-Ruiz, A. Rest, C. Rojas-Bravo, E. Berger, M. Soares-Santos, J. Annis, K. D. Alexander, S. Allam, E. Balbinot, P. Blanchard, D. Brout, R. E. Butler, R. Chornock, E. R. Cook, P. Cowperthwaite, H. T. Diehl, A. Drlica-Wagner, M. R. Drout, F. Durret, T. Eftekhari, D. A. Finley, W. Fong, J. A. Frieman, C. L. Fryer, J. García-Bellido, R. A. Gruendl, W. Hartley, K. Herner, R. Kessler, H. Lin, P. A. A. Lopes, A. C. C. Lourenço, R. Margutti, J. L. Marshall, T. Matheson, G. E. Medina, B. D. Metzger, R. R. Muñoz, J. Muir, M. Nicholl, P. Nugent, A. Palmese, F. Paz-Chinchón, E. Quataert, M. Sako, M. Sauseda, D. J. Schlegel, D. Scolnic, L. F. Secco, N. Smith, F. Sobreira, V. A. Villar, A. K. Vivas, W. Wester, P. K. G. Williams, B. Yanny, A. Zenteno, Y. Zhang, T. M. C. Abbott, M. Banerji, K. Bechtol, A. Benoit-Lévy, E. Bertin, D. Brooks, E. Buckley-Geer, D. L. Burke, D. Capozzi, A. Carnero Rosell, M. Carrasco Kind, F. J. Castander, M. Crocce, C. E. Cunha, C. B. D’Andrea, L. N. da Costa, C. Davis, D. L. DePoy, S. Desai, J. P. Dietrich, T. F. Eifler, E. Fernandez, B. Flaugher, P. Fosalba, E. Gaztanaga, D. W. Gerdes, T. Giannantonio, D. A. Goldstein, D. Gruen, J. Gschwend, G. Gutierrez, K. Honscheid, D. J. James, T. Jeltema, M. W. G. Johnson, M. D. Johnson, S. Kent, E. Krause, R. Kron, K. Kuehn, O. Lahav, M. Lima, M. A. G. Maia, M. March, P. Martini, R. G. McMahon, F. Menanteau, C. J. Miller, R. Miquel, J. J. Mohr, R. C. Nichol, R. L. C. Ogando, A. A. Plazas, A. K. Romer, A. Roodman, E. S. Rykoff, E. Sanchez, V. Scarpine, R. Schindler, M. Schubnell, I. Sevilla-Noarbe, E. Sheldon, M. Smith, R. C. Smith, A. Stebbins, E. Suchyta, M. E. C. Swanson, G. Tarle, R. C. Thomas, M. A. Troxel, D. L. Tucker, V. Vikram, A. R. Walker, R. H. Wechsler, J. Weller, J. L. Carlin, M. S. S. Gill, T. S. Li, J. Marriner, E. Neilsen, J. B. Haislip, V. V. Kouprianov, D. E. Reichart, D. J. Sand, L. Tartaglia, S. Valenti, S. Yang, S. Benetti, E. Brocato, S. Campana, E. Cappellaro, S. Covino, P. D’Avanzo, V. D’Elia, F. Getman, G. Ghirlanda, G. Ghisellini, L. Limatola, L. Nicastro, E. Palazzi, E. Pian, S. Piranomonte, A. Possenti, A. Rossi, O. S. Salafia, L. Tomasella, L. Amati, L. A. Antonelli, M. G. Bernardini, F. Bufano, M. Capaccioli, P. Casella, M. Dadina, G. De Cesare, A. Di Paola, G. Giuffrida, A. Giunta, G. L. Israel, M. Lisi, E. Maiorano, M. Mapelli, N. Masetti, A. Pescalli, L. Pulone, R. Salvaterra, P. Schipani, M. Spera, A. Stamerra, L. Stella, V. Testa, M. Turatto, D. Vergani, G. Aresu, M. Bachetti, F. Buffa, M. Burgay, M. Buttu, T. Caria, E. Carretti, V. Casasola, P. Castangia, G. Carboni, S. Casu, R. Concu, A. Corongiu, G. L. Deiana, E. Egron, A. Fara, F. Gaudiomonte, V. Gusai, A. Ladu, S. Loru, S. Leurini, L. Marongiu, A. Melis, G. Melis, Carlo Migoni, Sabrina Milia, Alessandro Navarrini, A. Orlati, P. Ortu, S. Palmas, A. Pellizzoni, D. Perrodin, T. Pisanu, S. Poppi, S. Righini, A. Saba, G. Serra, M. Serrau, M. Stagni, G. Surcis, V. Vacca, G. P. Vargiu, L. K. Hunt, Z. P. Jin, S. Klose, C. Kouveliotou, P. A. Mazzali, P. Møller, L. Nava, T. Piran, J. Selsing, S. D. Vergani, K. Wiersema, K. Toma, A. B. Higgins, C. G. Mundell, S. di Serego Alighieri, D. Gótz, W. Gao, A. Gomboc, L. Kaper, S. Kobayashi, D. Kopac, J. Mao, R. L. C. Starling, I. Steele, A. J. van der Horst, F. Acero, W. B. Atwood, L. Baldini, G. Barbiellini, D. Bastieri, B. Berenji, R. Bellazzini, E. Bissaldi, R. D. Blandford, E. D. Bloom, R. Bonino, E. Bottacini, J. Bregeon, R. Buehler, S. Buson, R. A. Cameron, R. Caputo, P. A. Caraveo, E. Cavazzuti, A. Chekhtman, C. C. Cheung, J. Chiang, S. Ciprini, J. Cohen-Tanugi, L. R. Cominsky, D. Costantin, A. Cuoco, F. D'Ammando, F. de Palma, S. W. Digel, N. Di Lalla, M. Di Mauro, L. Di Venere, R. Dubois, S. J. Fegan, W. B. Focke, A. Franckowiak, Y. Fukazawa, S. Funk, P. Fusco, F. Gargano, D. Gasparrini, N. Giglietto, F. Giordano, M. Giroletti, T. Glanzman, D. Green, M.-H. Grondin, L. Guillemot, S. Guiriec, A. K. Harding, D. Horan, G. Jóhannesson, T. Kamae, S. Kensei, M. Kuss, G. La Mura, L. Latronico, M. Lemoine-Goumard, F. Longo, F. Loparco, M. N. Lovellette, P. Lubrano, J. D. Magill, S. Maldera, A. Manfreda, M. N. Mazziotta, J. E. McEnery, M. Meyer, P. F. Michelson, N. Mirabal, M. E. Monzani, E. Moretti, A. Morselli, I. V. Moskalenko, M. Negro, E. Nuss, R. Ojha, N. Omodei, M. Orienti, E. Orlando, M. Palatiello, V. S. Paliya, D. Paneque, M. Pesce-Rollins, F. Piron, T. A. Porter, G. Principe, S. Rainò, R. Rando, M. Razzano, S. Razzaque, A. Reimer, O. Reimer, T. Reposeur, L. S. Rochester, P. M. Saz Parkinson, C. Sgrò, E. J. Siskind, F. Spada, G. Spandre, D. J. Suson, M. Takahashi, Y. Tanaka, J. G. Thayer, J. B. Thayer, D. J. Thompson, L. Tibaldo, D. F. Torres, E. Torresi, E. Troja, T. M. Venters, G. Vianello, G. Zaharijas, J. R. Allison, K. W. Bannister, D. Dobie, D. L. Kaplan, E. Lenc, C. Lynch, T. Murphy, E. M. Sadler, A. Hotan, C. W. James, S. Oslowski, W. Raja, R. M. Shannon, M. Whiting, I. Arcavi, D. A. Howell, C. McCully, G. Hosseinzadeh, D. Hiramatsu, D. Poznanski, J. Barnes, M. Zaltzman, S. Vasylyev, D. Maoz, J. Cooke, M. Bailes, C. Wolf, A. T. Deller, C. Lidman, L. Wang, B. Gendre, I. Andreoni, K. Ackley, T. A. Pritchard, M. S. Bessell, S.-W. Chang, A. Möller, C. A. Onken, R. A. Scalzo, R. Ridden-Harper, R. G. Sharp, B. E. Tucker, T. J. Farrell, E. Elmer, S. Johnston, V. Venkatraman Krishnan, E. F. Keane, J. A. Green, A. Jameson, L. Hu, B. Ma, T. Sun, X. Wu, X. Wang, Z. Shang, Y. Hu, M. C. B. Ashley, X. Yuan, X. Li, C. Tao, Z. Zhu, H. Zhang, N. B. Suntzeff, J. Zhou, J. Yang, B. Orange, D. Morris, A. Cucchiara, T. Giblin, A. Klotz, J. Staff, P. Thierry, B. P. Schmidt, N. R. Tanvir, A. J. Levan, Z. Cano, A. de Ugarte-Postigo, C. González-Fernández, J. Greiner, J. Hjorth, M. Irwin, T. Krühler, I. Mandel, B. Milvang-Jensen, P. O'Brien, E. Rol, S. Rosetti, S. Rosswog, A. Rowlinson, D. T. H. Steeghs, C. C. Thöne, K. Ulaczyk, D. Watson, S. H. Bruun, R. Cutter, R. Figuera Jaimes, Y. I. Fujii, A. S. Fruchter, B. Gompertz, P. Jakobsson, G. Hodosan, U. G. Jèrgensen, T. Kangas, D. A. Kann, M. Rabus, S. L. Schrøder, E. R. Stanway, R. A. M. J. Wijers, V. M. Lipunov, E. S. Gorbovskoy, V. G. Kornilov, N. V. Tyurina, P. V. Balanutsa, A. S. Kuznetsov, D. M. Vlasenko, R. C. Podesta, C. Lopez, F. Podesta, H. O. Levato, C. Saffe, C. C. Mallamaci, N. M. Budnev, O. A. Gress, D. A. Kuvshinov, I. A. Gorbunov, V. V. Vladimirov, D. S. Zimnukhov, A. V. Gabovich, V. V. Yurkov, Yu. P. Sergienko, R. Rebolo, M. Serra-Ricart, A. G. Tlatov, Yu. V. Ishmuhametova, F. Abe, K. Aoki, W. Aoki, Y. Asakura, S. Baar, S. Barway, I. A. Bond, M. Doi, F. Finet, T. Fujiyoshi, H. Furusawa, S. Honda, R. Itoh, N. Kanda, K. S. Kawabata, M. Kawabata, J. H. Kim, S. Koshida, D. Kuroda, C.-H. Lee, W. Liu, K. Matsubayashi, S. Miyazaki, K. Morihana, T. Morokuma, K. Motohara, K. L. Murata, H. Nagai, H. Nagashima, T. Nagayama, T. Nakaoka, F. Nakata, R. Ohsawa, T. Ohshima, K. Ohta, H. Okita, T. Saito, Y. Saito, S. Sako, Y. Sekiguchi, T. Sumi, A. Tajitsu, J. Takahashi, M. Takayama, Y. Tamura, I. Tanaka, M. Tanaka, T. Terai, N. Tominaga, P. J. Tristram, M. Uemura, Y. Utsumi, M. S. Yamaguchi, N. Yasuda, M. Yoshida, T. Zenko, S. M. Adams, G. C. Anupama, J. Bally, S. Barway, E. Bellm, N. Blagorodnova, C. Cannella, P. Chandra, D. Chatterjee, T. E. Clarke, B. E. Cobb, D. O. Cook, C. Copperwheat, K. De, S. W. K. Emery, U. Feindt, K. Foster, O. D. Fox, D. A. Frail, C. Fremling, C. Frohmaier, J. A. Garcia, S. Ghosh, S. Giacintucci, A. Goobar, O. Gottlieb, B. W. Grefenstette, G. Hallinan, F. Harrison, M. Heida, G. Helou, A. Y. Q. Ho, A. Horesh, K. Hotokezaka, W.-H. Ip, R. Itoh, Bob Jacobs, J. E. Jencson, D. Kasen, M. M. Kasliwal, N. E. Kassim, H. Kim, B. S. Kiran, N. P. M. Kuin, S. R. Kulkarni, T. Kupfer, R. M. Lau, K. Madsen, P. A. Mazzali, A. A. Miller, H Miyasaka, K. Mooley, S. T. Myers, E. Nakar, C.-C. Ngeow, P. Nugent, E. O. Ofek, N. Palliyaguru, M. Pavana, D. A. Perley, W. M. Peters, S. Pike, T. Piran, H. Qi, R. M. Quimby, J. Rana, S. Rosswog, F. Rusu, E. M. Sadler, A. Van Sistine, J. Sollerman, Y. Xu, L. Yan, Y. Yatsu, P.-C. Yu, C. Zhang, W. Zhao, K. C. Chambers, M. E. Huber, A. S. B. Schultz, J. Bulger, H. Flewelling, E. A. Magnier, T. B. Lowe, R. J. Wainscoat, C. Waters, M. Willman, K. Ebisawa, C. Hanyu, S. Harita, T. Hashimoto, K. Hidaka, T. Hori, M. Ishikawa, N. Isobe, W. Iwakiri, H. Kawai, N. Kawai, T. Kawamuro, T. Kawase, Y. Kitaoka, K. Makishima, M. Matsuoka, T. Mihara, T. Morita, K. Morita, S. Nakahira, M. Nakajima, Y. Nakamura, H. Negoro, S. Oda, A. Sakamaki, R. Sasaki, M. Serino, M. Shidatsu, R. Shimomukai, Y. Sugawara, S. Sugita, M. Sugizaki, Y. Tachibana, Y. Takao, A. Tanimoto, H. Tomida, Y. Tsuboi, H. Tsunemi, Y. Ueda, S. Ueno, S. Yamada, K. Yamaoka, M. Yamauchi, F. Yatabe, T. Yoneyama, T. Yoshii, D. M. Coward, H. Crisp, D. Macpherson, I. Andreoni, R. Laugier, K. Noysena, A. Klotz, B. Gendre, P. Thierry, D. Turpin, M. Im, C. Choi, J. Kim, Y. Yoon, G. Lim, S.-K. Lee, C.-U. Lee, S.-L. Kim, S.-W. Ko, J. Joe, M.-K. Kwon, P.-J. Kim, S.-K. Lim, J.-S. Choi, J. P. U. Fynbo, D. Malesani, D. Xu, S. J. Smartt, A. Jerkstrand, E. Kankare, S. A. Sim, M. Fraser, C. Inserra, K. Maguire, G. Leloudas, M. Magee, L. J. Shingles, K. W. Smith, D. R. Young, R. Kotak, A. Gal-Yam, J. D. Lyman, D. S. Homan, C. Agliozzo, J. P. Anderson, C. R. Angus, C. Ashall, C. Barbarino, F. E. Bauer, M. Berton, M. T. Botticella, M. Bulla, G. Cannizzaro, R. Cartier, A. Cikota, P. Clark, A. De Cia, M. Della Valle, M. Dennefeld, L. Dessart, G. Dimitriadis, N. Elias-Rosa, R. E. Firth, A. Flörs, C. Frohmaier, L. Galbany, S. González-Gaitán, M. Gromadzki, C. P. Gutiérrez, A. Hamanowicz, J. Harmanen, K. E. Heintz, M.-S. Hernandez, S. T. Hodgkin, I. M. Hook, L. Izzo, P. A. James, P. G. Jonker, W. E. Kerzendorf, Z. Kostrzewa-Rutkowska, M. Kromer, H. Kuncarayakti, A. Lawrence, I. Manulis, S. Mattila, O. McBrien, A. Müller, J. Nordin, D. O'Neill, F. Onori, J. T. Palmerio, A. Pastorello, F. Patat, G. Pignata, P. Podsiadlowski, A. Razza, T. Reynolds, R. Roy, A. J. Ruiter, K. A. Rybicki, L. Salmon, M. L. Pumo, S. J. Prentice, I. R. Seitenzahl, M. Smith, J. Sollerman, M. Sullivan, H. Szegedi, F. Taddia, S. Taubenberger, G. Terreran, B. Van Soelen, J. Vos, N. A. Walton, D. E. Wright, Ł. Wyrzykowski, O. Yaron, T.-W. Chen, T. Krühler, P. Schady, P. Wiseman, J. Greiner, A. Rau, T. Schweyer, S. Klose, A. Nicuesa Guelbenzu, N. T. Palliyaguru, M. M. Shara, T. Williams, P. Vaisanen, S. B. Potter, E. Romero Colmenero, S. Crawford, D. A. H. Buckley, J. Mao, M. C. Díaz, L. M. Macri, D. García Lambas, C. Mendes de Oliveira, J. L. Nilo Castellón, T. Ribeiro, B. Sánchez, W. Schoenell, L. R. Abramo, S. Akras, J. S. Alcaniz, R. Artola, M. Beroiz, S. Bonoli, J. Cabral, R. Camuccio, V. Chavushyan, P. Coelho, C. Colazo, M. V. Costa-Duarte, H. Cuevas Larenas, M. Domínguez Romero, D. Dultzin, D. Fernández, J. García, C. Girardini, D. R. Gonçalves, T. S. Gonçalves, S. Gurovich, Y. Jiménez-Teja, A. Kanaan, M. Lares, R. Lopes de Oliveira, O. López-Cruz, R. Melia, A. Molino, N. Padilla, T. Peñuela, V. M. Placco, C. Quiñones, A. Ramírez Rivera, V. Renzi, L. Riguccini, E. Ríos-López, H. Rodriguez, L. Sampedro, M. Schneiter, L. Sodré, M. Starck, S. Torres-Flores, M. Tornatore, A. Zadrożny, M. Castillo, A. J. Castro-Tirado, J. C. Tello, Y.-D. Hu, B.-B. Zhang, R. Cunniffe, A. Castellón, D. Hiriart, M. D. Caballero-García, M. Jelínek, P. Kubánek, C. Pérez del Pulgar, I. H. Park, S. Jeong, J. M. Castro Cerón, S. B. Pandey, P. C. Yock, R. Querel, Y. Fan, C. Wang, A Beardsley, I. S. Brown, B. Crosse, D. Emrich, T. Franzen, B. M. Gaensler, L. Horsley, M. Johnston-Hollitt, D. Kenney, M. F. Morales, D. Pallot, M. Sokolowski, K. Steele, S. J. Tingay, C. M. Trott, M. Walker, R. Wayth, A. Williams, C. Wu, A. Yoshida, T. Sakamoto, Y. Kawakubo, K. Yamaoka, I. Takahashi, Y. Asaoka, S. Ozawa, S. Torii, Y. Shimizu, T. Tamura, W. Ishizaki, M. L. Cherry, S. Ricciarini, A. V. Penacchioni, P. S. Marrocchesi, A. S. Pozanenko, A. A. Volnova, E. D. Mazaeva, P. Yu. Minaev, M. A. Krugov, A. V. Kusakin, I. V. Reva, A. S. Moskvitin, V. V. Rumyantsev, R. Inasaridze, E. V. Klunko, N. Tungalag, S. E. Schmalz, O. Burhonov, H. Abdalla, A. Abramowski, F. Aharonian, F. Ait Benkhali, E. O. Angüner, M. Arakawa, M. Arrieta, P. Aubert, M. Backes, A. Balzer, M. Barnard, Y. Becherini, J. Becker Tjus, D. Berge, S. Bernhard, K. Bernlöhr, R. Blackwell, M. Böttcher, C. Boisson, J. Bolmont, S. Bonnefoy, P. Bordas, J. Bregeon, F. Brun, P. Brun, M. Bryan, M. Büchele, T. Bulik, M. Capasso, S. Caroff, A. Carosi, S. Casanova, M. Cerruti, N. Chakraborty, R. C. G. Chaves, A. Chen, J. Chevalier, S. Colafrancesco, B. Condon, J. Conrad, I. D. Davids, J. Decock, C. Deil, J. Devin, P. deWilt, L. Dirson, A. Djannati-Ataï, A. Donath, L. O'C. Drury, K. Dutson, J. Dyks, T. Edwards, K. Egberts, G. Emery, J.-P. Ernenwein, S. Eschbach, C. Farnier, S. Fegan, M. V. Fernandes, A. Fiasson, G. Fontaine, S. Funk, M. Füssling, S. Gabici, Y. A. Gallant, T. Garrigoux, F. Gaté, G. Giavitto, B. Giebels, D. Glawion, J. F. Glicenstein, D. Gottschall, M.-H. Grondin, J. Hahn, M. Haupt, J. Hawkes, G. Heinzelmann, G. Henri, G. Hermann, J. A. Hinton, W. Hofmann, C. Hoischen, T. L. Holch, M. Holler, D. Horns, A. Ivascenko, H. Iwasaki, A. Jacholkowska, M. Jamrozy, D. Jankowsky, F. Jankowsky, M. Jingo, L. Jouvin, I. Jung-Richardt, M. A. Kastendieck, K. Katarzyński, M. Katsuragawa, D. Kerszberg, D. Khangulyan, B. Khélifi, J. King, S. Klepser, D. Klochkov, W. Kluźniak, Nu. Komin, K. Kosack, S. Krakau, M. Kraus, P. P. Krüger, H. Laffon, G. Lamanna, J. Lau, J.-P. Lees, J. Lefaucheur, A. Lemière, M. Lemoine-Goumard, J.-P. Lenain, E. Leser, T. Lohse, M. Lorentz, R. Liu, I. Lypova, D. Malyshev, V. Marandon, A. Marcowith, C. Mariaud, R. Marx, G. Maurin, N. Maxted, M. Mayer, P. J. Meintjes, M. Meyer, A. M. W. Mitchell, R. Moderski, M. Mohamed, L. Mohrmann, K. Morå, E. Moulin, T. Murach, S. Nakashima, M. de Naurois, H. Ndiyavala, F. Niederwanger, J. Niemiec, L. Oakes, P. O'Brien, H. Odaka, S. Ohm, M. Ostrowski, I. Oya, M. Padovani, M. Panter, R. D. Parsons, N. W. Pekeur, G. Pelletier, C. Perennes, P.-O. Petrucci, B. Peyaud, Q. Piel, S. Pita, V. Poireau, H. Poon, D. Prokhorov, H. Prokoph, G. Pühlhofer, M. Punch, A. Quirrenbach, S. Raab, R. Rauth, A. Reimer, O. Reimer, M. Renaud, R. de los Reyes, F. Rieger, L. Rinchiuso, C. Romoli, G. Rowell, B. Rudak, C. B. Rulten, V. Sahakian, S. Saito, D. A. Sanchez, A. Santangelo, M. Sasaki, R. Schlickeiser, F. Schüssler, A. Schulz, U. Schwanke, S. Schwemmer, M. Seglar-Arroyo, M. Settimo, A. S. Seyffert, N. Shafi, I. Shilon, K. Shiningayamwe, R. Simoni, H. Sol, F. Spanier, M. Spir-Jacob, Ł. Stawarz, R. Steenkamp, C. Stegmann, C. Steppa, I. Sushch, T. Takahashi, J.-P. Tavernet, T. Tavernier, A. M. Taylor, R. Terrier, L. Tibaldo, D. Tiziani, M. Tluczykont, C. Trichard, M. Tsirou, N. Tsuji, R. Tuffs, Y. Uchiyama, D. J. van der Walt, C. van Eldik, C. van Rensburg, B. van Soelen, G. Vasileiadis, J. Veh, C. Venter, A. Viana, P. Vincent, J. Vink, F. Voisin, H. J. Völk, T. Vuillaume, Z. Wadiasingh, S. J. Wagner, P. Wagner, R. M. Wagner, R. White, A. Wierzcholska, P. Willmann, A. Wörnlein, D. Wouters, R. Yang, D. Zaborov, M. Zacharias, R. Zanin, A. A. Zdziarski, A. Zech, F. Zefi, A. Ziegler, J. Zorn, N. Żywucka, R. P. Fender, J. W. Broderick, A. Rowlinson, R. A. M. J. Wijers, A. J. Stewart, S. ter Veen, A. Shulevski, M. Kavic, J. H. Simonetti, C. League, J. Tsai, K. S. Obenberger, K. Nathaniel, G. B. Taylor, J. D. Dowell, S. L. Liebling, J. A. Estes, M. Lippert, I. Sharma, P. Vincent, B. Farella, A. U. Abeysekara, A. Albert, R. Alfaro, C. Alvarez, R. Arceo, J. C. Arteaga-Velázquez, D. Avila Rojas, H. A. Ayala Solares, A. S. Barber, J. Becerra Gonzalez, A. Becerril, E. Belmont-Moreno, S. Y. BenZvi, D. Berley, A. Bernal, J. Braun, C. Brisbois, K. S. Caballero-Mora, T. Capistrán, A. Carramiñana, S. Casanova, M. Castillo, U. Cotti, J. Cotzomi, S. Coutiño de León, C. De León, E. De la Fuente, R. Diaz Hernandez, S. Dichiara, B. L. Dingus, M. A. DuVernois, J. C. Díaz-Vélez, R. W. Ellsworth, K. Engel, O. Enríquez-Rivera, D. W. Fiorino, H. Fleischhack, N. Fraija, J. A. García-González, F. Garfias, M. Gerhardt, A. Gonzõlez Muñoz, M. M. González, J. A. Goodman, Z. Hampel-Arias, J. P. Harding, S. Hernandez, A. Hernandez-Almada, B. Hona, P. Hüntemeyer, A. Iriarte, A. Jardin-Blicq, V. Joshi, S. Kaufmann, D. Kieda, A. Lara, R. J. Lauer, D. Lennarz, H. León Vargas, J. T. Linnemann, A. L. Longinotti, G. Luis Raya, R. Luna-García, R. López-Coto, K. Malone, S. S. Marinelli, O. Martinez, I. Martinez-Castellanos, J. Martínez-Castro, H. Martínez-Huerta, J. A. Matthews, P. Miranda-Romagnoli, E. Moreno, M. Mostafá, L. Nellen, M. Newbold, M. U. Nisa, R. Noriega-Papaqui, R. Pelayo, J. Pretz, E. G. Pérez-Pérez, Z. Ren, C. D. Rho, C. Rivière, D. Rosa-González, M. Rosenberg, E. Ruiz-Velasco, H. Salazar, F. Salesa Greus, A. Sandoval, M. Schneider, H. Schoorlemmer, G. Sinnis, A. J. Smith, R. W. Springer, P. Surajbali, O. Tibolla, K. Tollefson, I. Torres, T. N. Ukwatta, T. Weisgarber, S. Westerhoff, I. G. Wisher, J. Wood, T. Yapici, G. B. Yodh, P. W. Younk, H. Zhou, J. D. Álvarez, A. Aab, P. Abreu, M. Aglietta, I. F. M. Albuquerque, J. M. Albury, I. Allekotte, A. Almela, J. Alvarez Castillo, J. Alvarez-Muñiz, G. A. Anastasi, L. Anchordoqui, B. Andrada, S. Andringa, C. Aramo, N. Arsene, H. Asorey, P. Assis, G. Avila, A. M. Badescu, A. Balaceanu, F. Barbato, R. J. Barreira Luz, K. H. Becker, J. A. Bellido, C. Berat, M. E. Bertaina, X. Bertou, P. L. Biermann, J. Biteau, S. G. Blaess, A. Blanco, J. Blazek, C. Bleve, M. Boháčová, C. Bonifazi, N. Borodai, A. M. Botti, J. Brack, I. Brancus, T. Bretz, A. Bridgeman, F. L. Briechle, P. Buchholz, A. Bueno, S. Buitink, M. Buscemi, K. S. Caballero-Mora, L. Caccianiga, A. Cancio, F. Canfora, R. Caruso, A. Castellina, F. Catalani, G. Cataldi, L. Cazon, A. G. Chavez, J. A. Chinellato, J. Chudoba, R. W. Clay, A. C. Cobos Cerutti, R. Colalillo, A. Coleman, L. Collica, M. R. Coluccia, R. Conceição, G. Consolati, F. Contreras, M. J. Cooper, S. Coutu, C. E. Covault, J. Cronin, S. D'Amico, B. Daniel, S. Dasso, K. Daumiller, B. R. Dawson, J. A. Day, R. M. de Almeida, S. J. de Jong, G. De Mauro, J. R. T. de Mello Neto, I. De Mitri, J. de Oliveira, V. de Souza, J. Debatin, O. Deligny, M. L. Díaz Castro, F. Diogo, C. Dobrigkeit, J. C. D'Olivo, Q. Dorosti, R. C. Dos Anjos, M. T. Dova, A. Dundovic, J. Ebr, R. Engel, M. Erdmann, M. Erfani, C. O. Escobar, J. Espadanal, A. Etchegoyen, H. Falcke, J. Farmer, G. Farrar, A. C. Fauth, N. Fazzini, F. Feldbusch, F. Fenu, B. Fick, J. M. Figueira, A. Filipčič, M. M. Freire, T. Fujii, A. Fuster, R. Gaïor, B. García, F. Gaté, H. Gemmeke, A. Gherghel-Lascu, P. L. Ghia, U. Giaccari, M. Giammarchi, M. Giller, D. Głas, C. Glaser, G. Golup, M. Gómez Berisso, P. F. Gómez Vitale, N. González, A. Gorgi, M. Gottowik, A. F. Grillo, T. D. Grubb, F. Guarino, G. P. Guedes, R. Halliday, M. R. Hampel, P. Hansen, D. Harari, T. A. Harrison, V. M. Harvey, A. Haungs, T. Hebbeker, D. Heck, P. Heimann, A. E. Herve, G. C. Hill, C. Hojvat, E. Holt, P. Homola, J. R. Hörandel, P. Horvath, M. Hrabovský, T. Huege, J. Hulsman, A. Insolia, P. G. Isar, I. Jandt, J. A. Johnsen, M. Josebachuili, J. Jurysek, A. Kääpä, K. H. Kampert, B. Keilhauer, N. Kemmerich, J. Kemp, R. M. Kieckhafer, H. O. Klages, M. Kleifges, J. Kleinfeller, R. Krause, N. Krohm, D. Kuempel, G. Kukec Mezek, N. Kunka, A. Kuotb Awad, B. L. Lago, D. LaHurd, R. G. Lang, M. Lauscher, R. Legumina, M. A. Leigui de Oliveira, A. Letessier-Selvon, I. Lhenry-Yvon, K. Link, D. Lo Presti, L. Lopes, R. López, A. López Casado, R. Lorek, Q. Luce, A. Lucero, M. Malacari, M. Mallamaci, D. Mandat, P. Mantsch, A. G. Mariazzi, I. C. Maris, G. Marsella, D. Martello, H. Martinez, O. Martínez Bravo, J. J. Masías Meza, H. J. Mathes, S. Mathys, J. Matthews, G. Matthiae, E. Mayotte, P. O. Mazur, C. Medina, G. Medina-Tanco, D. Melo, A. Menshikov, K.-D. Merenda, S. Michal, M. I. Micheletti, L. Middendorf, L. Miramonti, B. Mitrica, D. Mockler, S. Mollerach, F. Montanet, C. Morello, G. Morlino, A. L. Müller, G. Müller, M. A. Muller, S. Müller, R. Mussa, I. Naranjo, P. H. Nguyen, M. Niculescu-Oglinzanu, M. Niechciol, L. Niemietz, T. Niggemann, D. Nitz, D. Nosek, V. Novotny, L. Nožka, L. A. Núñez, F. Oikonomou, A. Olinto, M. Palatka, J. Pallotta, P. Papenbreer, G. Parente, A. Parra, T. Paul, M. Pech, F. Pedreira, J. Pȩkala, J. Peña-Rodriguez, L. A. S. Pereira, M. Perlin, L. Perrone, C. Peters, S. Petrera, J. Phuntsok, T. Pierog, M. Pimenta, V. Pirronello, M. Platino, M. Plum, J. Poh, C. Porowski, R. R. Prado, P. Privitera, M. Prouza, E. J. Quel, S. Querchfeld, S. Quinn, R. Ramos-Pollan, J. Rautenberg, D. Ravignani, J. Ridky, F. Riehn, M. Risse, P. Ristori, V. Rizi, W. Rodrigues de Carvalho, G. Rodriguez Fernandez, J. Rodriguez Rojo, M. J. Roncoroni, M. Roth, E. Roulet, A. C. Rovero, P. Ruehl, S. J. Saffi, A. Saftoiu, F. Salamida, H. Salazar, A. Saleh, G. Salina, F. Sánchez, P. Sanchez-Lucas, E. M. Santos, E. Santos, F. Sarazin, R. Sarmento, C. Sarmiento-Cano, R. Sato, M. Schauer, V. Scherini, H. Schieler, M. Schimp, D. Schmidt, O. Scholten, P. Schovánek, F. G. Schröder, S. Schröder, A. Schulz, J. Schumacher, S. J. Sciutto, A. Segreto, A. Shadkam, R. C. Shellard, G. Sigl, G. Silli, R. Šmída, G. R. Snow, P. Sommers, S. Sonntag, J. F. Soriano, R. Squartini, D. Stanca, S. Stanič, J. Stasielak, P. Stassi, M. Stolpovskiy, F. Strafella, A. Streich, F. Suarez, M. Suarez-Durán, T. Sudholz, T. Suomijärvi, A. D. Supanitsky, J. Šupík, J. Swain, Z. Szadkowski, A. Taboada, O. A. Taborda, C. Timmermans, C. J. Todero Peixoto, L. Tomankova, B. Tomé, G. Torralba Elipe, P. Travnicek, M. Trini, M. Tueros, R. Ulrich, M. Unger, M. Urban, J. F. Valdés Galicia, I. Valiño, L. Valore, G. van Aar, P. van Bodegom, A. M. van den Berg, A. van Vliet, E. Varela, B. Vargas Cárdenas, R. A. Vázquez, D. Veberič, C. Ventura, I. D. Vergara Quispe, V. Verzi, J. Vicha, L. Villaseñor, S. Vorobiov, H. Wahlberg, O. Wainberg, D. Walz, A. A. Watson, M. Weber, A. Weindl, M. Wiedeński, L. Wiencke, H. Wilczyński, M. Wirtz, D. Wittkowski, B. Wundheiler, L. Yang, A. Yushkov, E. Zas, D. Zavrtanik, M. Zavrtanik, A. Zepeda, B. Zimmermann, M. Ziolkowski, Z. Zong, F. Zuccarello, S. Kim, S. Schulze, F. E. Bauer, J. M. Corral-Santana, I. de Gregorio-Monsalvo, J. González-López, D. H. Hartmann, C. H. Ishwara-Chandra, S. Martín, A. Mehner, K. Misra, M. J. Michałowski, L. Resmi, Z. Paragi, I. Agudo, T. An, R. Beswick, C. Casadio, S. Frey, P. Jonker, M. Kettenis, B. Marcote, J. Moldon, A. Szomoru, H. J. van Langevelde, J. Yang, A. Cwiek, M. Cwiok, H. Czyrkowski, R. Dabrowski, G. Kasprowicz, L. Mankiewicz, K. Nawrocki, R. Opiela, L. W. Piotrowski, G. Wrochna, M. Zaremba, A. F. Żarnecki, D. Haggard, M. Nynka, J. J. Ruan, P. A. Bland, T. Booler, H. A. R. Devillepoix, J. S. de Gois, P. J. Hancock, R. M. Howie, J. Paxman, E. K. Sansom, M. C. Towner, J. Tonry, M. Coughlin, C. W. Stubbs, L. Denneau, A. Heinze, B. Stalder, H. Weiland, R. P. Eatough, M. Kramer, A. Kraus, E. Troja, L. Piro, J. Becerra González, N. R. Butler, O. D. Fox, H. G. Khandrika, A. Kutyrev, W. H. Lee, R. Ricci, R. E. Ryan Jr., R. Sánchez-Ramírez, S. Veilleux, A. M. Watson, M. H. Wieringa, J. M. Burgess, H. van Eerten, C. J. Fontes, C. L. Fryer, O. Korobkin, R. T. Wollaeger, F. Camilo, A. R. Foley, S. Goedhart, S. Makhathini, N. Oozeer, O. M. Smirnov, R. P. Fender, P. A. Woudt

    The Astrophysical Journal   Vol. 848 ( 2 ) page: L12 - L12   2017.10

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    On 2017 August 17 a binary neutron star coalescence candidate (later designated GW170817) with merger time 12:41:04 UTC was observed through gravitational waves by the Advanced LIGO and Advanced Virgo detectors. The Fermi Gamma-ray Burst Monitor independently detected a gamma-ray burst (GRB 170817A) with a time delay of similar to 1.7 s with respect to the merger time. From the gravitational-wave signal, the source was initially localized to a sky region of 31 deg(2) at a luminosity distance of 40(-8)(+8) Mpc and with component masses consistent with neutron stars. The component masses were later measured to be in the range 0.86 to 2.26 M-circle dot. An extensive observing campaign was launched across the electromagnetic spectrum leading to the discovery of a bright optical transient (SSS17a, now with the IAU identification of AT 2017gfo) in NGC 4993 (at similar to 40 Mpc) less than 11 hours after the merger by the One-Meter, Two Hemisphere (1M2H) team using the 1 m Swope Telescope. The optical transient was independently detected by multiple teams within an hour. Subsequent observations targeted the object and its environment. Early ultraviolet observations revealed a blue transient that faded within 48 hours. Optical and infrared observations showed a redward evolution over similar to 10 days. Following early non-detections, X-ray and radio emission were discovered at the transient's position similar to 9 and similar to 16 days, respectively, after the merger. Both the X-ray and radio emission likely arise from a physical process that is distinct from the one that generates the UV/optical/near-infrared emission. No ultra-high-energy gamma-rays and no neutrino candidates consistent with the source were found in follow-up searches. These observations support the hypothesis that GW170817 was produced by the merger of two neutron stars in NGC4993 followed by a short gamma-ray burst (GRB 170817A) and a kilonova/macronova powered by the radioactive decay of r-process nuclei synthesized in the ejecta.

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  118. Blind Millimeter Line Emitter Search using ALMA Data Toward Gravitational Lensing Clusters Reviewed

    Yuki Yamaguchi, Kotaro Kohno, Yoichi Tamura, Masamune Oguri, Hajime Ezawa, Natsuki H. Hayatsu, Tetsu Kitayama, Yuichi Matsuda, Hiroshi Matsuo, Tai Oshima, Naomi Ota, Takuma Izumi, Hideki Umehata

    The Astrophysical Journal   Vol. 845 ( 2 ) page: 108 - 108   2017.8

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    We present the results of a blind millimeter line emitter search using ALMA
    Band 6 data with a single frequency tuning toward four gravitational lensing
    clusters (RXJ1347.5-1145, Abell S0592, MACS J0416.1-2403, and Abell 2744). We
    construct three-dimensional signal-to-noise ratio (S/N) cubes with 60 MHz and
    100 MHz binning, and search for millimeter line emitters. We do not detect any
    line emitters with a peak S/N > 5, although we do find a line emitter candidate
    with a peak S/N ~ 4.5. These results provide upper limits to the CO(3-2),
    CO(4-3), CO(5-4), and [CII] luminosity functions at z ~ 0.3, 0.7, 1.2, and 6,
    respectively. Because of the magnification effect of gravitational lensing
    clusters, the new data provide the first constraints on the CO and [CII]
    luminosity functions at unprecedentedly low luminosity levels, i.e., down to
    $<~ 10^{-3}-10^{-1} $Mpc$^{-3}$ dex$^{-1}$ at $L'_{CO} ~ 10^8-10^{10}$ K km
    $s^{-1}$ pc$^2$ and $<~ 10^{-3}-10^{-2}$ Mpc$^{-3}$ dex$^{-1}$ at $L_[CII] ~
    10^8-10^{10} L_\odot$, respectively. Although the constraints to date are not
    stringent yet, we find that the evolution of the CO and [CII] luminosity
    functions are broadly consistent with the predictions of semi-analytical
    models. This study demonstrates that the wide observations with a single
    frequency tuning toward gravitational lensing clusters are promising for
    constraining the CO and [CII] luminosity functions.

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  119. Properties of molecular gas in galaxies in the early and mid stages of interaction. II. Molecular gas fraction Reviewed

    Kaneko, Hiroyuki, Kuno, Nario, Iono, Daisuke, Tamura, Yoichi, Tosaki, Tomoka, Nakanishi, Kouichiro, Sawada, Tsuyoshi

    Publications of the Astronomical Society of Japan   Vol. 69 ( 4 )   2017.8

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    We have investigated properties of the interstellar medium in interacting galaxies in early and mid stages using mapping data of <SUP>12</SUP>CO(J = 1-0) and H i. Assuming the standard CO-H<SUB>2</SUB> conversion factor, we found no difference in molecular gas mass, atomic gas mass, and total gas mass (the sum of atomic and molecular gas mass) between interacting galaxies and isolated galaxies. However, interacting galaxies have a higher global molecular gas fraction f_{mol}^{global} (the ratio of molecular gas mass to total gas mass averaged over a whole galaxy) at 0.71 ± 0.15 than isolated galaxies (0.52 ± 0.18). The distribution of the local molecular gas fraction f<SUB>mol</SUB>, the ratio of the surface density of molecular gas to that of the total gas, is different from the distribution in typical isolated galaxies. By a pixel-to-pixel comparison, isolated spiral galaxies show a gradual increase in f<SUB>mol</SUB> along the surface density of total gas until it is saturated at 1.0, while interacting galaxies show no clear relation. We performed pixel-to-pixel theoretical model fits by varying metallicity and external pressure. According to the model fitting, external pressure can explain the trend of f<SUB>mol</SUB> in the interacting galaxies. Assuming half of the standard CO-H<SUB>2</SUB> conversion factor for interacting galaxies, the results of pixel-to-pixel theoretical model fitting get worse than adopting the standard conversion factor, although f_{mol}^{global} of interacting galaxies (0.62 ± 0.17) becomes the same as in isolated galaxies. We conclude that external pressure occurs due to the shock prevailing over a whole galaxy or due to collisions between giant molecular clouds even in the early stage of the interaction. The external pressure accelerates an efficient transition from atomic gas to molecular gas. Regarding the chemical timescale, high f<SUB>mol</SUB> can be achieved at the very early stage of interaction even if the shock induced by the collision of galaxies ionizes interstellar gas. <P />...

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  120. ALMA Observations of the Gravitational Lens SDP.9 Reviewed

    Wong, Kenneth C., Ishida, Tsuyoshi, Tamura, Yoichi, Suyu, Sherry H., Oguri, Masamune, Matsushita, Satoki

    The Astrophysical Journal   Vol. 843 ( 2 )   2017.7

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    We present long-baseline ALMA observations of the strong gravitational lens H-ATLAS J090740.0-004200 (SDP.9), which consists of an elliptical galaxy at {z}<SUB>{ { L</SUB> } }=0.6129 lensing a background submillimeter galaxy into two extended arcs. The data include Band 6 continuum observations, as well as CO J = 6-5 molecular line observations, from which we measure an updated source redshift of {z}<SUB>{ { S</SUB> } }=1.5747. The image morphology in the ALMA data is different from that of the Hubble Space Telescope (HST) data, indicating a spatial offset between the stellar, gas, and dust component of the source galaxy. We model the lens as an elliptical power law density profile with external shear using a combination of archival HST data and conjugate points identified in the ALMA data. Our best model has an Einstein radius of {θ }<SUB>{ { E</SUB> } }=0.66+/- 0.01 and a slightly steeper than isothermal mass profile slope. We search for the central image of the lens, which can be used constrain the inner mass distribution of the lens galaxy including the central supermassive black hole, but do not detect it in the integrated CO image at a 3σ rms level of 0.0471 Jy km s<SUP>-1</SUP>....

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  121. A Radio-to-mm Census of Star-forming Galaxies in Protocluster 4C23.56 at Z = 2.5: Gas Mass and Its Fraction Revealed with ALMA Reviewed

    Minju M. Lee, Ichi Tanaka, Ryohei Kawabe, Kotaro Kohno, Tadayuki Kodama, Masaru Kajisawa, Min S. Yun, Kouichiro Nakanishi, Daisuke Iono, Yoichi Tamura, Bunyo Hatsukade, Hideki Umehata, Toshiki Saito, Takuma Izumi, Itziar Aretxaga, Ken-ichi Tadaki, Milagros Zeballos, Soh Ikarashi, Grant W. Wilson, David H. Hughes, R. J. Ivison

    The Astrophysical Journal   Vol. 842 ( 1 ) page: 55 - 55   2017.6

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    We investigate gas contents of star-forming galaxies associated with
    protocluster 4C23.56 at z = 2.49 by using the redshifted CO(3-2) and 1.1 mm
    dust continuum with the Atacama Large Millimeter/submillimeter Array. The
    observations unveil seven CO detections out of 22 targeted H$\alpha$ emitters
    (HAEs) and four out of 19 in 1.1 mm dust continuum. They have high stellar mass
    ($M_{\star}>4\times 10^{10}$ $M_{\odot}$) and exhibit a specific star-formation
    rate typical of main-sequence star forming galaxies at $z\sim2.5$. Different
    gas mass estimators from CO(3-2) and 1.1 mm yield consistent values for
    simultaneous detections. The gas mass ($M_{\rm gas}$) and gas fraction ($f_{\rm
    gas}$) are comparable to those of field galaxies, with $M_{\rm gas}=[0.3,
    1.8]\times10^{11} \times (\alpha_{\rm CO}/(4.36\times A(Z)$)) M$_{\odot}$,
    where $\alpha_{\rm CO}$ is the CO-to-H$_2$ conversion factor and $A(Z)$ the
    additional correction factor for the metallicity dependence of $\alpha_{\rm
    CO}$, and $\langle f_{\rm gas}\rangle = 0.53 \pm 0.07$ from CO(3-2). Our
    measurements place a constraint on the cosmic gas density of high-$z$
    protoclusters, indicating the protocluster is characterized by a gas density
    higher than that of the general fields by an order of magnitude. We found $\rho
    (H_2)\sim 5 \times 10^9 \,M_{\odot}\,{\rm Mpc^{-3 } }$ with the CO(3-2)
    detections. The five ALMA CO detections occur in the region of highest galaxy
    surface density, where the density positively correlates with global
    star-forming efficiency (SFE) and stellar mass. Such correlations imply a
    potentially critical role of environment on early galaxy evolution at high-z
    protoclusters, although future observations are necessary for confirmation.

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  122. Evolutionary Phases of Gas-rich Galaxies in a Galaxy Cluster at z = 1.46 Reviewed

    Hayashi, Masao, Kodama, Tadayuki, Kohno, Kotaro, Yamaguchi, Yuki, Tadaki, Ken-ichi, Hatsukade, Bunyo, Koyama, Yusei, Shimakawa, Rhythm, Tamura, Yoichi, Suzuki, Tomoko L.

    The Astrophysical Journal   Vol. 841 ( 2 )   2017.6

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    We report a survey of molecular gas in galaxies in the XMMXCS J2215.9-1738 cluster at z = 1.46. We have detected emission lines from 17 galaxies within a radius of R <SUB>200</SUB> from the cluster center, in Band 3 data of the Atacama Large Millimeter/submillimeter Array, with a coverage of 93-95 GHz in frequency and 2.33 arcmin<SUP>2</SUP> in spatial direction. The lines are all identified as CO J = 2-1 emission lines from cluster members at z̃ 1.46 by their redshifts and the colors of their optical and near-infrared (NIR) counterparts. The line luminosities reach down to {L}<SUB>{CO</SUB>(2{--}1)}<SUP>\prime </SUP>=4.5× {10}<SUP>9</SUP> K km s<SUP>-1</SUP> pc<SUP>2</SUP>. The spatial distribution of galaxies with a detection of CO(2-1) suggests that they disappear from the very center of the cluster. The phase-space diagram showing relative velocity versus cluster-centric distance indicates that the gas-rich galaxies have entered the cluster more recently than the gas-poor star-forming galaxies and passive galaxies located in the virialized region of this cluster. The results imply that the galaxies experienced ram-pressure stripping and/or strangulation during the course of infall toward the cluster center and then the molecular gas in the galaxies at the cluster center was depleted by star formation....

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  123. ALMA deep field in SSA22: Blindly detected CO emitters and [C II] emitter candidates Reviewed

    Hayatsu, Natsuki H., Matsuda, Yuichi, Umehata, Hideki, Yoshida, Naoki, Smail, Ian, Swinbank, A. Mark, Ivison, Rob, Kohno, Kotaro, Tamura, Yoichi, Kubo, Mariko, Iono, Daisuke, Hatsukade, Bunyo, Nakanishi, Kouichiro, Kawabe, Ryohei, Nagao, Tohru, Inoue, Akio K., Takeuchi, Tsutomu T., Lee, Minju, Ao, Yiping, Fujimoto, Seiji, Izumi, Takuma, Yamaguchi, Yuki, Ikarashi, Soh, Yamada, Toru

    Publications of the Astronomical Society of Japan   Vol. 69 ( 3 )   2017.6

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    We report the identification of four millimeter line-emitting galaxies with the Atacama Large Milli/submillimeter Array (ALMA) in SSA22 Field (ADF22). We analyze the ALMA 1.1-mm survey data, with an effective survey area of 5 arcmin<SUP>2</SUP>, frequency ranges of 253.1-256.8 and 269.1-272.8 GHz, angular resolution of 0{^''<SUB>.</SUB>}7 and rms noise of 0.8 mJy beam<SUP>-1</SUP> at 36 km s<SUP>-1</SUP> velocity resolution. We detect four line-emitter candidates with significance levels above 6σ. We identify one of the four sources as a CO(9-8) emitter at z = 3.1 in a member of the proto-cluster known in this field. Another line emitter with an optical counterpart is likely a CO(4-3) emitter at z = 0.7. The other two sources without any millimeter continuum or optical/near-infrared counterpart are likely to be [C II] emitter candidates at z = 6.0 and 6.5. The equivalent widths of the [C II] candidates are consistent with those of confirmed high-redshift [C II] emitters and candidates, and are a factor of 10 times larger than that of the CO(9-8) emitter detected in this search. The [C II] luminosity of the candidates are 4-7 × 10<SUP>8</SUP> L<SUB>☉</SUB>. The star formation rates (SFRs) of these sources are estimated to be 10-20 M<SUB>☉</SUB> yr<SUP>-1</SUP> if we adopt an empirical [C II] luminosity-SFR relation. One of them has a relatively low S/N ratio, but shows features characteristic of emission lines. Assuming that at least one of the two candidates is a [C II] emitter, we derive a lower limit of [C II]-based star formation rate density (SFRD) at z ̃ 6. The resulting value of &gt;10<SUP>-2</SUP> M<SUB>☉</SUB> yr<SUP>-1</SUP> Mpc<SUP>-3</SUP> is consistent with the dust-uncorrected UV-based SFRD. Future millimeter/submillimeter surveys can be used to detect a number of high-redshift line emitters, with which to study the star formation history in the early universe....

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  124. Rotating Starburst Cores in Massive Galaxies at z = 2.5 Reviewed

    Tadaki, Ken-ichi, Kodama, Tadayuki, Nelson, Erica J., Belli, Sirio, Förster Schreiber, Natascha M., Genzel, Reinhard, Hayashi, Masao, Herrera-Camus, Rodrigo, Koyama, Yusei, Lang, Philipp, Lutz, Dieter, Shimakawa, Rhythm, Tacconi, Linda J., Übler, Hannah, Wisnioski, Emily, Wuyts, Stijn, Hatsukade, Bunyo, Lippa, Magdalena, Nakanishi, Kouichiro, Ikarashi, Soh, Kohno, Kotaro, Suzuki, Tomoko L., Tamura, Yoichi, Tanaka, Ichi

    The Astrophysical Journal   Vol. 841 ( 2 )   2017.6

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    We present spatially resolved ALMA observations of the CO J=3-2 emission line in two massive galaxies at z = 2.5 on the star-forming main sequence. Both galaxies have compact dusty star-forming cores with effective radii of {R}<SUB>{ { e</SUB> } }=1.3+/- 0.1 {kpc} and {R}<SUB>{ { e</SUB> } }=1.2+/- 0.1 {kpc} in the 870 μm continuum emission. The spatial extent of star-forming molecular gas is also compact with {R}<SUB>{ { e</SUB> } }=1.9+/- 0.4 {kpc} and {R}<SUB>{ { e</SUB> } }=2.3+/- 0.4 {kpc}, but more extended than the dust emission. Interpreting the observed position-velocity diagrams with dynamical models, we find the starburst cores to be rotation dominated with the ratio of the maximum rotation velocity to the local velocity dispersion of {v}<SUB>\max </SUB>/{σ }<SUB>0</SUB>={7.0}<SUB>-2.8</SUB><SUP>+2.5</SUP> ({v}<SUB>\max </SUB>={386}<SUB>-32</SUB><SUP>+36</SUP> km s<SUP>-1</SUP>) and {v}<SUB>\max </SUB>/{σ }<SUB>0</SUB>={4.1}<SUB>-1.5</SUB><SUP>+1.7</SUP> ({v}<SUB>\max </SUB>={391}<SUB>-41</SUB><SUP>+54</SUP> km s<SUP>-1</SUP>). Given that the descendants of these massive galaxies in the local universe are likely ellipticals with v/σ nearly an order of magnitude lower, the rapidly rotating galaxies would lose significant net angular momentum in the intervening time. The comparisons among dynamical, stellar, gas, and dust mass suggest that the starburst CO-to-H<SUB>2</SUB> conversion factor of {α }<SUB>{CO</SUB>}=0.8 {M}<SUB>☉ </SUB> (K km s<SUP>-1</SUP> pc<SUP>-2</SUP>)<SUP>-1</SUP> is appropriate in the spatially resolved cores. The dense cores are likely to be formed in extreme environments similar to the central regions of local ultraluminous infrared galaxies. Our work also demonstrates that a combination of medium-resolution CO and high-resolution dust continuum observations is a powerful tool for characterizing the dynamical state of molecular gas in distant galaxies....

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  125. A statistical study of giant molecular clouds traced by <SUP>13</SUP>CO, C<SUP>18</SUP>O, CS, and CH<SUB>3</SUB>OH in the disk of NGC 1068 based on ALMA observations Reviewed

    Tosaki, Tomoka, Kohno, Kotaro, Harada, Nanase, Tanaka, Kunihiko, Egusa, Fumi, Izumi, Takuma, Takano, Shuro, Nakajima, Taku, Taniguchi, Akio, Tamura, Yoichi

    Publications of the Astronomical Society of Japan   Vol. 69 ( 2 )   2017.4

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    We present 1{^''<SUB>.</SUB>}4 (98 pc) resolution ALMA observations of <SUP>13</SUP>CO(J = 1-0), C<SUP>18</SUP>O(J = 1-0), CS(J = 2-1), and CH<SUB>3</SUB>OH(J<SUB>K</SUB> = 2<SUB>K</SUB>-1<SUB>K</SUB>) molecular rotational lines in the central 1΄ (4.2 kpc) diameter region of NGC 1068 to study the physical and chemical properties of giant molecular clouds (GMCs) and to test whether these GMC-scale properties are linked to the larger-scale galactic environment. Using the derived <SUP>13</SUP>CO cube, we have identified 187 high-significance (&gt;8 σ) GMCs by employing the CLUMPFIND algorithm. The molecular gas masses of GMCs (M_^{13CO}), derived from the <SUP>13</SUP>CO data, range from 1.8 × 10<SUP>4</SUP> M<SUB>☉</SUB> to 4.2 × 10<SUP>7</SUP> M<SUB>☉</SUB>. A mass function of GMCs in NGC 1068 has been obtained for the first time at ∼100 pc resolution. We find the slope of the mass function γ = -1.25 ± 0.07 for a mass range of M_^{13CO} ≥ 10<SUP>5</SUP> M<SUB>☉</SUB>. This is shallower than the GMCs in the disk regions of the Milky Way, M 51, and NGC 300. Further, we find that the high mass cut-off of the GMC mass function occurs at M_^{13CO} ̃ 6 × 10<SUP>7</SUP> M<SUB>☉</SUB>, which is an order of magnitude larger than that in the nuclear bar region of M 51, indicating that the more massive clouds dominate the mass budget in NGC 1068. The observed C<SUP>18</SUP>O(J = 1-0)/<SUP>13</SUP>CO(J = 1-0) intensity ratios are found to be fairly uniform (0.27 ± 0.05) among the identified GMCs. In contrast, the CH<SUB>3</SUB>OH(J<SUB>K</SUB> = 2<SUB>K</SUB>-1<SUB>K</SUB>)/<SUP>13</SUP>CO(J = 1-0) ratios exhibit striking spatial variation across the disk, with the smallest values around the bar-end (&lt;0.03), and larger ratios along the spiral arms (∼0.1-0.2). We find that GMCs with detectable methanol emission tend to have systematically larger velocity widths than those without methanol emission, suggesting that (relatively weak) shocks are responsible for the enhancement of the CH<SUB>3</SUB>OH/<SUP>13</SUP>CO ratios of GMCs in the disk of NGC 1068. <P />...

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  126. J-GEM follow-up observations of the gravitational wave source GW151226 Reviewed

    Yoshida, Michitoshi, Utsumi, Yousuke, Tominaga, Nozomu, Morokuma, Tomoki, Tanaka, Masaomi, Asakura, Yuichiro, Matsubayashi, Kazuya, Ohta, Kouji, Abe, Fumio, Chimasu, Sho, Furusawa, Hisanori, Itoh, Ryosuke, Itoh, Yoichi, Kanda, Yuka, Kawabata, Koji S, Kawabata, Miho, Koshida, Shintaro, Koshimoto, Naoki, Kuroda, Daisuke, Moritani, Yuki, Motohara, Kentaro, Murata, Katsuhiro L, Nagayama, Takahiro, Nakaoka, Tatsuya, Nakata, Fumiaki, Nishioka, Tsubasa, Saito, Yoshihiko, Terai, Tsuyoshi, Tristram, Paul J, Yanagisawa, Kenshi, Yasuda, Naoki, Doi, Mamoru, Fujisawa, Kenta, Kawachi, Akiko, Kawai, Nobuyuki, Tamura, Yoichi, Uemura, Makoto, Yatsu, Yoichi

    Publications of the Astronomical Society of Japan   Vol. 69 ( 1 ) page: 9   2017.2

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    We report the results of optical-infrared follow-up observations of the gravitational wave (GW) event GW151226 detected by the Advanced LIGO in the framework of J-GEM (Japanese collaboration for Gravitational wave ElectroMagnetic follow-up). We performed wide-field optical imaging surveys with the Kiso Wide Field Camera (KWFC), Hyper Suprime-Cam (HSC), and MOA-cam3. The KWFC survey started at 2.26 d after the GW event and covered 778 deg<SUP>2</SUP> centered at the high Galactic region of the skymap of GW151226. We started the HSC follow-up observations from ̃12 d after the event and covered an area of 63.5 deg<SUP>2</SUP> of the highest probability region of the northern sky with limiting magnitudes of 24.6 and 23.8 for the i and z bands, respectively. MOA-cam3 covered 145 deg<SUP>2</SUP> of the skymap with the MOA-red filter ̃2.5 mon after the GW alert. The total area covered by the wide-field surveys was 986.5 deg<SUP>2</SUP>. The integrated detection probability for the observed area was ̃29%. We also performed galaxy-targeted observations with six optical and near-infrared telescopes from 1.61 d after the event. A total of 238 nearby (≤100 Mpc) galaxies were observed with a typical I band limiting magnitude of ̃19.5. We detected 13 supernova candidates with the KWFC survey, and 60 extragalactic transients with the HSC survey. Two thirds of the HSC transients were likely supernovae and the remaining one third were possible active galactic nuclei. With our observational campaign, we found no transients that are likely to be associated with GW151226. <P />...

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  127. Extremely Red Submillimeter Galaxies: New z ≳ 4-6 Candidates Discovered using ALMA and Jansky VLA Reviewed

    Ikarashi, Soh, Ivison, R. J., Caputi, Karina I., Nakanishi, Kouichiro, Lagos, Claudia D. P., Ashby, M. L. N., Aretxaga, Itziar, Dunlop, James S., Hatsukade, Bunyo, Hughes, David H., Iono, Daisuke, Izumi, Takuma, Kawabe, Ryohei, Kohno, Kotaro, Motohara, Kentaro, Ohta, Kouji, Tamura, Yoichi, Umehata, Hideki, Wilson, Grant W., Yabe, Kiyoto, Yun, Min S.

    The Astrophysical Journal     2017.2

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    We present the detailed characterization of two extremely red submillimeter galaxies (SMGs), ASXDF1100.053.1 and 231.1, with the Atacama Large Millimeter/submillimeter Array (ALMA) and the Jansky Very Large Array. These SMGs were originally selected using AzTEC at 1100 μm, and are observed by Herschel to be faint at 100-500 μm. Their (sub)millimeter colors are as red as—or redder—than known z ≳ 5 SMGs; indeed, ASXDF1100.053.1 is redder than HFLS 3, which lies at z = 6.3. They are also faint and red in the near-/mid-infrared: ̃1 μJy at IRAC 4.5 μm and &lt;0.2 μJy in the K <SUB>s</SUB> filter. These SMGs are also faint in the radio waveband, where F <SUB>6GHz</SUB> = 4.5 μJy for ASXDF1100.053.1 and F <SUB>1.4GHz</SUB> = 28 μJy for ASXDF1100.231.1, suggestive of z={6.5}<SUB>-1.1</SUB><SUP>+1.4</SUP> and z={4.1}<SUB>-0.7</SUB><SUP>+0.6</SUP> for ASXDF1100.053.1 and 231.1, respectively. ASXDF1100.231.1 has a flux excess in the 3.6 μm filter, probably due to Hα emission at z = 4-5. Derived properties of ASXDF1100.053.1 for z = 5.5-7.5 and 231.1 for z = 3.5-5.5 are as follows: their infrared luminosities are [6.5 - 7.4] × 10<SUP>12</SUP> and [4.2-4.5] × 10<SUP>12</SUP> L <SUB>☉</SUB> their stellar masses are [0.9-2] × 10<SUP>11</SUP> and [0.4-3] × 10<SUP>10</SUP> M <SUB>☉</SUB> their circularized half-light radii in the ALMA maps are ̃1 and ≲0.2 kpc (̃2-3 kpc for 90% of the total flux). Last, their surface infrared luminosity densities, Σ<SUB>IR</SUB>, are ̃1 × 10<SUP>12</SUP> and ≳1.5 × 10<SUP>13</SUP> L <SUB>☉</SUB> kpc<SUP>-2</SUP>, similar to values seen for local (U)LIRGs. These data suggest that ASXDF1100.053.1 and 231.1 are compact SMGs at z ≳ 4 and can plausibly evolve into z ≳ 3 compact quiescent galaxies....

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  128. ALMA Deep Field in SSA22: Source Catalog and Number Counts Reviewed

    Hideki Umehata, Yoichi Tamura, Kotaro Kohno, R. J. Ivison, Ian Smail, Bunyo Hatsukade, Kouichiro Nakanishi, Yuta Kato, Soh Ikarashi, Yuichi Matsuda, Seiji Fujimoto, Daisuke Iono, Minju Lee, Charles C. Steidel, Tomoki Saito, D. M. Alexander, Min S. Yun, Mariko Kubo

    The Astrophysical Journal   Vol. 835 ( 1 ) page: 98 - 98   2017.1

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    We present results from a deep 2'x3' (comoving scale of 3.7 Mpc x 5.5 Mpc at
    z=3) survey at 1.1 mm taken with the Atacama Large Millimeter/submillimeter
    Array (ALMA) in the SSA22 field. We observe the core region of a z = 3.09
    protocluster, achieving a typical rms sensitivity of 60 micro-Jy/beam at a
    spatial resolution of 0".7. We detect 18 robust ALMA sources at a
    signal-to-noise ratio (SNR) > 5. Comparison between the ALMA map and a 1.1 mm
    map taken with the AzTEC camera on the Atacama Submillimeter Telescope
    Experiment (ASTE) indicates that three submillimeter sources discovered by the
    AzTEC/ASTE survey are resolved into eight individual submillimeter galaxies
    (SMGs) by ALMA. At least ten of our 18 ALMA SMGs have spectroscopic redshifts
    of z = 3.09, placing them in the protocluster. This shows that a number of
    dusty starburst galaxies are forming simultaneously in the core of the
    protocluster. The nine brightest ALMA SMGs with SNR > 10 have a median
    intrinsic angular size of 0".32+0".13-0".06 (2.4+1.0-0.4 physical kpc at z =
    3.09), which is consistent with previous size measurements of SMGs in other
    fields. As expected the source counts show a possible excess compared to the
    counts in the general fields at S_1.1mm >= 1.0 mJy due to the protocluster. Our
    contiguous mm mapping highlights the importance of large-scale structures on
    the formation of dusty starburst galaxies.

    DOI: 10.3847/1538-4357/835/1/98

    Web of Science

    arXiv

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  129. ALMA Reveals Strong [C II] Emission in a Galaxy Embedded in a Giant Ly α Blob at z = 3.1 Reviewed

    Hideki Umehata, Yuichi Matsuda, Yoichi Tamura, Kotaro Kohno, Ian Smail, R. J. Ivison, Charles C. Steidel, Scott C. Chapman, James E. Geach, Matthew Hayes, Tohru Nagao, Yiping Ao, Ryohei Kawabe, Min S. Yun, Bunyo Hatsukade, Mariko Kubo, Yuta Kato, Tomoki Saito, Soh Ikarashi, Kouichiro Nakanishi, Minju Lee, Takuma Izumi, Masao Mori, Masami Ouchi

    The Astrophysical Journal   Vol. 834 ( 2 )   2017.1

     More details

    Language:English   Publishing type:Research paper (scientific journal)   Publisher:American Astronomical Society  

    We report the result from observations conducted with the Atacama Large
    Millimeter/submillimeter Array (ALMA) to detect [CII] 158 um fine structure
    line emission from galaxies embedded in one of the most spectacular Lyman-alpha
    blobs (LABs) at z=3.1, SSA22-LAB1. Of three dusty star-forming galaxies
    previously discovered by ALMA 860 um dust continuum survey toward SSA22-LAB1,
    we detected the [CII] line from one, LAB1-ALMA3 at z=3.0993+/-0.0004. No line
    emission was detected, associated with the other ALMA continuum sources or from
    three rest-frame UV/optical selected z_spec~3.1 galaxies within the field of
    view. For LAB1-ALMA3, we find relatively bright [CII] emission compared to the
    infrared luminosity (L_[CII]/L_[CII]) and an extremely high [CII] 158 um and
    [NII] 205 um emission line ratio (L_[CII]/L_[NII]>55). The relatively strong
    [CII] emission may be caused by abundant photodissociation regions and
    sub-solar metallicity, or by shock heating. The origin of the unusually strong
    [CII] emission could be causally related to the location within the giant LAB,
    although the relationship between extended Lyman-alpha emission and ISM
    conditions of associated galaxies is yet to be understand.

    DOI: 10.3847/2041-8213/834/2/L16

    Web of Science

    arXiv

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  130. Bulge-forming Galaxies with an Extended Rotating Disk at z ~ 2 Reviewed

    Tadaki, Ken-ichi, Genzel, Reinhard, Kodama, Tadayuki, Wuyts, Stijn, Wisnioski, Emily, Förster Schreiber, Natascha M., Burkert, Andreas, Lang, Philipp, Tacconi, Linda J., Lutz, Dieter, Belli, Sirio, Davies, Richard I., Hatsukade, Bunyo, Hayashi, Masao, Herrera-Camus, Rodrigo, Ikarashi, Soh, Inoue, Shigeki, Kohno, Kotaro, Koyama, Yusei, Mendel, J. Trevor, Nakanishi, Kouichiro, Shimakawa, Rhythm, Suzuki, Tomoko L., Tamura, Yoichi, Tanaka, Ichi, Übler, Hannah, Wilman, Dave J.

    The Astrophysical Journal   Vol. 834 ( 2 )   2017.1

     More details

    Language:English   Publishing type:Research paper (scientific journal)   Publisher:IOP PUBLISHING LTD  

    We present 0.″2-resolution Atacama Large Millimeter/submillimeter Array observations at 870 μm for 25 Hα-seleced star-forming galaxies around the main sequence at z = 2.2-2.5. We detect significant 870 μm continuum emission in 16 (64%) of these galaxies. The high-resolution maps reveal that the dust emission is mostly radiated from a single region close to the galaxy center. Exploiting the visibility data taken over a wide uv distance range, we measure the half-light radii of the rest-frame far-infrared emission for the best sample of 12 massive galaxies with log(M<SUB>*</SUB>/M<SUB>☉</SUB>) &gt; 11. We find nine galaxies to be associated with extremely compact dust emission with R<SUB>1/2,870 μm</SUB> &lt; 1.5 kpc, which is more than a factor of 2 smaller than their rest-optical sizes, &lt; {R}<SUB>1/2,1.6μ { { m</SUB> } }&gt; =3.2 {kpc}, and is comparable with optical sizes of massive quiescent galaxies at similar redshifts. As they have an exponential disk with Sérsic index of &lt; {n}<SUB>1.6μ { { m</SUB> } }&gt; =1.2 in the rest-optical, they are likely to be in the transition phase from extended disks to compact spheroids. Given their high star formation rate surface densities within the central 1 kpc of &lt; { { Σ } }{ { SFR } }<SUB>1{kpc</SUB>}&gt; =40 M<SUB>☉</SUB> yr<SUP>-1</SUP> kpc<SUP>-2</SUP>, the intense circumnuclear starbursts can rapidly build up a central bulge with ΣM<SUB>*,1 kpc</SUB> &gt; 10<SUP>10</SUP> M<SUB>☉</SUB> kpc<SUP>-2</SUP> in several hundred megayears, I.e., by z ̃ 2. Moreover, ionized gas kinematics reveal that they are rotation supported with an angular momentum as large as that of typical star-forming galaxies at z = 1-3. Our results suggest that bulges are commonly formed in extended rotating disks by internal processes, not involving major mergers....

    DOI: 10.3847/1538-4357/834/2/135

    Web of Science

    arXiv

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MISC 65

  1. ALMAによるNGC 1068のλ=3mm帯イメージング・ラインサーベイ観測

    中島拓, 高野秀路, 濤崎智佳, 谷口暁星, 原田ななせ, 斉藤俊貴, 今西昌俊, 西村優里, 泉拓磨, 田村陽一, 河野孝太郎, HERBST Eric

    日本天文学会年会講演予稿集   Vol. 2023   2023

  2. 電離光子放射天体Mrk54における[O III]88μmと[C II]158μmの検出とその意味-高赤方偏移ALMA研究への示唆 II

    浦遼太, 橋本拓也, 久野成夫, 矢島秀伸, 井上昭雄, 菅原悠馬, 札本佳伸, FADDA Dario, 田村陽一, 萩本将都, BAKX Tom, 松尾宏, 馬渡健, 山中郷史, HAYES Matthew, PUSCHNIG Johannes, ZACKRISSON Erick, 吉田直紀, 仲里佑利奈

    日本天文学会年会講演予稿集   Vol. 2023   2023

  3. ALMAによるz=8.31のライマンブレイク銀河の300pc分解能撮像

    田村陽一, BAKX Tom, 今村千博, 萩本将都, 竹内努, 井上昭雄, 徳岡剛史, 橋本拓也, 松尾宏, 馬渡健, 松田有一, LEE Minju, 梅畑豪紀, 吉田直紀, 森脇可奈, 廿日出文洋, 河野孝太郎, 岡本崇, ZACKRISSON E., BINGGELI C., 太田一陽, 澁谷隆俊, 清水一紘, 谷口義明

    日本天文学会年会講演予稿集   Vol. 2022   2022

  4. 銀河NGC1068における60pc分解能でのHCN(1-0)/CO(1-0)強度比による高密度ガスの研究

    渡邉友海, 馬塲一晴, 高野秀路, 斉藤俊貴, 原田ななせ, 今西昌俊, 植田準子, 中島拓, 田村陽一, 谷口暁星, 河野孝太郎, 西村優里, 泉拓磨, 濤崎智佳

    日本天文学会年会講演予稿集   Vol. 2022   2022

  5. 遺伝的アルゴリズムによる自重変形を考慮した2次元パラボラ構造最適化手法の実装

    今村千博, 田村陽一, 谷口暁星, 木村俊明, 河村拓晶, 臼井彩女, 栗田光樹夫

    日本天文学会年会講演予稿集   Vol. 2022   2022

  6. 遠方銀河で観測された高い[O III]88μm/[C II]158μm光度比の原因-近傍銀河からの示唆

    浦遼太, 橋本拓也, 井上昭雄, 菅原雄馬, 札本佳伸, DARIO Fadda, 田村陽一, 萩本将都, 松尾宏, 馬渡健, 山中郷史, HAYES Matthew, PUSCHNIG Johannes, ZACKRISSON Erick

    日本天文学会年会講演予稿集   Vol. 2022   2022

  7. 赤方偏移9.1の銀河MACS1149-JD1のALMA高空間分解能観測と回転運動解析

    徳岡剛史, 井上昭雄, 橋本拓也, ELLIS Richard S., LAPORTE Nicolas, 菅原悠馬, 松尾宏, 田村陽一, 札本佳伸, 森脇可奈, ROBERTS-BORSANI Guido, 清水一紘, 山中郷史, 吉田直紀, ZACKRRISON Erik, ZHENG Wei

    日本天文学会年会講演予稿集   Vol. 2022   2022

  8. 北半球最高感度ミリ波サブミリ波ヘテロダイン受信システムLMT-FINER III.遠赤外線微細構造線による前・宇宙再電離期の銀河形成の開拓

    田村陽一, 萩本将都, 谷口暁星, 酒井剛, 小嶋崇文, 川邊良平, 河野孝太郎, 廿日出文洋, 吉村勇紀, 田中邦彦, 井上昭雄, 橋本拓也, 竹腰達哉

    日本天文学会年会講演予稿集   Vol. 2022   2022

  9. 北半球最高感度ミリ波サブミリ波ヘテロダイン受信システムLMT-FINER II.デジタルサイドバンド分離広帯域分光計の性能評価

    萩本将都, 田村陽一, 谷口暁星, 中島拓, 中野覚矢, 彦坂拓海, 鎌崎剛, 川邊良平, 吉村勇紀, 廿日出文洋, 酒井剛, 田中邦彦, 川元宏朗, 原田健一, 谷口達

    日本天文学会年会講演予稿集   Vol. 2022   2022

  10. ミリ波補償光学の開発VII.アンテナ鏡面-受信機間の超過経路長の測定による鏡面変形の評価

    中野覚矢, 田村陽一, 谷口暁星, 萩本将都, 今村千博, 中村友子, 奥村幸子, 岡田望, 川邉良平, 深作悠平

    日本天文学会年会講演予稿集   Vol. 2022   2022

  11. ミリ波補償光学の開発VI.20GHz波面センサの複素帯域透過特性の較正方法とその時間安定性の検証

    中村友子, 奥村幸子, 田村陽一, 谷口暁星, 萩本将都, 中野覚矢, 今村千博, 岡田望, 川邊良平, 深作悠平

    日本天文学会年会講演予稿集   Vol. 2022   2022

  12. Big Three Dragons: Molecular Gas in a Bright Lyman-Break Galaxy at z = 7.15

    橋本拓也, 井上昭雄, 菅原悠馬, 菅原悠馬, 札本佳伸, 札本佳伸, 藤本征史, 藤本征史, KIRSTEN Knudsen K., 松尾宏, 田村陽一, 山中郷史, 播金優一, 播金優一, 久野成夫, 小野宜昭, DRAGAN Salak

    日本天文学会年会講演予稿集   Vol. 2022   2022

  13. スパースモデリングによるz=7のLyman break銀河A1689-zD1のALMA超解像イメージング

    今村千博, 田村陽一, 谷口暁星, 中里剛, 池田思朗, 山口正行, 山口正行

    日本天文学会年会講演予稿集   Vol. 2022   2022

  14. VLAで探る超高光度超新星からの後期電波放射および母銀河の星形成活動

    廿日出文洋, 冨永望, 松田有一, 諸隈智貴, 諸隈佳菜, 田村陽一, 新沼浩太郎, 元木業人

    日本天文学会年会講演予稿集   Vol. 2022   2022

  15. Tokult-重力レンズ効果を受けた銀河の回転運動解析コード

    菅原悠馬, 菅原悠馬, 徳岡剛史, 井上昭雄, 札本佳伸, 札本佳伸, 橋本拓也, 田村陽一

    日本天文学会年会講演予稿集   Vol. 2022   2022

  16. Large Submillimeter Telescope(LST):8.コミュニティーとの連携強化

    河野孝太郎, 田村陽一, 谷口暁星, 古屋玲, 竹腰達哉, 川邊良平, 阪本成一, 石井峻, 大島泰

    日本天文学会年会講演予稿集   Vol. 2022   2022

  17. 2mm帯受信機B4R/LMT50m望遠鏡搭載によるOrion-KL領域試験観測の解析報告

    米津鉄平, 前澤裕之, 川邊良平, 吉村勇紀, 廿日出文洋, 河野孝太郎, 竹腰達哉, 酒井剛, 田中邦彦, 谷口暁星, 田村陽一, 大島泰, 島尻芳人, HUGHES David, SANCHEZ-ARGUELLES David, GOMEZ-RUIZ Arturo, RODRIGUEZ-MONTOYA Ivan, ZARAGOZA-CARDIEL Javier, COLIN Edgar, CHAVEZ-DAGOSTINO Miguel, ROJAS Sergio, SCHLOERB Pete, SOUCCAR Kamal, YUN Min

    日本天文学会年会講演予稿集   Vol. 2021   2021

  18. ミリ波補償光学の開発 V.野辺山45mミリ波望遠鏡における開口面干渉法波面センサの実証実験

    田村陽一, 谷口暁星, 戸上陽平, 萩本将都, 中野覚矢, 松田慧一, 川邉良平, 川口則幸, 南谷哲宏, 大島泰, 深作悠平, 久野成夫, 木村公洋, 岡田望, 中村友子, 奥村幸子, 小川英夫, 大西利和, 栗田光樹夫, 竹腰達哉, 河野孝太郎

    日本天文学会年会講演予稿集   Vol. 2021   2021

  19. LMT/B4Rの初期科学成果:極高光度サブミリ波銀河の一酸化炭素輝線観測

    萩本将都, 田村陽一, 谷口暁星, BAKX Tom, 松田慧一, 戸上陽平, 吉村勇紀, 廿日出文洋, 河野孝太郎, 酒井剛, 田中邦彦, 竹腰達哉, 大島泰, 川邊良平, HUGHES D., SANCHEZ-ARGUELLES D., GOMEZ-RUIZ A., RODRIGUEZ-MONTOYA I., CHAVEZ-DAGOSTINO M., SCHLOERB P., YUN M.S.

    日本天文学会年会講演予稿集   Vol. 2021   2021

  20. Test observations toward Orion-KL region using 2mm Band 4 Receiver onboard 50m Large Millimeter Telescope

    米津鉄平, 前澤裕之, 川邊良平, 吉村勇紀, 廿日出文洋, 河野孝太郎, 竹腰達哉, 酒井剛, 田中邦彦, 谷口暁星, 田村陽一, 大島泰, 島尻芳人, HUGHES David, SANCHEZ-ARGUELLES David, GOMEZ-RUIZ Arturo, RODRIGUEZ-MONTOYA Ivan, ZARAGOZA-CARDIEL Javier, COLIN Edgar, CHAVEZ-DAGOSTINO Miguel, ROJAS Sergio, SCHLOERB Pete, SOUCCAR Kamal, YUN Min

    日本地球惑星科学連合大会予稿集(Web)   Vol. 2021   2021

  21. ALMAを用いた赤方偏移6にあるクェーサーの[OI]63μm輝線観測と星間媒質の性質の解明

    石井希実, 橋本拓也, 久野成夫, 保田敦司, 河原沙帆, 浦遼太, SALAK Dragan, 道山知成, 井上昭雄, 田村陽一, 松尾宏, 馬渡健

    日本天文学会年会講演予稿集   Vol. 2021   2021

  22. 銀河形成の「ロゼッタストーン」:Hバンドドロップz~13銀河探査

    播金優一, 播金優一, 井上昭雄, 札本佳伸, 橋本拓也, 松尾宏, 田村陽一, 山中郷史

    日本天文学会年会講演予稿集   Vol. 2021   2021

  23. 重力レンズ効果を考慮した回転円盤モデルフィッティングコードの開発

    徳岡剛史, 井上昭雄, 橋本拓也, 山中郷史, 菅原悠馬, 札本佳伸, 田村陽一, 松尾宏, 吉田直紀

    日本天文学会年会講演予稿集   Vol. 2021   2021

  24. 超高輝度超新星PTF10hgiにおける後期電波放射の時間変動

    廿日出文洋, 冨永望, 林将央, 松田有一, 諸隈智貴, 諸隈佳菜, 田村陽一, 新沼浩太郎, 元木業人

    日本天文学会年会講演予稿集   Vol. 2021   2021

  25. 次世代大型サブミリ波望遠鏡の分光観測に向けたデータ科学の応用

    谷口暁星, 田村陽一, 遠藤光, BRACKENHOFF Stefanie, 唐津謙一, 竹腰達哉, 河野孝太郎, 川邊良平, 池田思朗

    日本天文学会年会講演予稿集   Vol. 2021   2021

  26. 東京大学アタカマ天文台TAO6.5m望遠鏡用蒸着装置の性能評価

    高橋英則, 吉井譲, 吉井譲, 土居守, 河野孝太郎, 宮田隆志, 田中培生, 峰崎岳夫, 酒向重行, 田辺俊彦, 諸隈智貴, 廿日出文洋, 小西真広, 江草芙実, 上塚貴史, 大澤亮, 鮫島寛明, 浅野健太朗, 西村淳, 加藤夏子, 沼田瑞樹, 青木勉, 征矢野隆夫, 樽沢賢一, 本原顕太郎, 本原顕太郎, 田村陽一

    日本天文学会年会講演予稿集   Vol. 2021   2021

  27. 大質量銀河団SPT-CL J0615-5746に属するCO分子輝線銀河が示す環境効果による星形成活動の抑制

    中野覚矢, 田村陽一, 谷口暁星, 萩本将都, 竹内努, BAKX T., 井上昭雄, 橋本拓也, 松尾宏, 梅畑豪紀, SALMON B., COE D., BRADLEY L., OESCH P., STRAIT V., BRADAC M.

    日本天文学会年会講演予稿集   Vol. 2021   2021

  28. Large Submillimeter Telescope (LST): 7

    田村陽一, 河野孝太郎, 川邊良平, 石井峻, 大島泰, 朝木義晴, 竹腰達哉

    日本天文学会年会講演予稿集   Vol. 2021   2021

  29. Large Submillimeter Telescope (LST): 6

    河野孝太郎, 田村陽一, 竹腰達哉, 遠藤光, 川邊良平, 大島泰

    日本天文学会年会講演予稿集   Vol. 2021   2021

  30. 大口径望遠鏡による広域マッピング観測:LMT50m望遠鏡搭載2mm帯受信機によるOrion A領域の電波再結合線観測結果及びLST将来サイエンス

    吉村勇紀, 川邊良平, 米津鉄平, 前澤裕之, 酒井剛, 田中邦彦, 竹腰達哉, 廿日出文洋, 河野孝太郎, 谷口暁星, 田村陽一, 大島泰, 島尻芳人, HUGHES David, SANCHEZ David, GOMEZ Arturo, RODRIGUEZ Victor, COLIN Edgar, ZARAGOZA Javier, CHAVEZ Miguel, SCHLOERB Pete, SOUCCAR Kamal, YUN Min

    日本天文学会年会講演予稿集   Vol. 2021   2021

  31. 原始銀河団領域SSA22におけるJVLA5cm電波連続光観測:I.ソースカタログの作成

    松田慧一, 梅畑豪紀, 田村陽一, 谷口暁星, BAKX T., 河野孝太郎, 中西康一郎, 但木謙一, RUJOPAKARN W., IVISON R., AO Y., YUN M. S.

    日本天文学会年会講演予稿集   Vol. 2021   2021

  32. サブミリ波超解像イメージングで空間分解した活動銀河NGC1068の中心核構造

    戸上陽平, 田村陽一, 谷口暁星, 竹内努, COORAY Suchetha, 河野海, 中里剛, 池田思朗

    日本天文学会年会講演予稿集   Vol. 2021   2021

  33. TMT科学運用の検討

    青木和光, 岩田生, 臼田知史, 小山佑世, 冨永望, 古澤久徳, 安井千香子, 秋山正幸, 田村陽一, 成田憲保, 藤井通子

    日本天文学会年会講演予稿集   Vol. 2021   2021

  34. TAO6.5m望遠鏡用近赤外線観測装置SWIMS:すばる望遠鏡での初期観測運用報告

    本原顕太郎, 本原顕太郎, 小西真広, 高橋英則, 小山舜平, 加藤夏子, 櫛引洸佑, 中村洋貴, 陳諾, 穂満星冴, 吉井讓, 吉井讓, 土居守, 河野孝太郎, 宮田隆志, 田中培生, 峰崎岳夫, 田辺俊彦, 酒向重行, 諸隈智貴, 廿日出文洋, 上塚貴史, 青木勉, 征矢野隆夫, 樽沢賢一, 大澤亮, 鮫島寛明, 浅野健太朗, 西村淳, 橘健吾, 道藤翼, 飯田熙一, 田村陽一, 沖田博文, 越田進太郎, 半田利弘

    日本天文学会年会講演予稿集   Vol. 2021   2021

  35. HI Tomograpic survey in the SSA22 field (SSASS-HIT) (II): tomographic map at 2.7<z<3.55

    馬渡健, 井上昭雄, 山田亨, 大塚拓也, 林野友紀, 山中郷史, 菅原悠馬, LEE Khee-Gan, TEJOS Nicolas, SCHLEGEL David, PROCHASKA Xavier, 柏川伸成, 松田有一, 岩田生, HENNAWEI Josep, 梅畑豪紀, 田村陽一, 向江志郎, 大内正巳

    日本天文学会年会講演予稿集   Vol. 2021   2021

  36. ngVLAによる遠方銀河の遠赤外線微細構造輝線の観測可能性

    橋本拓也, 井上昭雄, 田村陽一, 松尾宏, 伊王野大介, 久野成夫

    日本天文学会年会講演予稿集   Vol. 2021   2021

  37. LMT50m鏡搭載2mm帯受信機B4Rを用いたOrion-KL領域マッピング観測による分子の存在量比の観測結果報告

    米津鉄平, 前澤裕之, 川邊良平, 吉村勇紀, 廿日出文洋, 河野孝太郎, 竹腰達哉, 酒井剛, 田中邦彦, 谷口暁星, 田村陽一, 大島泰, 島尻芳人, HUGHES David, SANCHEZ-ARGUELLES David, GOMEZ-RUIZ Arturo, RODRIGUEZ-MONTOYA Ivan, ZARAGOZA-CARDIEL Javier, COLIN Edgar, CHAVEZ-DAGOSTINO Miguel, ROJAS Sergio, SCHLOERB Peter, SOUCCAR Kamal, YUN Min

    日本天文学会年会講演予稿集   Vol. 2021   2021

  38. LMT50m鏡に搭載した2mm帯受信機B4Rによるオリオン分子雲(OMC-1)の高感度分子輝線マッピング観測:デモ科学観測の概要と輝線同定

    川邊良平, 吉村勇紀, 竹腰達哉, 廿日出文洋, 河野孝太郎, 酒井剛, 田中邦彦, 谷口暁星, 田村陽一, 大島泰, 島尻芳人, 前澤裕之, 米津鉄平, HUGHES David, SANCHEZ-ARGUELLES David, GOMEZ-RUIZ Arturo, RODRIGUEZ-MONTOYA Ivan, ZARAGOZA-CARDIEL Javier, COLIN Edgar, CHAVEZ-DAGOSTINO Miguel, SCHLOERB Pete, SOUCCAR Kamal, YUN Min

    日本天文学会年会講演予稿集   Vol. 2020   2020

  39. 大型ミリ波望遠鏡LMT50mに搭載した新型2mm帯受信機B4Rによる系内星形成領域の高感度分子輝線観測

    吉村勇紀, 川邊良平, 酒井剛, 田中邦彦, 竹腰達哉, 廿日出文洋, 河野孝太郎, 谷口暁星, 田村陽一, 大島泰, HUGHES David, SANCHEZ David, GOMEZ Arturo, RODRIGUEZ Victor, COLIN Edgar, ZARAGOZA Javier, CHAVEZ Miguel, SCHLOERB Pete, SOUCCAR Kamal, YUN Min

    日本天文学会年会講演予稿集   Vol. 2020   2020

  40. Large Submillimeter Telescope (LST): 5

    河野孝太郎, 廿日出文洋, 竹腰達哉, 江草芙実, 田村陽一, 谷口暁星, 井上昭雄, 川邊良平, 大島泰, 石井峻, 遠藤光, 唐津謙一, 梅畑豪紀, 濤崎智佳

    日本天文学会年会講演予稿集   Vol. 2020   2020

  41. 単一鏡観測装置開発のための共通データ解析ソフトウェアの開発

    谷口暁星, 田村陽一, 立原研悟, 鈴木向陽, 塩谷一樹, 竹腰達哉, 石田剛, 吉村勇紀, 新田冬夢, MANDAL Pranshu, 村山洋佑, 大島泰, 永井誠, 川邊良平

    日本天文学会年会講演予稿集   Vol. 2020   2020

  42. 北半球最高感度ミリ波サブミリ波ヘテロダイン受信システムLMT-FINER I.デジタルサイドバンド分離広帯域分光計ファームウェアの開発

    田村陽一, 萩本将都, 谷口暁星, 山本宏昭, 川邉良平, 鎌崎剛, 小嶋崇文, 酒井剛, 原田健一, 谷口達, 小関研介, 田中邦彦, 廿日出文洋, 竹腰達哉, 河野孝太郎, 吉村勇紀, 井上昭雄, 橋本拓也

    日本天文学会年会講演予稿集   Vol. 2020   2020

  43. ミリ波補償光学の開発 IV.波面センサ用送信機サブシステムの開発と評価

    深作悠平, 久野成夫, 田村陽一, 木村公洋, 谷口暁星, 上田哲太朗, 川邉良平, 川口則幸, 南谷哲宏, 大島泰, 岡田望, 小川英夫, 大西利和, 栗田光樹夫, 河野孝太郎, 竹腰達哉

    日本天文学会年会講演予稿集   Vol. 2020   2020

  44. ミリ波補償光学の開発 III.開口面干渉型波面センサの概要

    田村陽一, 木村公洋, 谷口暁星, 上田哲太朗, 川邉良平, 川口則幸, 南谷哲宏, 大島泰, 深作悠平, 久野成夫, 岡田望, 小川英夫, 大西利和, 栗田光樹夫, 河野孝太郎, 竹腰達哉

    日本天文学会年会講演予稿集   Vol. 2020   2020

  45. スパースモデリングを使ったサブミリ波分光観測の高感度化

    谷口暁星, 田村陽一, 萩本将都, 戸上陽平, 池田思朗, 竹腰達哉, 吉村勇紀, 川邊良平

    日本天文学会年会講演予稿集   Vol. 2020   2020

  46. LMT50m鏡用2ミリ受信機システムの開発と爆発的星形成銀河,巨大ブラックホールの研究 V:科学評価試験

    川邊良平, 酒井剛, 田中邦彦, 吉村勇紀, 竹腰達哉, 廿日出文洋, 河野孝太郎, 谷口暁星, 田村陽一, 大島泰, HUGHES David, SANCHEZ-ARGUELLES David, GOMEZ-RUIZ Arturo, RODRIGUEZ-MONTOYA Ivan, ZARAGOZA-CARDIEL Javier, COLIN Edgar, CHAVEZ-DAGOSTINO Miguel, SCHLOERB Pete, SOUCCAR Kamal, YUN Min

    日本天文学会年会講演予稿集   Vol. 2020   2020

  47. Importance of Dust in the Evolution of Galaxies: Prospect for SPICA

    竹内努, 泉拓磨, 今西昌俊, 久保真理子, 播金優一, 馬場俊介, 山下拓時, 田村陽一, 梅畑豪紀, 鳥羽儀樹, 長峯健太郎, 橋本拓也, 市川幸平, 和田武彦

    日本天文学会年会講演予稿集   Vol. 2020   2020

  48. Large Submillimeter Telescope (LST): 4)Recent Progress

    川邊良平, 大島泰, 河野孝太郎, 田村陽一

    日本天文学会年会講演予稿集   Vol. 2019   2019

  49. LMT 50m鏡用2ミリ受信機システムの開発と爆発的星形成銀河,巨大ブラックホールの研究 IV 搭載試験観測

    酒井剛, 川邊良平, 大島泰, 谷口暁星, 上田哲太朗, 田村陽一, 田中邦彦, 吉村勇紀, 廿日出文洋, 河野孝太郎, HUGHES David, GALE David, SANCHEZ David, GOMEZ-RUIZ Arturo, COLIN Edgar

    日本天文学会年会講演予稿集   Vol. 2019   2019

  50. ALMA Reveals an Extremely Compact Submillimeter Galaxy in the Early Universe

    小山紗桜, 伊王野大介, 但木謙一, 泉拓磨, 川邊良平, 松田有一, 中西康一郎, 植田準子, 道山知成, 安藤未彩希, YUN M.S., WILSON G. W., ARETXAGA I., HUGHES D., 廿日出文洋, 河野孝太郎, 五十嵐創, 李民主, 田村陽一, 斉藤俊貴, 梅畑豪紀

    日本天文学会年会講演予稿集   Vol. 2019   2019

  51. TAO 6.5m望遠鏡用近赤外線観測装置SWIMS:すばる望遠鏡での試験観測報告

    小西真広, 本原顕太郎, 高橋英則, 加藤夏子, 寺尾恭範, 櫛引洸佑, 中村洋貴, 吉井讓, 吉井讓, 土居守, 河野孝太郎, 田中培生, 宮田隆志, 田中培生, 峰崎岳夫, 田辺俊彦, 酒向重行, 諸隈智貴, 廿日出文洋, 青木勉, 征矢野隆夫, 樽沢賢一, 大澤亮, 上塚貴史, 鮫島寛明, 浅野健太朗, 森智宏, 橘健吾, 田村陽一, 越田進太郎, 半田利弘

    日本天文学会年会講演予稿集   Vol. 2019   2019

  52. TAO 6.5m望遠鏡用中間赤外線観測装置MIMIZUKU:すばる望遠鏡における第二回試験観測

    上塚貴史, 宮田隆志, 酒向重行, 大澤亮, 浅野健太朗, 内山允史, 森智宏, 吉田泰, 橘健吾, 左近樹, 尾中敬, 尾中敬, 片ざ宏一, 吉井讓, 吉井讓, 土居守, 河野孝太郎, 峰崎岳夫, 本原顕太郎, 田辺俊彦, 諸隈智貴, 廿日出文洋, 小西真広, 高橋英則, 青木勉, 征矢野隆夫, 樽沢賢一, 鮫島寛明, 加藤夏子, 寺尾恭範, 櫛引洸佑, 中村洋貴, 田村陽一, 越田進太郎, 半田利弘

    日本天文学会年会講演予稿集   Vol. 2019   2019

  53. DESHIMA:DE:CODEによるDESHIMA性能評価

    鈴木向陽, 田村陽一, 上田哲太朗, 遠藤光, THOEN David, VAN MARREWIJK Nuri, YURDUSEVEN Ozan, BOSMA Sjoerd, LLOMBART Nuria, 谷口暁星, 石田剛, 竹腰達哉, 河野孝太郎, 陳家偉, 石井峻, 大島泰, 前川淳, 川邊良平, 成瀬雅人, BAKX Tom, 唐津謙一, MURUGESAN Vignesh, BUENO Juan, YATES Stephen, BASELMANS Jochem, VAN DER WERF Paul

    日本天文学会年会講演予稿集   Vol. 2018   2018

  54. ミリ波補償光学の開発 II.波面センサ用GPU相関器

    上田哲太朗, 田村陽一, 島田優也, 川邊良平, 斎藤正雄, 南谷哲宏, 大島泰, 小川英夫, 大西利和, 木村公洋, 岡田望, 橋下育実, 栗田光樹夫, 河野孝太郎, 竹腰達哉, 谷口暁星

    日本天文学会年会講演予稿集   Vol. 2018   2018

  55. ミリ波補償光学の開発 I.プロジェクトの概要

    田村陽一, 上田哲太朗, 島田優也, 川邊良平, 齋藤正雄, 南谷哲宏, 大島泰, 小川英夫, 大西利和, 木村公洋, 岡田望, 橋本育実, 栗田光樹夫, 河野孝太郎, 竹腰達哉, 谷口暁星

    日本天文学会年会講演予稿集   Vol. 2018   2018

  56. LMT50m鏡用2ミリ受信機システムの開発と爆発的星形成銀河,巨大ブラックホールの研究 III 搭載計画

    川邊良平, 酒井剛, 田中邦彦, 廿日出文洋, 河野孝太郎, 田村陽一, 大島泰, 野口卓, 高橋敏一

    日本天文学会年会講演予稿集   Vol. 2018   2018

  57. DESHIMA:解析ソフトウェアの雑音除去アルゴリズムのシミュレーションを用いた評価

    陳家偉, 石井峻, 大島泰, 前川淳, 川邊良平, 鈴木向陽, 田村陽一, 上田哲太朗, 遠藤光, 谷口暁星, 石田剛, 竹腰達哉, 河野孝太郎, 唐津謙一

    日本天文学会年会講演予稿集   Vol. 2018   2018

  58. DESHIMA:新技術「超伝導オンチップ・フィルターバンク」による初の天体スペクトル検出

    遠藤光, THOEN David, YURDUSEVEN Ozan, BOSMA Sjoerd, LLOMBART Nuria, KLAPWIJK Teun, 唐津謙一, HUITING Robert, MURUGESAN Vignesh, YATES Stephen, BASELMANS Jochem, VAN DER WERF Paul, 石田剛, 谷口暁星, 竹腰達哉, 河野孝太郎, 大島泰, 石井峻, 陳家偉, 前川淳, 川邊良平, 木挽俊彦, 浅山信一郎, 鈴木向陽, 上田哲太朗, 田村陽一, 成瀬雅人, 藤田和之, 香内晃, 中坪俊一, BAKX Tom

    日本天文学会年会講演予稿集   Vol. 2018   2018

  59. DESHIMA:搭載試験の全観測データを対象とした詳細性能評価

    谷口暁星, 鈴木向陽, 田村陽一, 上田哲太朗, 遠藤光, THOEN David, BOSMA Sjoerd, LLOMBART Nuria, 石田剛, 竹腰達哉, 河野孝太郎, 塚越崇, 陳家偉, 石井峻, 大島泰, 前川淳, 川邊良平, 鈴木惇也, 成瀬雅人, BAKX Tom, 唐津謙一, MURUGESAN Vignesh, YATES Stephen, BASELMANS Jochem, VAN DER WERF Paul

    日本天文学会年会講演予稿集   Vol. 2018   2018

  60. TAO 6.5m望遠鏡用中間赤外線観測装置MIMIZUKUの開発進捗:Aquarius検出器の運用最適化とすばる望遠鏡でのファーストライト

    上塚貴史, 宮田隆志, 酒向重行, 大澤亮, 内山允史, 森智宏, 吉田泰, 尾中敬, 左近樹, 吉井讓, 吉井讓, 土居守, 河野孝太郎, 田中培生, 本原顕太郎, 田辺俊彦, 峰崎岳夫, 諸隈智貴, 廿日出文洋, 青木勉, 征矢野隆夫, 樽沢賢一, 加藤夏子, 高橋英則, 小西真広, 寺尾恭範, 河野志洋, 櫛引洸佑, 片ざ宏一, 田村陽一, 越田進太郎, 半田利弘

    日本天文学会年会講演予稿集   Vol. 2018   2018

  61. TAO 6.5m望遠鏡用近赤外線観測装置SWIMSの開発進捗:すばる望遠鏡でのファーストライト

    本原顕太郎, 小西真広, 高橋英則, 加藤夏子, 寺尾恭範, 河野志洋, 櫛引洸佑, 吉井讓, 吉井讓, 土居守, 河野孝太郎, 宮田隆志, 田中培生, 田辺俊彦, 峰崎岳夫, 酒向重行, 諸隈智貴, 廿日出文洋, 青木勉, 征矢野隆夫, 樽沢賢一, 上塚貴史, 大澤亮, 内山允史, 森智宏, 吉田泰, 田村陽一, 越田進太郎, 半田利弘

    日本天文学会年会講演予稿集   Vol. 2018   2018

  62. DESHIMA:超伝導オンチップ・フィルターバンクを用いたサブミリ波超広帯域分光器の研究開発

    遠藤光, 唐津謙一, THOEN David, VAN MARREWIJK Nuri, YURDUSEVEN Ozan, BOSMA Sjoerd, LLOMBART Nuria, MURUGESAN Vignesh, BUENO Juan, YATES Stephen, BASELMANS Jochem, VAN DER WERF Paul, 成瀬雅人, 富田望, 谷口暁星, 田村陽一, 河野孝太郎, 石井峻, 前川淳, 竹腰達哉, 川邊良平, 大島泰

    日本天文学会年会講演予稿集   Vol. 2017   2017

  63. 重力レンズ銀河団のALMAデータを用いたCO光度関数の制限

    山口裕貴, 河野孝太郎, 田村陽一, 大栗真宗, 泉拓磨, 北山哲, 江澤元, 大島泰, 松尾宏, 太田直美

    日本天文学会年会講演予稿集   Vol. 2017   2017

  64. LMT50m鏡用2mm受信機システムの開発と爆発的星形成銀河,巨大ブラックホールの研究 II:全体進捗

    川邊良平, 酒井剛, 田中邦彦, 田村陽一, 河野孝太郎, 大島泰, 野口卓, 高橋敏一, 廿日出文洋

    日本天文学会年会講演予稿集   Vol. 2017   2017

  65. LMT50m鏡用2mm受信機システムと爆発的星形成銀河,巨大ブラックホールの研究 III:開発進捗

    酒井剛, 川邊良平, 田中邦彦, 田村陽一, 河野孝太郎, 大島泰, 廿日出文洋, 野口卓, 高橋敏一

    日本天文学会年会講演予稿集   Vol. 2017   2017

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Presentations 62

  1. Multi-phase interstellar medium in the early galaxies probed by FIR fine-structure lines Invited

    田村陽一

    遠赤外線微細構造線勉強会  2024.9.5 

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    Event date: 2024.9

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

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  2. The Large Submillimeter Telescope Invited

    Yoichi Tamura

    Kavli-IAU Workshop on Global Coordination "Far-infrared to Millimeter Wavelengths: Future Facilities and their Synergies"  2024.3.26 

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    Event date: 2024.3

    Language:English   Presentation type:Oral presentation (invited, special)  

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  3. The Large Submillimeter Telescope Invited

    Yoichi Tamura

    2024.3.4 

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    Event date: 2024.3

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

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  4. 大口径ミリ波サブミリ波アンテナ

    田村陽一

    天文学ワークショップ2023@北杜市  2023.8.16 

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    Event date: 2023.8

    Language:Japanese   Presentation type:Oral presentation (general)  

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  5. A Rapid Redshift Survey and Multi-line Spectroscopy of Dust Obscured Quasars and Galaxies at High Redshift

    Yoichi Tamura

    DESHIMA Collaboration Meeting  2023.7.17 

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    Event date: 2023.7

    Language:Japanese   Presentation type:Oral presentation (general)  

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  6. DESHIMA 2.0: A Rapid Redshift Survey and Multi-line Spectroscopy of Dust Obscured Quasars and Galaxies at High Redshift Invited

    Yoichi Tamura

    Mini Workshop on AGNs  2023.6.27 

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    Event date: 2023.6

    Language:English   Presentation type:Oral presentation (invited, special)  

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  7. Large Submillimeter Telescope: Synergy with ALMA2 and Beyond Invited

    Yoichi Tamura

    2023.3 

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    Event date: 2023.3

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

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  8. FINER: Far-Infrared Nebular Emission Receiver for LMT

    Yoichi Tamura

    ALMA/NRO/ASTE Users Meeting 2022  2022.12.20 

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    Event date: 2022.12

    Language:English   Presentation type:Poster presentation  

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  9. FINER: Far-Infrared Nebular Emission Receiver for LMT

    Yoichi Tamura

    A Half Century of Millimeter and Submillimeter Astronomy: Impact on Astronomy/Astrophysics and the Future  2022.12.15 

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    Event date: 2022.12

    Language:English   Presentation type:Poster presentation  

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  10. 北半球最高感度ミリ波サブミリ波ヘテロダイン受信システム LMT-FINER III. 遠赤外線微細構造線による前・宇宙再電離期の銀河形成の開拓

    田村陽一, 萩本将都, 谷口暁星, 酒井剛, 小嶋崇文, 川邊良平, 河野孝太郎, 廿日出文洋, 吉村勇紀, 田中邦彦, 井上昭雄, 橋本拓也, 竹腰達哉, 他 FINER チーム

    日本天文学会2022年秋季年会  2022.9.15 

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    Event date: 2022.9

    Language:Japanese   Presentation type:Oral presentation (general)  

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  11. Large Submillimeter Telescope

    Yoichi Tamura

    Seminar at Sardinia Radio Telescope  2022.9.9 

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    Event date: 2022.9

    Language:English   Presentation type:Public lecture, seminar, tutorial, course, or other speech  

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  12. Millimeter-wave Adaptive Optics

    Yoichi Tamura

    Lorentz Center Workshop: Mapping the Invisible Universe  2022.8.29 

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    Event date: 2022.8 - 2022.9

    Language:English   Presentation type:Oral presentation (general)  

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  13. 次世代大型サブミリ波望遠鏡の限界性能への挑戦

    田村陽一

    JST創発的研究支援事業「創発の場」  2022.3.31 

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    Event date: 2022.3

    Language:Japanese   Presentation type:Oral presentation (general)  

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  14. The Large Submillimeter Telescope and Millimetric Adaptive Optics Invited

    Yoichi Tamura

    NAOJ ATC Seminar  2022.3.14 

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    Event date: 2022.3

    Language:English   Presentation type:Public lecture, seminar, tutorial, course, or other speech  

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  15. The Large Submillimeter Telescope (LST) Invited

    Yoichi Tamura

    2022.3.8 

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    Event date: 2022.3

    Language:English   Presentation type:Oral presentation (invited, special)  

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  16. ALMA imaging of a z = 8.31 Lyman break galaxy at a 300 pc resolution

    Yoichi Tamura

    Astronomical Society of Japan Annual Meeting  2022.3.2  Astronomical Society of Japan

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    Event date: 2022.3

    Language:English   Presentation type:Oral presentation (general)  

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  17. DESHIMA 2.0: Submillimeter-wave spectroscopic survey for dust-obscured galaxies hosting a supermassive black hole Invited

    Yoichi Tamura

    2021.12.28 

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    Event date: 2021.12

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

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  18. The Large Submillimeter Telescope (LST) Invited

    Yoichi Tamura, Kotaro Kohno, Ryohei Kawabe

    East Asia Submillimeter-wave Workshop 2021  2021.11.26 

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    Event date: 2021.11

    Language:English   Presentation type:Oral presentation (invited, special)  

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  19. Millimeter-wave adaptive optics for future large-aperture submillimeter telescopes

    Yoichi Tamura

    NAOJ NRO Colloquium  2021.11.2 

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    Event date: 2021.11

    Language:English   Presentation type:Public lecture, seminar, tutorial, course, or other speech  

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  20. 次世代大口径サブミリ波望遠鏡 Large Submillimeter Telescope (LST) ってなに? Invited

    田村陽一

    電波天文・干渉計サマースクール 2021  2021.9.17  国立天文台

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    Event date: 2021.9

    Language:Japanese   Presentation type:Public lecture, seminar, tutorial, course, or other speech  

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  21. Large Submillimeter Telescope (LST): 7. Telescope Specifications

    Yoichi Tamura

    2021.9.13 

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    Event date: 2021.9

    Language:Japanese   Presentation type:Oral presentation (general)  

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  22. Millimeter-wave Adaptive Optics for Future Large Submillimeter Telescopes Invited International conference

    Yoichi Tamura

    Joint ALMA Observatory APG Advanced Technical Talk  2021.6.9  Joint ALMA Observatory

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    Event date: 2021.6

    Language:English   Presentation type:Oral presentation (invited, special)  

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  23. サブミリ波単一鏡の革新 Invited

    田村陽一

    サブミリ波単一鏡の革新で挑む,天文学の未解決問題  2021.3.31 

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    Event date: 2021.3

    Language:Japanese   Presentation type:Symposium, workshop panel (nominated)  

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  24. Development of Millimetric Adaptive Optics V. On-site demonstration of a wavefront sensor with aperture plane interferometry at the Nobeyama 45 m telescope

    Yoichi Tamura

    Astronomical Society of Japan  2021.3  Astronomical Society of Japan

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    Event date: 2021.3

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

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  25. Millimetric Adaptive Optics: Current Status International conference

    Yoichi Tamura

    ALMA/45m/ASTE Users Meeting 2020  2021.1 

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    Event date: 2021.1

    Language:English   Presentation type:Poster presentation  

    Country:Japan  

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  26. Did you know the next generation Large Submillimeter Telescope (LST)? Invited

    Yoichi Tamura

    JCMT Workshop "Let's try using the James Clark Maxwell Telescope"  2021.1 

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    Event date: 2021.1

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

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  27. Wavefront sensor for millimeter/ submillimeter-wave adaptive optics based on aperture-plane interferometry International conference

    Yoichi Tamura

    SPIE Astronomical Telescopes + Instumentation  2020.12  SPIE

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    Event date: 2020.12

    Language:English   Presentation type:Oral presentation (general)  

    Venue:San Diego   Country:United States  

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  28. Large Submillimeter Telescope Invited

    Yoichi Tamura

    -  2020.12 

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    Event date: 2020.12

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

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  29. The most sensitive (sub)millimeter heterodyne receiver in the northern hemisphere LMT-FINER I. Development of firmware for a digital sideband separating spectrometer

    Yoichi Tamura

    Astronomical Society of Japan  2020.9  Astronomical Society of Japan

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    Event date: 2020.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

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  30. Millimetric Adaptive Optics: Current Status

    Yoichi Tamura

    Nobeyama Science Workshop  2020.9 

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    Event date: 2020.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

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  31. ミリ波補償光学の開発 III. 開口面干渉型 波面センサの概要

    Yoichi Tamura

    Astronomical Society of Japan Annual Meeting  2020.3 

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    Event date: 2020.3

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

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  32. Metal Enrichment and Multiphase Interstellar Media in a Galaxy at Redshift 8.3 Invited International conference

    Yoichi Tamura

    East-Asian ALMA Science Workshop  2020.2 

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    Event date: 2020.2

    Language:English   Presentation type:Oral presentation (invited, special)  

    Venue:Taipei   Country:Taiwan, Province of China  

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  33. ALMA Reveals the Cosmic Dawn Invited

    Yoichi Tamura

    Colloquium at Department of Physics Ochanomizu University  2020.1 

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    Event date: 2020.1

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

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  34. Cosmic Dawn and Birth of Galaxies Unveiled by Submillimeter-wave Observations Invited

    Yoichi Tamura

    Advanced Science Lecture at Kagoshima University  2020.1 

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    Event date: 2020.1

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

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  35. Cosmic Star-formation History Revealed by a Submillimeter Wideband Spectrometer DESHIMA Invited

    Yoichi Tamura

    The Japan Society of Applied Physics Quantum Electronics Workshop  2019.11 

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    Event date: 2019.11

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

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  36. Development of DESHIMA 2.0: Upgrade design overview

    Yoichi Tamura

    Astronomical Society of Japan Annual Meeting  2019.9 

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    Event date: 2019.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

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  37. LMT-FINEST: Far-Infrared Nebular Emission Study with the Large Millimeter Telescope International conference

    Yoichi Tamura

    Seminar at INAOE  2019.8  INAOE

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    Event date: 2019.8

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Puebla   Country:Mexico  

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  38. The Rapid Rise of Metal/Dust Enrichment Revealed by Submillimeter Observations of Far-Infrared Fine Structure Line and Dust Emission International conference

    Yoichi Tamura

    Exploring the Infrared Universe: The Promise of SPICA  2019.5 

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    Event date: 2019.5

    Language:English   Presentation type:Poster presentation  

    Venue:Crete  

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  39. ALMA Reveals Early Metal Enrichment in the Epoch of Reinization Invited

    Yoichi Tamura

    2019 SKA Workshop on Galaxy Evolution and Distant Universe  2019.3 

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    Event date: 2019.3

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

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  40. Far-Infrared Nebular Emission Receiver Invited

    Yoichi Tamura

    Power of Wideband Receiver: Exploring Sciences at 7mm Wavelength with Large Single Dish Telescopes  2019.3 

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    Event date: 2019.3

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

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  41. Early dust enrichment in a Y-dropout galaxy at z = 8.312 revealed by ALMA observations of the far-infrared [OIII] and dust emission

    Yoichi Tamura

    Astronomical Society of Japan Annual Meeting  2019.3 

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    Event date: 2019.3

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

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  42. High-z Cosmology via CO/[CII]/[OIII] Tomography with the Large Submillimeter Telescope Invited International conference

    Yoichi Tamura

    International Workshop on Submillimeter Astronomy  2019.2 

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    Event date: 2019.2

    Language:English   Presentation type:Oral presentation (invited, special)  

    Venue:Nanjing  

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  43. Millimetric Adaptive Optics: The Concept and Current Activities Invited International conference

    Yoichi Tamura

    International Workshop on Submillimeter Astronomy  2019.2 

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    Event date: 2019.2

    Language:English   Presentation type:Oral presentation (invited, special)  

    Venue:Nanjing  

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  44. CO/[CII] Tomography with the Large Submillimeter Telescope and Millimetric Adaptive Optics Invited International conference

    Yoichi Tamura

    ASIAA Special Seminar  2018.12 

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    Event date: 2018.12

    Language:English   Presentation type:Oral presentation (invited, special)  

    Venue:Taipei  

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  45. DESHIMA: The First Light Mission Invited International conference

    Yoichi Tamura

    ALMA/NRO45m/ASTE Users Meeting 2018  2018.12 

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    Event date: 2018.12

    Language:English   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

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  46. DESHIMA: A Project Summary International conference

    Yoichi Tamura

    ALMA/NRO45m/ASTE Users Meeting 2018  2018.12 

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    Event date: 2018.12

    Language:English   Presentation type:Poster presentation  

    Country:Japan  

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  47. ALMA Detections of the Far-infrared [O III] and Dust Emission in a Galaxy at z = 8.312: Early Metal Enrichment in the Heart of the Reionization Era International conference

    Yoichi Tamura

    International Astronomical Union Symposium No. 341: PanModel 2018—Challenges in Panchromatic Galaxy Modelling with Next Generation Facilities  2018.11 

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    Event date: 2018.11

    Language:English   Presentation type:Oral presentation (general)  

    Country:Japan  

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  48. ALMA Reveals the Early Dust Enrichment in a Galaxy in the Reionization Era Invited International conference

    Yoichi Tamura

    Latin America–Japan Academic Forum 2018  2018.9 

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    Event date: 2018.9

    Language:English   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

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  49. CO/[CII] Tomography with the Large Submillimeter Telescope International conference

    Yoichi Tamura

    Atacama Large Aperture Submillimeter Telescope (AtLAST) Workshop 2018  2018.9 

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    Event date: 2018.9

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Edinburgh  

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  50. ALMA Reveals the Early Dust Enrichment in a Galaxy in the Reionization Era Invited

    Yoichi Tamura

    The 1546th Colloquium at Department of Astronomy  2018.9 

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    Event date: 2018.9

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

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  51. ALMA reveals the early dust enrichment in a z = 8.3 galaxy

    Yoichi Tamura

    Galaxy-IGM Workshop 2018  2018.8 

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    Event date: 2018.8

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

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  52. Development of Millimetric Adaptive Optics Invited

    Yoichi Tamura

    -  2018.3 

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    Event date: 2018.3

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

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  53. Development of Millimetric Adaptive Optics I. Project Overview

    Yoichi Tamura

    Astronomical Society of Japan Annual Meeting  2018.3 

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    Event date: 2018.3

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

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  54. ALMA Reveals Early Metal Enrichment in a Lyman Break Galaxy at z = 8

    Yoichi Tamura

    ALMA/NRO45m/ASTE Users Meeting 2017  2017.12 

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    Event date: 2017.12

    Language:English   Presentation type:Poster presentation  

    Country:Japan  

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  55. Complex Geometry of ISM in High-z Galaxies Revealed by Long Baseline ALMA Invited International conference

    Yoichi Tamura

    ALMA Long Baseline Workshop  2017.10 

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    Event date: 2017.10

    Language:English   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

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  56. ALMA Detection of Dust Emission in a Lyman Break Galaxy at Redshift z ≈ 8.4

    Yoichi Tamura

    Astronomical Society of Japan Annual Meeting  2017.9 

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    Event date: 2017.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

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  57. Galaxy formation and evolution revealed by submillimeter observations Invited

    Yoichi Tamura

    -  2017.9 

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    Event date: 2017.9

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

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  58. Millimetric Adaptive Optics: Development of Microwave Wavefront Sensor

    Yoichi Tamura

    Nobeyama/ASTE Single Dish Science Workshop  2017.8 

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    Event date: 2017.8

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

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  59. The 300 pc ALMA imaging of a z = 8.31 galaxy

    田村陽一

    銀河-銀河間物質ワークショップ  2023.8.1 

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  60. Synergies with far-infrared space missions and the Large Submillimeter Telescope Invited

    Yoichi Tamura

    2024.2.19 

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  61. DESHIMA 2.0/ASTE: Commissioning Campaign in 2023 Invited

    田村陽一

    ALMA/Nobeyama/ASTE Users Meeting  2023.12.21 

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  62. ALMA3として何を考えるか

    田村陽一

    次世代のサブミリ波観測とシミュレーションの計画検討会  2024.2.5 

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Research Project for Joint Research, Competitive Funding, etc. 5

  1. Development of a 5-element aperture-plane interferometer wavefront sensor for millimetric adaptive optics

    Grant number:NAOJ-RCC-2201-0102  2022.4 - 2023.3

    Yoichi Tamura, Kawabe Ryohei

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    Authorship:Principal investigator 

  2. A high-sensitivity millimeter/submillimeter heterodyne receiver LMT-FINER II: Development of a digital sideband separating spectrometer

    2020.4 - 2021.3

    Joint Research and Development 

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    Authorship:Principal investigator 

    Grant amount:\3840000 ( Direct Cost: \3840000 )

  3. A high-sensitivity millimeter/submillimeter heterodyne receiver LMT-FINER: Development of a digital sideband separating spectrometer

    2019.4 - 2020.3

    NAOJ Joint Development Research 

    Yoichi Tamura, Ryohei Kawabe

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    Authorship:Principal investigator  Grant type:Competitive

    Grant amount:\4960000 ( Direct Cost: \4960000 )

  4. Development of Millimetric Adaptive Optics

    2018.4 - 2023.3

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    Grant type:Competitive

  5. Development of Millimetric Adaptive Optics: Development of Wavefront Sensor

    2017.4 - 2018.3

    NAOJ Joint Development Research 

    Yoichi Tamura, Ryohei Kawabe

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    Authorship:Principal investigator 

    Grant amount:\4000000 ( Direct Cost: \4000000 )

KAKENHI (Grants-in-Aid for Scientific Research) 14

  1. サブミリ波フラッシュが届ける突発現象の観測的研究

    Grant number:24H01808  2024.4 - 2026.3

    科学研究費助成事業  学術変革領域研究(A)

    田村 陽一

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    Authorship:Principal investigator 

    Grant amount:\7410000 ( Direct Cost: \5700000 、 Indirect Cost:\1710000 )

  2. Formation Processes of Heavy Elements in the Early Universe Elucidated by Superconducting Nanoelectronics, Large-Scale Numerical Simulations, and Data Science

    Grant number:23K20035  2023.11 - 2030.3

    Grants-in-Aid for Scientific Research  Fund for the Promotion of Joint International Research (International Leading Research )

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    Authorship:Coinvestigator(s) 

  3. Galaxy Formation in the Pre-Reionization Era Explored by Far-Infrared Nebular Emission Lines

    Grant number:22H04939  2022.4 - 2027.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (S)  Grant-in-Aid for Scientific Research (S)

    Yoichi Tamura, Akio K. Inoue, Takeshi Sakai, Takafumi Kojima, Kotaro Kohno, Kunihiko Tanaka

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    Authorship:Principal investigator 

    Grant amount:\198250000 ( Direct Cost: \152500000 、 Indirect Cost:\45750000 )

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  4. Development of Millimetric Adaptive Optics

    Grant number:20K20287  2017.6 - 2022.4

    Grant-in-Aid for Challenging Research (Pioneering)

    Yoichi Tamura

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    Authorship:Principal investigator  Grant type:Competitive

    Grant amount:\25610000 ( Direct Cost: \19700000 、 Indirect Cost:\5910000 )

  5. Study of cosmic star formation history based on an unbiased survey of mm/submm-wave emission line galaxies

    Grant number:17H06130  2017.5 - 2022.3

    Grant-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (S)

    Kotaro Kohno

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    Authorship:Coinvestigator(s)  Grant type:Competitive

    Grant amount:\45110000 ( Direct Cost: \34700000 、 Indirect Cost:\10410000 )

  6. Exploration of the pre-reionization era with spectroscopy of the far-infrared oxygen emission line

    Grant number:22H00150  2022.4 - 2027.3

    Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (A)

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    Authorship:Principal investigator 

    Grant amount:\43680000 ( Direct Cost: \33600000 、 Indirect Cost:\10080000 )

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  7. Ultimate performance of the next generation large-aperture submillimeter telescopes

    2022 - 2028

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    Authorship:Principal investigator 

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  8. スパースモデリングによるALMA望遠鏡イメージングの新展開

    Grant number:20H01951  2020.4 - 2024.3

    日本学術振興会  科学研究費助成事業  基盤研究(B)

    池田 思朗, 田村 陽一, 本間 希樹, 小杉 城治

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    Authorship:Coinvestigator(s)  Grant type:Competitive

    Grant amount:\1300000 ( Direct Cost: \1000000 、 Indirect Cost:\300000 )

    2019年4月に発表された超巨大ブラックホールシャドウの撮像では,本研究の代表者も参加して構築したスパースモデリングによる新たな電波干渉計イメージング法が用いられた.本研究ではこの方法を高性能な電波干渉計であるALMAのデータに適用するため,ソフトウェア環境を構築する.そのため,アルゴリズムの高速化し,偏波イメージング多バンドの同時イメージングを実装する.本研究ではデータ科学者と天文学者が共同で新たな手法を開発する.代表者がアルゴリズムを提案,実装し,分担者が天文データを用いた検証を行う.最終的にALMA のイメージングの標準であるCASAと親和性の高いソフトウェアとして配布する.
    国際プロジェクト、イベント・ホライゾン・テレスコープ(EHT)は2019年4月、2022年5月にそれぞれM87楕円銀河と天の川銀河の中心にある巨大ブラックホールシャドウを撮影した。EHTは地球規模の巨大な電波干渉計であり、この撮像のために日本チームが中心となってスパースモデリングを用いた新たなイメージング法を開発した。スパースモデリングによる方法は新たな電波干渉計イメージング法として期待されている。本研究ではスパースモデリングに基づくイメージング法をチリにある高性能電波干渉計であるALMA望遠鏡で用いるため、専用のソフトウェア環境を構築することが目的である。ALMAはEHTに比べて計算量が多いが、EHTに比べて雑音が少ないため、シンプルなアルゴリズムでも十分に良い画像が得られる。初年度は,イメージングの最も大事な撮像アルゴリズムの部分を高速化した。電波干渉計のイメージング法ではこれまで長年CLEAN法が用いられてきた。2021年度はソフトウェアのプロトタイプを公開し、CLEAN法と比較して本手法の結果が良いのかという点を天文学者との共同研究を通じて検証した。その結果、既存の方法を改善するものとなりうることを確認している。
    <BR>
    電波干渉計では、望遠鏡ごとに感度が変化し、光路長の変化によって位相も変化する。これらはまとめてゲインと呼ばれ、望遠鏡ごとに時事刻々と変化するゲインを適切に調整しなければ正しい画像は得られない。ゲインの調整はセルフ・キャリブレーションと呼ばれる。2021年度は本研究の一環としてセルフ・キャリブレーションの新たなアルゴリズムを開発した。新たなアルゴリズムは十分高速に動作するため、このアルゴリズムを実装し、検証を行った。動作は期待通りであり。この結果については現在、論文を執筆中である。他にも共同研究を通じた論文の執筆を行なっている。
    初年度に開発したアルゴリズムをプロトタイプのソフトウェアとして公開し、共同研究を通して検証した結果、実用上十分に使えることがわかった。このことからイメージングの最も大事な撮像アルゴリズムの部分は順調に動作していることがわかり、本研究課題の進捗は順調であると考える。また、セルフ・キャリブレーションのアルゴリズムも十分に高速に動作することを確認し、実際の干渉計のデータによって検証を行い、現在論文を執筆中である。以上より、おおむね順調に進展していると考える。
    新たな方法を普及させるには既存方法と同等以上の結果が得られることが求められる。新たな電波干渉計のイメージング法を提案するならば、これまで長年用いられてきたCLEAN法と同等以上となる必要がある。スパースモデリングのアルゴリズムについては共同研究を通した検証が進んだことから、この後具体的な天文学の成果に結びつけるべく共同研究を通じて検証を続けていく。
    <BR>
    2021年度はゲインを調整するセルフ・キャリブレーションについても新たな方法を提案し、高速化も行った。この新たなセルフ・キャリブレーションは公開されているデータを使った検証で動作を確認したが、この結果を論文化し、共同研究を通した手法の検証を行い、問題点を洗い出す。また、ソフトウェアの普及のために、ソフトウェアのインストール環境とマニュアルの整備を行う。

  9. A high-sensitivity millimeter/submillimeter heterodyne receiver LMT-FINER: Development of a digital sideband separating spectrometer

    2019.4 - 2020.3

    National Astronomical Observatory of Japan  NAOJ Joint Development Research 

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    Authorship:Principal investigator  Grant type:Competitive

    researchmap

  10. Study of growth process of dust-enshrouded super-massive blackholes

    Grant number:17H01108  2017.4 - 2018.3

    Grant-in-Aid for Scientific Research (A)

    Kotaro Kohno

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    Authorship:Coinvestigator(s)  Grant type:Competitive

  11. Investigating Dusty Starburst and Super-Massive Black Hole with 2 mm receiver on LMT

    Grant number:15H02073  2015.4 - 2019.3

    Grant-in-Aid for Scientific Research (A)

    Kawabe Ryohei, Yoichi Tamura, Takeshi Sakai, Kotaro Kohno, Kunihiko Tanaka

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    Authorship:Coinvestigator(s)  Grant type:Competitive

    We developed a single beam and dual polarization 2-mm receiver system for the 50-m LMT (Large Millimeter Telescope) at an altitude of 4600 m in Mexico. The major science goals are 1) to determine unambiguous spectral redshift (spec-z) of submillimeter galaxies (SMGs), i.e, duty starburst galaxies in the early universe, by detecting multiple Carbon Mono-Oxide (C0) lines together with existing 3mm receiver on the LMT, 2) to uncover heavily-obscured accreting super-massive black holes (SMBH) in the early universe. The receiver and spectrometer have been successfully installed on the LMT and it was confirmed that the most sensitive single dish observing system at 2mm has been demonstrated via observations of nearby star forming regions such and also very distant galaxies in CO lines. Our 2mm receiver system will be operated as one of LMT observatory instruments from next observing season, and we will start survey observations of high-z source

  12. Demonstration of on-chip low-dispersion ultra-wideband spectrograph for submm wavelengths using super-conducting resonators

    Grant number:25247019  2013.4 - 2017.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (A)

    Kohno Kotaro, TAMURA Yoichi, KAWABE Ryohei, MATSUHARA Hideo, Ishii SHUN, ENDO Akira

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    We have developed a technology demonstration model of DESHIMA, a new concept spectrograph for the millimeter to submillimeter wave bands. It aims at realizing an ultra-wide instantaneous bandwidth that is remarkably wider than that of heterodyne receivers while having a relatively low spectral resolution. After evaluating in the laboratory, the DESHIMA technology demonstration model was mounted on the submillimeter-wave telescope ASTE operating in the Atacama desert in Chile, and we successfully detected the first astronomical signals from the Orion Molecular Cloud, NGC 253, and so on. The observing instantaneous bandwidth was about 330-370 GHz with 49 spectroscopic channels. We were able to demonstrate the technology of on-chip ultra-wideband submillimeter-wave spectrograph ahead of the world by receiving astronomical signals.

    researchmap

  13. 新しいミリ波サブミリ波観測技術によるガンマ線バースト初期残光の探索

    Grant number:25103503  2013.4 - 2016.3

    日本学術振興会  科学研究費補助金  新学術領域研究(研究領域提案型)

    田村陽一

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    Authorship:Principal investigator  Grant type:Competitive

    Grant amount:\7930000 ( Direct Cost: \6100000 、 Indirect Cost:\1830000 )

  14. 新しいサブミリ波分光方式に基づく高赤方偏移銀河の研究

    Grant number:23840007  2011.4 - 2012.3

    日本学術振興会  科学研究費補助金  研究活動スタート支援

    田村陽一

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    Authorship:Principal investigator  Grant type:Competitive

    Grant amount:\3250000 ( Direct Cost: \2500000 、 Indirect Cost:\750000 )

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Teaching Experience (On-campus) 26

  1. Basic Physics Tutorial I

    2020

  2. Physics Seminars IX-I

    2020

  3. Special Experiments in Earth Science and Astronomy

    2020

  4. Colloquium Radio Astronomy 4

    2020

  5. Colloquium Radio Astronomy 2

    2020

  6. Colloquium Radio Astronomy 3

    2020

  7. Colloquium Radio Astronomy 1

    2020

  8. Physics Seminars IX-I

    2019

  9. 物理学実験Ⅰ

    2019

  10. Basic Physics Tutorial I

    2019

  11. Colloquium Radio Astronomy 4

    2019

  12. Colloquium Radio Astronomy 3

    2019

  13. Colloquium Radio Astronomy 2

    2019

  14. Colloquium Radio Astronomy 1

    2019

  15. Basic Physics Tutorial I

    2018

  16. Physics Seminars IX-I

    2018

  17. Colloquium Radio Astronomy 4

    2018

  18. Colloquium Radio Astronomy 3

    2018

  19. Colloquium Radio Astronomy 2

    2018

  20. Colloquium Radio Astronomy 1

    2018

  21. Physics Seminars IX-I

    2017

  22. Basic Physics Tutorial I

    2017

  23. Colloquium Radio Astronomy 1

    2017

  24. Colloquium Radio Astronomy 4

    2017

  25. Colloquium Radio Astronomy 3

    2017

  26. Colloquium Radio Astronomy 2

    2017

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Teaching Experience (Off-campus) 9

  1. -

    2020 Nagoya University)

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  2. Physical Science Special Lectures

    2019.10 - 2020.3 Kagoshima University)

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    Level:Undergraduate (specialized) 

  3. Advanced Science Special Lectures

    2019.10 - 2020.3 Kagoshima University)

  4. 電波天文学特論Ⅲ

    2018.10 - 2019.3 Tohoku University)

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    Level:Postgraduate 

  5. 天体物理学演習II

    2015 - 2016 The University of Tokyo)

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    Level:Undergraduate (specialized) 

  6. Astronomy Seminars

    2012 - 2014 The University of Tokyo)

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    Level:Undergraduate (specialized) 

  7. 全学自由研究ゼミナール

    2011 - 2016 The University of Tokyo)

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    Level:Undergraduate (liberal arts) 

  8. 基礎天文学実験

    2011 The University of Tokyo)

  9. 全学総合講座「"天"から届いた"文"を読む」

    2011 Dokkyo University)

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    Level:Undergraduate (liberal arts) 

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Social Contribution 22

  1. 講演会「私たちの宇宙は謎で満ちている」

    Role(s):Panelist, Media coverage, Planner, Organizing member

    宮古島市教育委員会・九州共立大学・足利大学  2022.12

  2. 四日市高校スーパーサイエンスハイスクール

    Role(s):Advisor

    2020.4 - 2021.3

  3. 朝日新聞「先端人」取材協力

    Role(s):Media coverage, Informant

    朝日新聞  朝日新聞  2019.8

  4. NHK「コズミックフロント」取材協力

    Role(s):Media coverage, Informant

    NHK  NHK「コズミックフロント」  2018.8

  5. 中日文化センター講座「巨大望遠鏡アルマが明かす宇宙の謎」

    Role(s):Lecturer

    中日新聞社中日文化センター  2018.1

  6. グローバルサイエンスキャンパス NU MIRAI

    Role(s):Lecturer, Advisor, Informant, Planner, Organizing member, Demonstrator

    名古屋大学  2017.7 - 2017.12

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    Audience: High school students

    Type:Research consultation

  7. 日本科学技術館科学ライブショー "ユニバース" 出演

    Role(s):Appearance, Lecturer

    日本科学技術館  科学ライブショー "ユニバース"  2016.7

  8. 日本科学技術館科学ライブショー "ユニバース" 出演

    Role(s):Appearance, Lecturer

    日本科学技術館  科学ライブショー "ユニバース"  2015.7

  9. 南天をいろどる宝石たち — リングの形にゆがめられた遠方の銀河

    Role(s):Media coverage

    ニュートンプレス  ニュートン2015年4月号  2015

  10. 学部生に伝える研究最前線:超高解像度でせまる太古の銀河のすがた

    Role(s):Contribution

    東京大学  理学部ニュース2015年9月号  2015

  11. 朝日カルチャー講座「アルマ望遠鏡が解き明かす宇宙の謎」

    Role(s):Lecturer

    朝日カルチャーセンター横浜  2014.9

  12. 高校生のための夏休み講座

    Role(s):Lecturer

    東京大学  2014.8

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    Audience: Junior students, High school students

    Type:Visiting lecture

  13. 日本科学技術館科学ライブショー "ユニバース" 出演

    Role(s):Appearance, Lecturer

    日本科学技術館  科学ライブショー "ユニバース"  2013.8

  14. 三鷹市立第二小学校職場体験学習

    Role(s):Lecturer

    2013.2

  15. 第7回最新の天文学の普及をめざすワークショップ

    Role(s):Lecturer

    国立天文台  2011.11

  16. 国立天文台野辺山宇宙電波観測所特別公開

    Role(s):Lecturer, Planner, Organizing member

    国立天文台  2011.8

  17. 三鷹市立第二小学校職場体験学習

    Role(s):Lecturer

    2011.2

  18. NHK「サイエンスZERO」情報提供

    Role(s):Media coverage, Informant

    NHK  NHK「サイエンスZERO」  2009.12

  19. Epoch interview — 2009 年宇宙への旅 (3)

    Role(s):Appearance, Media coverage

    日本ガス協会  Gas Epoch 2009年秋号  2009

  20. アストロノミー・トゥデイ — 群れをなすモンスター銀河を発見!

    Role(s):Media coverage

    ニュートンプレス  ニュートン2009年8月号  2009

  21. アステ望遠鏡、115 億光年彼方に爆発的星形成銀河の集団を発見

    Role(s):Contribution

    国立天文台  国立天文台ニュース (ISSN 0915-8863) 2009年6月号, No. 191  2009

  22. 野辺山レインボー干渉計が解き明かす暗黒の宇宙 — 88億年前の怪物銀河で星の材料が大量に見つかった!

    Role(s):Contribution

    国立天文台  国立天文台ニュース (ISSN 0915-8863) 2007年4月号, No. 165  2007

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Media Coverage 4

  1. 先端人 銀河の最初 電波から迫る Newspaper, magazine

    朝日新聞  朝日新聞  2019.9

  2. 超電導技術を駆使した高性能電波観測装置 日蘭共同で開発 Internet

    財経新聞社  財経新聞  2019.9

  3. 132億年前の宇宙に存在した大量の塵の観測に成功! 宇宙初期の星形成史をさかのぼる Internet

    日本経済新聞、時事通信社、Yahoo、NTTドコモ等国内・海外のオンラインメディア54件  2019.3

  4. 銀河のかなた酸素あった 132.8億光年先 名大チーム検出 Newspaper, magazine

    中日新聞社  中日新聞  2018.5

Academic Activities 18

  1. Network Committee, Astronomical Society of Japan

    Role(s):Planning, management, etc., Supervision (editorial), Review, evaluation, Planning/Implementing academic research

    Astronomical Society of Japan  2019.6 - 2021.6

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    Type:Academic society, research group, etc. 

  2. Science/local organizing committee of "A half century of millimeter and submillimeter astronomy" International contribution

    Role(s):Planning, management, etc., Panel moderator, session chair, etc.

    2022.12

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    Type:Academic society, research group, etc. 

  3. 宇宙電波懇談会 運営委員会 委員

    Role(s):Planning, management, etc., Panel moderator, session chair, etc., Planning/Implementing academic research

    宇宙電波懇談会  2022.4

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    Type:Academic society, research group, etc. 

  4. 大型サブミリ波望遠鏡計画白書全班合同ワークショップ

    Role(s):Planning, management, etc.

    2022.3

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    Type:Academic society, research group, etc. 

  5. ALMA Workshop "Synergies between ALMA and wide-field high-cadence multi-wavelength surveys"

    Role(s):Planning, management, etc., Panel moderator, session chair, etc.

    2022.3

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    Type:Academic society, research group, etc. 

  6. 日本天文学会企画セッション「次世代サブミリ波・テラヘルツ波地上単一鏡」

    Role(s):Planning, management, etc., Panel moderator, session chair, etc.

    2021.9

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    Type:Academic society, research group, etc. 

  7. 国立天文台研究集会「(サブ)ミリ波単一鏡の革新で挑む,天文学の未解決問題」

    Role(s):Planning, management, etc., Panel moderator, session chair, etc.

    自然科学研究機構国立天文台  2021.3

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    Type:Academic society, research group, etc. 

  8. 第21回サブミリ波受信機ワークショップ

    Role(s):Panel moderator, session chair, etc.

    2021.3

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    Type:Academic society, research group, etc. 

  9. Thirty Meter Telescope (TMT) Science Advisory Committee, National Astronomical Observatory of Japan

    Role(s):Planning, management, etc., Review, evaluation, Planning/Implementing academic research

    National Astronomical Observatory of Japan  2020.9

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    Type:Scientific advice/Review 

  10. 日本天文学会ネットワーク委員会 委員 International contribution

    Role(s):Planning, management, etc., Supervision (editorial), Planning/Implementing academic research

    日本天文学会  2018.9

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    Type:Academic society, research group, etc. 

  11. 自然科学研究機構国立天文台 ミリ波サブミリ波天文プログラム小委員会 委員長 International contribution

    Role(s):Review, evaluation

    自然科学研究機構国立天文台  2018.9 - 2020.8

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    Type:Scientific advice/Review 

  12. 宇宙航空研究開発機構宇宙科学研究所 次世代赤外線天文衛星(SPICA)国内研究推進委員会 委員

    Role(s):Planning, management, etc.

    宇宙航空研究開発機構宇宙科学研究所  2018.8 - 2020.7

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    Type:Scientific advice/Review 

  13. 日本学術会議 電気電子工学委員会URSI分科会電波天文学小委員会 委員

    日本学術会議  2018.4 - 2020.9

  14. Subaru Telescope Time Allocation Committee, National Astronomical Observatory of Japan International contribution

    Role(s):Review, evaluation

    National Astronomical Observatory of Japan  2017.8 - 2021.8

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    Type:Scientific advice/Review 

  15. 自然科学研究機構国立天文台 ミリ波サブミリ波天文プログラム小委員会 委員

    Role(s):Review, evaluation, Peer review

    自然科学研究機構国立天文台  2017.4 - 2018.6

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    Type:Scientific advice/Review 

  16. 宇宙電波懇談会 運営委員会 委員

    Role(s):Planning, management, etc., Review, evaluation

    宇宙電波懇談会  2016.4 - 2018.3

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    Type:Scientific advice/Review 

  17. 自然科学研究機構国立天文台 野辺山宇宙電波観測所プログラム小委員会 委員

    Role(s):Review, evaluation, Peer review

    自然科学研究機構国立天文台  2015.4 - 2016.6

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    Type:Scientific advice/Review 

  18. Network Committee, Astronomical Society of Japan

    Role(s):Planning, management, etc.

    Astronomical Society of Japan  2013.4 - 2016.3

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    Type:Academic society, research group, etc. 

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