Updated on 2024/09/30

写真a

 
TACHIHARA Kengo
 
Organization
Graduate School of Science Nagoya University Southern Observatories Associate professor
Graduate School
Graduate School of Science
Undergraduate School
School of Science
Title
Associate professor
Contact information
メールアドレス

Degree 1

  1. 博士(理学) ( 1999.8   名古屋大学 ) 

Research Interests 3

  1. 電波観測

  2. 星間物質

  3. 星形成

Research Areas 1

  1. Natural Science / Astronomy  / Radio Astronomy

Current Research Project and SDGs 3

  1. 電波観測で探る星間物質の構造と進化

  2. 観測的星形成

  3. NANTEN2電波望遠鏡の運用と観測装置の開発

Research History 7

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

    2013.4

  2. The Joint ALMA Observatory, NAOJ   Assistant Professor

    2010.10 - 2013.3

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    Country:Chile

  3. National Astronomical Observatory of Japan (NAOJ) East-Asia ALMA Regional Center   Assistant Professor

    2010.4 - 2010.9

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    Country:Japan

  4. National Astronomical Observatory of Japan (NAOJ) East-Asia ALMA Regional Center Project Researcher

    2008.4 - 2010.3

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    Country:Japan

  5. Kobe University Center of Excellence (COE) researcher

    2005.4 - 2008.3

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    Country:Japan

  6. Astrophysikalisches Insititut und Universitätes-Sternwarte Jena (JSPS Postdoctoral Fellowships for Research Abroad)

    2003.3 - 2005.3

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    Country:Germany

  7. Max-Planck Institut für extraterrestrische Physik, Researcher

    1999.9 - 2003.2

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    Country:Germany

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Professional Memberships 2

  1. International Astronomical Union

    2006.9

  2. 日本天文学会

    1997.1

Committee Memberships 4

  1. Joint ALMA Observatory   ALMA Science Advisory Committee  

    2020.1 - 2022.12   

  2. 国立極地研究所   南極観測計画アドバイザー  

    2022.8   

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    Committee type:Academic society

  3. ALMA East-Asia ALMA regional center   ALMA Japan Science Advisory Committee  

    2014.4   

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    Committee type:Academic society

  4. East-Asia ALMA Regional Center   ALMA East-Asia Science Advisory Committee  

    2014.4   

Awards 1

  1. 欧文研究報告論文賞

    2002.3   日本天文学会  

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    Award type:Honored in official journal of a scientific society, scientific journal  Country:Japan

 

Papers 163

  1. Giant molecular clouds and their type classification in M 74: Toward understanding star formation and cloud evolution

    Demachi, F; Fukui, Y; Yamada, R; Tachihara, K; Hayakawa, T; Tokuda, K; Fujita, S; Kobayashi, MIN; Muraoka, K; Konishi, A; Tsuge, K; Onishi, T; Kawamura, A

    PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN     2024.8

  2. ACA CO(J=2-1) mapping of the nearest spiral galaxy M 33. II. Exploring the evolution of giant molecular clouds

    Konishi, A; Muraoka, K; Tokuda, K; Fujita, S; Fukui, Y; Yamada, R; Demachi, F; Tachihara, K; Kobayashi, MIN; Kuno, N; Tsuge, K; Sano, H; Miura, RE; Kawamura, A; Onishi, T

    PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN     2024.8

  3. A kinematic analysis of the giant molecular complex W3: Possible evidence for cloud-cloud collisions that triggered OB star clusters in W3 Main and W3(OH)

    Yamada, RI; Sano, H; Tachihara, K; Enokiya, R; Nishimura, A; Fujita, S; Kohno, M; Bieging, JH; Fukui, Y

    PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN     2024.7

  4. Internal 1000 au Scale Structures of the R CrA Cluster-forming Cloud. I. Filamentary Structures

    Tachihara, K; Fukaya, N; Tokuda, K; Yamasaki, Y; Nishioka, T; Abe, D; Inoue, T; Harada, N; Shoshi, A; Nozaki, S; Sato, A; Omura, M; Fujishiro, K; Fukagawa, M; Machida, MN; Kanai, T; Oasa, Y; Onishi, T; Saigo, K; Fukui, Y

    ASTROPHYSICAL JOURNAL   Vol. 968 ( 2 )   2024.6

  5. High-mass star formation in the Large Magellanic Cloud triggered by colliding H I flows

    Tsuge, K; Sano, H; Tachihara, K; Bekki, K; Tokuda, K; Inoue, T; Mizuno, N; Kawamura, A; Onishi, T; Fukui, Y

    PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN   Vol. 76 ( 4 ) page: 589 - 615   2024.5

  6. Discovery of Asymmetric Spike-like Structures of the 10 au Disk around the Very Low-luminosity Protostar Embedded in the Taurus Dense Core MC 27/L1521F with ALMA

    Tokuda, K; Harada, N; Omura, M; Matsumoto, T; Onishi, T; Saigo, K; Shoshi, A; Nozaki, S; Tachihara, K; Fukaya, N; Fukui, Y; Inutsuka, S; Machida, MN

    ASTROPHYSICAL JOURNAL   Vol. 965 ( 2 )   2024.4

  7. Ring Gap Structure around Class I Protostar WL 17

    Shoshi, A; Harada, N; Tokuda, K; Kawasaki, Y; Yamasaki, H; Sato, A; Omura, M; Yamaguchi, M; Tachihara, K; Machida, MN

    ASTROPHYSICAL JOURNAL   Vol. 961 ( 2 )   2024.2

  8. The Gamma-Ray Origin of RX J0852.0-4622 Quantifying the Hadronic and Leptonic Components: Further Evidence for the Cosmic-Ray Acceleration in Young Shell-type SNRs

    Fukui, Y; Aruga, M; Sano, H; Hayakawa, T; Inoue, T; Rowell, G; Einecke, S; Tachihara, K

    ASTROPHYSICAL JOURNAL   Vol. 961 ( 2 )   2024.2

  9. Secondary Outflow Driven by the Protostar Ser-emb 15 in Serpens

    Sato, A; Tokuda, K; Machida, MN; Tachihara, K; Harada, N; Yamasaki, H; Hirano, S; Onishi, T; Matsushita, Y

    ASTROPHYSICAL JOURNAL   Vol. 958 ( 2 )   2023.12

  10. ALMA Observations of Supernova Remnant N49 in the Large Magellanic Cloud. II. Non-LTE Analysis of Shock-heated Molecular Clouds

    Sano, H; Yamane, Y; van Loon, JT; Furuya, K; Fukui, Y; Alsaberi, RZE; Bamba, A; Enokiya, R; Filipovic, MD; Indebetouw, R; Inoue, T; Kawamura, A; Lakicevic, M; Law, CJ; Mizuno, N; Murase, T; Onishi, T; Park, S; Plucinsky, PP; Rho, J; Richards, AMS; Rowell, G; Sasaki, M; Seok, J; Sharda, P; Staveley-Smith, L; Suzuki, H; Temim, T; Tokuda, K; Tsuge, K; Tachihara, K

    ASTROPHYSICAL JOURNAL   Vol. 958 ( 1 )   2023.11

  11. An ALMA-resolved View of 7000 au Protostellar Gas Ring around the Class I Source CrA-IRS 2 as a Possible Sign of Magnetic Flux Advection

    Tokuda, K; Fukaya, N; Tachihara, K; Omura, M; Harada, N; Nozaki, S; Shoshi, A; Machida, MN

    ASTROPHYSICAL JOURNAL LETTERS   Vol. 956 ( 1 )   2023.10

  12. ACA CO(<i>J</i>=2-1) Mapping of the Nearest Spiral Galaxy M33. I. Initial Results and Identification of Molecular Clouds

    Muraoka, K; Konishi, A; Tokuda, K; Kondo, H; Miura, RE; Tosaki, T; Onodera, S; Kuno, N; Kobayashi, MIN; Tsuge, K; Sano, H; Kitano, N; Fujita, S; Nishimura, A; Onishi, T; Saigo, K; Yamada, RI; Demachi, F; Tachihara, K; Fukui, Y; Kawamura, A

    ASTROPHYSICAL JOURNAL   Vol. 953 ( 2 )   2023.8

  13. Properties of Star Formation of the Large Magellanic Cloud As Probed by Young Stellar Objects

    Kokusho, T; Torii, H; Kaneda, H; Fukui, Y; Tachihara, K

    ASTROPHYSICAL JOURNAL   Vol. 953 ( 1 )   2023.8

  14. An Unbiased CO Survey Toward the Northern Region of the Small Magellanic Cloud with the Atacama Compact Array. II. CO Cloud Catalog

    Ohno, T; Tokuda, K; Konishi, A; Matsumoto, T; Sewilo, M; Kondo, H; Sano, H; Tsuge, K; Zahorecz, S; Goto, N; Neelamkodan, N; Wong, TY; Fukushima, H; Takekoshi, T; Muraoka, K; Kawamura, A; Tachihara, K; Fukui, Y; Onishi, T

    ASTROPHYSICAL JOURNAL   Vol. 949 ( 2 )   2023.6

  15. Molecular clouds at the eastern edge of radio nebula W 50

    Sakemi, H; Machida, M; Yamamoto, H; Tachihara, K

    PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN   Vol. 75 ( 2 ) page: 338 - 350   2023.4

  16. Ammonia mapping observations of the Galactic infrared bubble N49: Three NH<sub>3</sub> clumps along the molecular filament

    Kohno, M; Chibueze, JO; Burns, RA; Omodaka, T; Handa, T; Murase, T; Yamada, RI; Nagayama, T; Nakano, M; Sunada, K; Tachihara, K; Fukui, Y

    PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN   Vol. 75 ( 2 ) page: 397 - 415   2023.4

  17. Crescent-shaped Molecular Outflow from the Intermediate-mass Protostar DK Cha Revealed by ALMA

    Harada, N; Tokuda, K; Yamasaki, H; Sato, A; Omura, M; Hirano, S; Onishi, T; Tachihara, K; Machida, MN

    ASTROPHYSICAL JOURNAL   Vol. 945 ( 1 )   2023.3

  18. Molecular and Atomic Clouds Associated with the Gamma-Ray Supernova Remnant Puppis A

    Aruga, M; Sano, H; Fukui, Y; Reynoso, EM; Rowell, G; Tachihara, K

    ASTROPHYSICAL JOURNAL   Vol. 938 ( 2 )   2022.10

  19. Evidence for a cloud-cloud collision in Sh2-233 triggering the formation of the high-mass protostar object IRAS 05358+3543

    Yamada, RI; Fukui, Y; Sano, H; Tachihara, K; Bieging, JH; Enokiya, R; Nishimura, A; Fujita, S; Kohno, M; Tsuge, K

    MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY   Vol. 515 ( 1 ) page: 1012 - 1025   2022.7

  20. Unraveling the Observational Signatures of Cloud-Cloud Collision and Hub-filament Systems in W31

    Maity, AK; Dewangan, LK; Sano, H; Tachihara, K; Fukui, Y; Bhadari, NK

    ASTROPHYSICAL JOURNAL   Vol. 934 ( 1 )   2022.7

  21. An ALMA Study of the Massive Molecular Clump N159W-North in the Large Magellanic Cloud: A Possible Gas Flow Penetrating One of the Most Massive Protocluster Systems in the Local Group

    Tokuda, K; Minami, T; Fukui, Y; Inoue, T; Nishioka, T; Tsuge, K; Zahorecz, S; Sano, H; Konishi, A; Chen, CHR; Sewilo, M; Madden, SC; Nayak, O; Saigo, K; Nishimura, A; Tanaka, KEI; Sawada, T; Indebetouw, R; Tachihara, K; Kawamura, A; Onishi, T

    ASTROPHYSICAL JOURNAL   Vol. 933 ( 1 )   2022.7

  22. An Expanding Shell of Neutral Hydrogen Associated with SN 1006: Hints for the Single-degenerate Origin and Faint Hadronic Gamma-Rays

    Sano, H; Yamaguchi, H; Aruga, M; Fukui, Y; Tachihara, K; Filipovic, MD; Rowell, G

    ASTROPHYSICAL JOURNAL   Vol. 933 ( 2 )   2022.7

  23. Nobeyama 45 m Local Spur CO survey. I. Giant molecular filaments and cluster formation in the Vulpecula OB association

    Kohno, M; Nishimura, A; Fujita, S; Tachihara, K; Onishi, T; Tokuda, K; Fukui, Y; Miyamoto, Y; Ueda, S; Kiridoshi, R; Tsutsumi, D; Torii, K; Minamidani, T; Saigo, K; Handa, T; Sano, H

    PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN   Vol. 74 ( 1 ) page: 24 - 49   2022.2

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    Language:Japanese  

    DOI: 10.1093/pasj/psab107

    Web of Science

  24. The Long Tails of the Pegasus-Pisces Arch Intermediate Velocity Cloud

    Shelton, RL; Williams, ME; Parker, MC; Galyardt, JE; Fukui, Y; Tachihara, K

    ASTROPHYSICAL JOURNAL   Vol. 925 ( 2 )   2022.2

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    DOI: 10.3847/1538-4357/ac39a4

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  25. Active surface measurements for large aperture millimeter/submillimeter-wave telescopes using a photogrammetry technique

    Nishimura, A; Tachihara, K; Nishimoto, S; Fujita, S; Nishikawa, K; Yoneda, R; Handa, K; Kurakami, T; Ogawa, H; Onishi, T

    GROUND-BASED AND AIRBORNE TELESCOPES IX   Vol. 12182   2022

  26. A Study on a Delay-Line-Based Ramp-Compare ADC for Radio Astronomical Applications

    Nishimura, A; Matsumoto, T; Matsue, Y; Yonetsu, T; Nakao, Y; Fujita, S; Maezawa, H; Tachihara, K; Onishi, T; Ogawa, H

    2022 ASIA-PACIFIC MICROWAVE CONFERENCE (APMC)     page: 581 - 583   2022

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  27. An Unbiased CO Survey toward the Northern Region of the Small Magellanic Cloud with the Atacama Compact Array. I. Overview: CO Cloud Distributions

    Tokuda, K; Kondo, H; Ohno, T; Konishi, A; Sano, H; Tsuge, K; Zahorecz, S; Goto, N; Neelamkodan, N; Wong, T; Sewilo, M; Fukushima, H; Takekoshi, T; Muraoka, K; Kawamura, A; Tachihara, K; Fukui, Y; Onishi, T

    ASTROPHYSICAL JOURNAL   Vol. 922 ( 2 )   2021.12

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    DOI: 10.3847/1538-4357/ac1ff4

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  28. ALMA CO Observations of the Mixed-morphology Supernova Remnant W49B: Efficient Production of Recombining Plasma and Hadronic Gamma Rays via Shock-Cloud Interactions

    Sano, H; Yoshiike, S; Yamane, Y; Hayashi, K; Enokiya, R; Tokuda, K; Tachihara, K; Rowell, G; Filipovic, MD; Fukui, Y

    ASTROPHYSICAL JOURNAL   Vol. 919 ( 2 )   2021.10

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    DOI: 10.3847/1538-4357/ac0dba

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  29. Massive star formation in the Carina nebula complex and Gum 31. II. A cloud-cloud collision in Gum 31

    Fujita, S; Sano, H; Enokiya, R; Hayashi, K; Kohno, M; Tsuge, K; Tachihara, K; Nishimura, A; Ohama, A; Yamane, Y; Ohno, T; Yamada, RI; Fukui, Y

    PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN   Vol. 73 ( 5 ) page: 1255 - 1261   2021.10

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    DOI: 10.1093/pasj/psab071

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  30. Associated Molecular and Atomic Clouds with X-Ray Shell of Superbubble 30 Doradus C in the LMC

    Yamane, Y; Sano, H; Filipovic, MD; Tokuda, K; Fujii, K; Babazaki, Y; Mitsuishi, I; Inoue, T; Aharonian, F; Inaba, T; Inutsuka, S; Maxted, N; Mizuno, N; Onishi, T; Rowell, G; Tsuge, K; Voisin, F; Yoshiike, S; Fukuda, T; Kawamura, A; Bamba, A; Tachihara, K; Fukui, Y

    ASTROPHYSICAL JOURNAL   Vol. 918 ( 1 )   2021.9

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    DOI: 10.3847/1538-4357/ac0adb

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  31. A kinematic analysis of the CO clouds toward a reflection nebula NGC 2023 observed using the Nobeyama 45 m telescope: Further evidence for a cloud-cloud collision in the Orion region

    Yamada, RI; Enokiya, R; Sano, H; Fujita, S; Kohno, M; Tsutsumi, D; Nishimura, A; Tachihara, K; Fukui, Y

    PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN   Vol. 73 ( 4 ) page: 880 - 893   2021.8

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    DOI: 10.1093/pasj/psab050

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  32. Pursuing the Origin of the Gamma Rays in RX J1713.7-3946 Quantifying the Hadronic and Leptonic Components

    Fukui, Y; Sano, H; Yamane, Y; Hayakawa, T; Inoue, T; Tachihara, K; Rowell, G; Einecke, S

    ASTROPHYSICAL JOURNAL   Vol. 915 ( 2 )   2021.7

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    DOI: 10.3847/1538-4357/abff4a

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  33. ALMA Observations of Giant Molecular Clouds in M33. III. Spatially Resolved Features of the Star formation Inactive Million-solar-mass Cloud

    Kondo, H; Tokuda, K; Muraoka, K; Nishimura, A; Fujita, S; Tosaki, T; Zahorecz, S; Miura, RE; Kobayashi, MIN; Onodera, S; Torii, K; Kuno, N; Sano, H; Onishi, T; Saigo, K; Fukui, Y; Kawamura, A; Tsuge, K; Tachihara, K

    ASTROPHYSICAL JOURNAL   Vol. 912 ( 1 )   2021.5

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    DOI: 10.3847/1538-4357/abeb65

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  34. The formation of the young massive cluster B1 in the Antennae Galaxies (NGC 4038/NGC 4039) triggered by cloud-cloud collision Reviewed

    Tsuge K., Tachihara K., Fukui Y., Sano H., Tokuda K., Ueda J., Iono D.

    PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN   Vol. 73 ( 2 ) page: 417 - 430   2021.4

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    DOI: 10.1093/pasj/psab008

    Web of Science

  35. ALMA view of the Galactic super star cluster RCW 38 at 270 au resolution Reviewed

    Torii K., Tokuda K., Tachihara K., Onishi T., Fukui Y.

    PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN   Vol. 73 ( 1 ) page: 205 - 219   2021.2

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

    DOI: 10.1093/pasj/psaa115

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  36. Observations of the [C I] ($^{3}$P$_{1}$-$^{3}$P$_{0}$) emission toward the massive star-forming region RCW 38: Further evidence for highly-clumped density distribution of the molecular gas Reviewed

    Izumi N., Fukui Y., Tachihara K., Fujita S., Torii K., Kamazaki T., Kaneko H., Silva A., Iono D., Momose M., Sugimoto K., Nakazato T., Kosugi G., Maekawa J., Takahashi S., Yoshino A., Asayama S.

    PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN   Vol. 73 ( 1 ) page: 174 - 196   2021.2

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    DOI: 10.1093/pasj/psaa113

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  37. CO observations of the molecular gas in the Galactic H II region Sh2-48: Evidence for cloud-cloud collision as a trigger of high-mass star formation Reviewed

    Torii K., Hattori Y., Matsuo M., Fujita S., Nishimura A., Kohno M., Kuriki M., Tsuda Y., Minamidani T., Umemoto T., Kuno N., Yoshiike S., Ohama A., Tachihara K., Fukui Y., Shima K., Habe A., Haworth T. J.

    PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN   Vol. 73 ( Supplement_1 ) page: S368 - S384   2021.1

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    DOI: 10.1093/pasj/psy098

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  38. CO observations toward the isolated mid-infrared bubble S44: External triggering of O-star formation by a cloud-cloud collision Reviewed

    Kohno M., Tachihara K., Fujita S., Hattori Y., Torii K., Nishimura A., Hanaoka M., Yoshiike S., Enokiya R., Hasegawa K., Ohama A., Sano H., Yamamoto H., Fukui Y.

    PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN   Vol. 73 ( Supplement_1 ) page: S338 - S354   2021.1

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    DOI: 10.1093/pasj/psy109

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  39. Triggered high-mass star formation in the H II region W 28 A2: A cloud-cloud collision scenario Reviewed

    Hayashi K., Yoshiike S., Enokiya R., Fujita S., Yamada R., Sano H., Torii K., Kohno M., Nishimura A., Ohama A., Yamamoto H., Tachihara K., Wong G., Maxted N., Braiding C., Rowell G., Burton M., Fukui Y.

    PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN   Vol. 73 ( Supplement_1 ) page: S321 - S337   2021.1

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    DOI: 10.1093/pasj/psaa054

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  40. FOREST unbiased Galactic plane imaging survey with the Nobeyama 45 m telescope (FUGIN). VIII. Possible evidence of cloud-cloud collisions triggering high-mass star formation in the giant molecular cloud M 16 (Eagle Nebula)} Reviewed

    Nishimura A., Fujita S., Kohno M., Tsutsumi D., Minamidani T., Torii K., Umemoto T., Matsuo M., Tsuda Y., Kuriki M., Kuno N., Sano H., Yamamoto H., Tachihara K., Fukui Y.

    PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN   Vol. 73 ( Supplement_1 ) page: S285 - S299   2021.1

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    DOI: 10.1093/pasj/psaa083

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  41. High-mass star formation in Orion possibly triggered by cloud-cloud collision. III. NGC 2068 and NGC 2071 Reviewed

    Fujita S., Tsutsumi D., Ohama A., Habe A., Sakre N., Okawa K., Kohno M., Hattori Y., Nishimura A., Torii K., Sano H., Tachihara K., Kimura K., Ogawa H., Fukui Y.

    PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN   Vol. 73 ( Supplement_1 ) page: S273 - S284   2021.1

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    DOI: 10.1093/pasj/psaa005

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  42. High-mass star formation in Orion B triggered by cloud-cloud collision: Merging molecular clouds in NGC 2024 Reviewed

    Enokiya R., Ohama A., Yamada R., Sano H., Fujita S., Hayashi K., Tsutsumi D., Torii K., Nishimura A., Konishi R., Yamamoto H., Tachihara K., Hasegawa Y., Kimura K., Ogawa H., Fukui Y.

    PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN   Vol. 73 ( Supplement_1 ) page: S256 - S272   2021.1

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

    DOI: 10.1093/pasj/psaa049

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  43. Massive star formation in the Carina nebula complex and Gum 31. I. the Carina nebula complex Reviewed

    Fujita S., Sano H., Enokiya R., Hayashi K., Kohno M., Tsuge K., Tachihara K., Nishimura A., Ohama A., Yamane Y., Ohno T., Yamada R., Fukui Y.

    PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN   Vol. 73 ( Supplement_1 ) page: S201 - S219   2021.1

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    DOI: 10.1093/pasj/psaa078

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  44. Massive star formation in W51 A triggered by cloud-cloud collisions Reviewed

    Fujita S., Torii K., Kuno N., Nishimura A., Umemoto T., Minamidani T., Kohno M., Yamagishi M., Tosaki T., Matsuo M., Tsuda Y., Enokiya R., Tachihara K., Ohama A., Sano H., Okawa K., Hayashi K., Yoshiike S., Tsutsumi D., Fukui Y.

    PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN   Vol. 73 ( Supplement_1 ) page: S172 - S200   2021.1

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

    DOI: 10.1093/pasj/psz028

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  45. FOREST unbiased Galactic plane imaging survey with the Nobeyama 45 m telescope (FUGIN). VI. Dense gas and mini-starbursts in the W 43 giant molecular cloud complex Reviewed

    Kohno M., Tachihara K., Torii K., Fujita S., Nishimura A., Kuno N., Umemoto T., Minamidani T., Matsuo M., Kiridoshi R., Tokuda K., Hanaoka M., Tsuda Y., Kuriki M., Ohama A., Sano H., Hasegawa T., Sofue Y., Habe A., Onishi T., Fukui Y.

    PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN   Vol. 73 ( Supplement_1 ) page: S129 - S171   2021.1

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

    DOI: 10.1093/pasj/psaa015

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  46. An intermediate-velocity H I> cloud falling to the galactic disk; Possible evidence for low-metallicity H I> gas originating outside the galactic disk Reviewed

    Fukui Y., Koga M., Maruyama S., Hayakawa T., Okamoto R., Yamamoto H., Tachihara K., Shelton R., Sasaki M.

    PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN   Vol. 73 ( Supplement_1 ) page: S117 - S128   2021.1

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

    DOI: 10.1093/pasj/psy120

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  47. Cloud-cloud collisions and triggered star formation Reviewed

    Fukui Y., Habe A., Inoue T., Enokiya R., Tachihara K.

    PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN   Vol. 73 ( Supplement_1 ) page: S1 - S34   2021.1

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    DOI: 10.1093/pasj/psaa103

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  48. The formation of young massive clusters triggered by cloud-cloud collisions in the Antennae galaxies NGC 4038/NGC 4039

    Tsuge, K; Fukui, Y; Tachihara, K; Sano, H; Tokuda, K; Ueda, J; Iono, D; Finn, MK

    PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN   Vol. 73   page: S35 - S61   2021.1

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    DOI: 10.1093/pasj/psaa033

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  49. ALMA CO Observations of the Gamma-Ray Supernova Remnant RX J1713.7-3946: Discovery of Shocked Molecular Cloudlets and Filaments at 0.01 pc Scales Reviewed

    Sano H., Inoue T., Tokuda K., Tanaka T., Yamazaki R., Inutsuka S., Aharonian F., Rowell G., Filipovic M. D., Yamane Y., Yoshiike S., Maxted N., Uchida H., Hayakawa T., Tachihara K., Uchiyama Y., Fukui Y.

    ASTROPHYSICAL JOURNAL LETTERS   Vol. 904 ( 2 )   2020.12

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    DOI: 10.3847/2041-8213/abc884

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  50. Formation of the Musca filament: evidence for asymmetries in the accretion flow due to a cloud-cloud collision Reviewed

    Bonne L., Bontemps S., Schneider N., Clarke S. D., Arzoumanian D., Fukui Y., Tachihara K., Csengeri T., Guesten R., Ohama A., Okamoto R., Simon R., Yahia H., Yamamoto H.

    ASTRONOMY & ASTROPHYSICS   Vol. 644   2020.11

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    DOI: 10.1051/0004-6361/202038281

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  51. ALMA Observations of Giant Molecular Clouds in M33. II. Triggered High-mass Star Formation by Multiple Gas Colliding Events at the NGC 604 Complex Reviewed

    Muraoka Kazuyuki, Kondo Hiroshi, Tokuda Kazuki, Nishimura Atsushi, Miura Rie E., Onodera Sachiko, Kuno Nario, Zahorecz Sarolta, Tsuge Kisetsu, Sano Hidetoshi, Fujita Shinji, Onishi Toshikazu, Saigo Kazuya, Tachihara Kengo, Fukui Yasuo, Kawamura Akiko

    ASTROPHYSICAL JOURNAL   Vol. 903 ( 2 )   2020.11

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    DOI: 10.3847/1538-4357/abb822

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  52. ALMA CO Observations of Gamma-Ray Supernova Remnant N132D in the Large Magellanic Cloud: Possible Evidence for Shocked Molecular Clouds Illuminated by Cosmic-Ray Protons Reviewed

    Sano H., Plucinsky P. P., Bamba A., Sharda P., Filipovic M. D., Law C. J., Alsaberi R. Z. E., Yamane Y., Tokuda K., Acero F., Sasaki M., Vink J., Inoue T., Inutsuka S., Shimoda J., Tsuge K., Fujii K., Voisin F., Maxted N., Rowell G., Onishi T., Kawamura A., Mizuno N., Yamamoto H., Tachihara K., Fukui Y.

    ASTROPHYSICAL JOURNAL   Vol. 902 ( 1 )   2020.10

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    DOI: 10.3847/1538-4357/abb469

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  53. A Low-velocity Bipolar Outflow from a Deeply Embedded Object in Taurus Revealed by the Atacama Compact Array Reviewed

    Fujishiro Kakeru, Tokuda Kazuki, Tachihara Kengo, Takashima Tatsuyuki, Fukui Yasuo, Zahorecz Sarolta, Saigo Kazuya, Matsumoto Tomoaki, Tomida Kengo, Machida Masahiro N., Inutsuka Shu-ichiro, Andre Philippe, Kawamura Akiko, Onishi Toshikazu

    ASTROPHYSICAL JOURNAL LETTERS   Vol. 899 ( 1 )   2020.8

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    DOI: 10.3847/2041-8213/ab9ca8

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  54. FRagmentation and Evolution of Dense Cores Judged by ALMA (FREJA). I. Overview: Inner similar to 1000 au Structures of Prestellar/Protostellar Cores in Taurus Reviewed

    Tokuda Kazuki, Fujishiro Kakeru, Tachihara Kengo, Takashima Tatsuyuki, Fukui Yasuo, Zahorecz Sarolta, Saigo Kazuya, Matsumoto Tomoaki, Tomida Kengo, Machida Masahiro N., Inutsuka Shu-ichiro, Andre Philippe, Kawamura Akiko, Onishi Toshikazu

    ASTROPHYSICAL JOURNAL   Vol. 899 ( 1 )   2020.8

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    DOI: 10.3847/1538-4357/ab9ca7

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  55. ALMA Observations of Giant Molecular Clouds in M33. I. Resolving Star Formation Activities in the Giant Molecular Filaments Possibly Formed by a Spiral Shock Reviewed

    Tokuda Kazuki, Muraoka Kazuyuki, Kondo Hiroshi, Nishimura Atsushi, Tosaki Tomoka, Zahorecz Sarolta, Onodera Sachiko, Miura Rie E., Torii Kazufumi, Kuno Nario, Fujita Shinji, Sano Hidetoshi, Onishi Toshikazu, Saigo Kazuya, Fukui Yasuo, Kawamura Akiko, Tachihara Kengo

    ASTROPHYSICAL JOURNAL   Vol. 896 ( 1 )   2020.6

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    DOI: 10.3847/1538-4357/ab8ad3

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  56. FOREST unbiased Galactic plane imaging survey with the Nobeyama 45 m telescope (FUGIN). VII. Molecular fraction of HI clouds Reviewed

    Nakanish Hiroyuki, Fujita Shinji, Tachihara Kengo, Izumi Natsuko, Matsuo Mitsuhiro, Umemoto Tomofumi, Asa Yumiko, Inoue Tsuyoshi

    PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN   Vol. 72 ( 3 )   2020.6

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    DOI: 10.1093/pasj/psaa027

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  57. Development of the new multi-beam receiver and telescope control system for NASCO Reviewed

    Nishimura A., Ohama A., Kimura K., Tsutsumi D., Matsue Y., Yamada R., Sakamoto M., Matsunaga K., Hasegawa Y., Minami T., Matsumoto T., Shiotani K., Okuda S., Fujishiro K., Sakasai K., Suzuki M., Saeki S., Satani K., Urushihara K., Kato C., Kondo T., Okawa K., Kurita D., Inaba T., Maruyama S., Koga M., Noda K., Kohno M., Iwamura H., Hori Y., Nishikawa K., Nishioka T., Pang T., Sano H., Enokiya R., Yoshiike S., Fujita S., Hayashi K., Torii K., Hayakawa T., Taniguchi A., Tsuge K., Yamane Y., Hattori Y., Ohno T., Ueda S., Masui S., Yamasaki Y., Kondo H., Suzuki K., Kobayashi K., Fujii Y., Fujii Y., Minamidani T., Okuda T., Yamamoto H., Tachihara K., Onishi T., Mizuno A., Ogawa H., Fukui Y.

    Society of Photo-Optical Instrumentation Engineers (SPIE) Conference Series   Vol. 11453 ( 11453 )   2020

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    DOI: 10.1117/12.2562053

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  58. Development of a new software system for radio telescope using robot operating system Reviewed

    Kondo H., Matsumoto T., Nishimura A., Ueda S., Konishi R., Nakao Y., Nishikawa K., Nishimoto S., Fujita S., Konishi A., Tsutsumi T., Yamada R., Takashima T., Tachihara K., Onishi T., Ogawa H.

    Society of Photo-Optical Instrumentation Engineers (SPIE) Conference Series   Vol. 11452 ( 11452 )   2020

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    DOI: 10.1117/12.2562247

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  59. FOREST Unbiased Galactic Plane Imaging Survey with the Nobeyama 45 m telescope (FUGIN). IV. Galactic shock wave and molecular bow shock in the 4 kpc arm of the Galaxy Reviewed

    Sofue Yoshiaki, Kohno Mikito, Torii Kazufumi, Umemoto Tomofumi, Kuno Nario, Tachihara Kengo, Minamidani Tetsuhiro, Fujita Shinji, Matsuo Mitsuhiro, Nishimura Atsushi, Tsuda Yuya, Seta Masumichi

    PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN   Vol. 71   2019.12

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    DOI: 10.1093/pasj/psy094

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  60. FOREST Unbiased Galactic Plane Imaging Survey with the Nobeyama 45 m telescope (FUGIN). V. Dense gas mass fraction of molecular gas in the Galactic plane Reviewed

    Torii Kazufumi, Fujita Shinji, Nishimura Atsushi, Tokuda Kazuki, Kohno Mikito, Tachihara Kengo, Inutsuka Shu-ichiro, Matsuo Mitsuhiro, Kuriki Mika, Tsuda Yuya, Minamidani Tetsuhiro, Umemoto Tomofumi, Kuno Nario, Miyamoto Yusuke

    PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN   Vol. 71   2019.12

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    DOI: 10.1093/pasj/psz033

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  61. An ALMA View of Molecular Filaments in the Large Magellanic Cloud. I. The Formation of High-mass Stars and Pillars in the N159E-Papillon Nebula Triggered by a Cloud-Cloud Collision Reviewed

    Fukui Yasuo, Tokuda Kazuki, Saigo Kazuya, Harada Ryohei, Tachihara Kengo, Tsuge Kisetsu, Inoue Tsuyoshi, Torii Kazufumi, Nishimura Atsushi, Zahorecz Sarolta, Nayak Omnarayani, Meixner Margaret, Minamidani Tetsuhiro, Kawamura Akiko, Mizuno Norikazu, Indebetouw Remy, Sewilo Marta, Madden Suzanne, Galametz Maud, Lebouteiller Vianney, Chen C. -H. Rosie, Onishi Toshikazu

    ASTROPHYSICAL JOURNAL   Vol. 886 ( 1 )   2019.11

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    DOI: 10.3847/1538-4357/ab4900

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  62. An ALMA View of Molecular Filaments in the Large Magellanic Cloud. II. An Early Stage of High-mass Star Formation Embedded at Colliding Clouds in N159W-South Reviewed

    Tokuda Kazuki, Fukui Yasuo, Harada Ryohei, Saigo Kazuya, Tachihara Kengo, Tsuge Kisetsu, Inoue Tsuyoshi, Torii Kazufumi, Nishimura Atsushi, Zahorecz Sarolta, Nayak Omnarayani, Meixner Margaret, Minamidani Tetsuhiro, Kawamura Akiko, Mizuno Norikazu, Indebetouw Remy, Sewilo Marta, Madden Suzanne, Galametz Maud, Lebouteiller Vianney, Chen C. -H. Rosie, Onishi Toshikazu

    ASTROPHYSICAL JOURNAL   Vol. 886 ( 1 )   2019.11

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    DOI: 10.3847/1538-4357/ab48ff

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  63. Discovery of Shocked Molecular Clouds Associated with the Shell-type Supernova Remnant RX J0046.5-7308 in the Small Magellanic Cloud Reviewed

    Sano H., Matsumura H., Yamane Y., Maggi P., Fujii K., Tsuge K., Tokuda K., Alsaberi R. Z. E., Filipovic M. D., Maxted N., Rowell G., Uchida H., Tanaka T., Muraoka K., Takekoshi T., Onishi T., Kawamura A., Minamidani T., Mizuno N., Yamamoto H., Tachihara K., Inoue T., Inutsuka S., Voisin F., Tothill N. F. H., Sasaki M., McClure-Griffiths N. M., Fukui Y.

    ASTROPHYSICAL JOURNAL   Vol. 881 ( 1 )   2019.8

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    DOI: 10.3847/1538-4357/ab2ade

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  64. A centrally concentrated sub-solar-mass starless core in the Taurus L1495 filamentary complex Reviewed

    Tokuda Kazuki, Tachihara Kengo, Saigo Kazuya, Andre Phillipe, Miyamoto Yosuke, Zahorecz Sarolta, Inutsuka Shu-ichiro, Matsumoto Tomoaki, Takashima Tatsuyuki, Machida Masahiro N., Tomida Kengo, Taniguchi Kotomi, Fukui Yasuo, Kawamura Akiko, Tatematsu Ken'ichi, Kandori Ryo, Onishi Toshikazu

    PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN   Vol. 71 ( 4 )   2019.8

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    DOI: 10.1093/pasj/psz051

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  65. Gas and Dust Properties in the Chamaeleon Molecular Cloud Complex Based on the Optically Thick HI Reviewed

    Hayashi Katsuhiro, Okamoto Ryuji, Yamamoto Hiroaki, Hayakawa Takahiro, Tachihara Kengo, Fukui Yasuo

    ASTROPHYSICAL JOURNAL   Vol. 878 ( 2 )   2019.6

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    DOI: 10.3847/1538-4357/ab2051

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  66. Unveiling Molecular Clouds toward Bipolar H II Region G8.14+0.23 Reviewed

    Dewangan L. K., Sano H., Enokiya R., Tachihara K., Fukui Y., Ojha D. K.

    ASTROPHYSICAL JOURNAL   Vol. 878 ( 1 )   2019.6

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    DOI: 10.3847/1538-4357/ab1cba

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  67. Possible Evidence for Cosmic-Ray Acceleration in the Type Ia SNR RCW 86: Spatial Correlation between TeV Gamma-Rays and Interstellar Atomic Protons Reviewed

    Sano H., Rowell G., Reynoso E. M., Jung-Richardt I., Yamane Y., Nagaya T., Yoshiike S., Hayashi K., Torii K., Maxted N., Mitsuishi I., Inoue T., Inutsuka S., Yamamoto H., Tachihara K., Fukui Y.

    ASTROPHYSICAL JOURNAL   Vol. 876 ( 1 )   2019.5

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    DOI: 10.3847/1538-4357/ab108f

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  68. Formation of high-mass stars in an isolated environment in the Large Magellanic Cloud Reviewed

    Harada Ryohei, Onishi Toshikazu, Tokuda Kazuki, Zahorecz Sarolta, Hughes Annie, Meixner Margaret, Sewilo Marta, Indebetouw Remy, Nayak Omnarayani, Fukui Yasuo, Tachihara Kengo, Tsuge Kisetstu, Kawamura Akiko, Saigo Kazuya, Wong Tony, Bernard Jean-Philippe, Stephens Ian W.

    PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN   Vol. 71 ( 2 )   2019.4

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    DOI: 10.1093/pasj/psz011

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  69. ALMA CO Observations of Supernova Remnant N63A in the Large Magellanic Cloud: Discovery of Dense Molecular Clouds Embedded within Shock-ionized and Photoionized Nebulae Reviewed

    Sano H., Matsumura H., Nagaya T., Yamane Y., Alsaberi R. Z. E., Filipovic M. D., Tachihara K., Fujii K., Tokuda K., Tsuge K., Yoshiike S., Onishi T., Kawamura A., Minamidani T., Mizuno N., Yamamoto H., Inutsuka S., Inoue T., Maxted N., Rowell G., Sasaki M., Fukui Y.

    ASTROPHYSICAL JOURNAL   Vol. 873 ( 1 )   2019.3

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    DOI: 10.3847/1538-4357/ab02fd

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  70. FUGIN: Molecular Gas in Spitzer Bubble N4-Possible Evidence for a Cloud-Cloud Collision as a Trigger of Massive Star Formations Reviewed

    Fujita Shinji, Torii Kazufumi, Tachihara Kengo, Enokiya Rei, Hayashi Katsuhiro, Kuno Nario, Kohno Mikito, Yamagishi Mitsuyoshi, Nishimura Atsushi, Umemoto Tomofumi, Minamida Tetsuhiro, Matsuo Mitsuhiro, Tsuda Yuya, Sano Hidetoshi, Tsutsumi Daichi, Oham Akio, Yoshiike Satoshi, Okawa Azuki, Fukui Yasuo

    ASTROPHYSICAL JOURNAL   Vol. 872 ( 1 )   2019.2

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    DOI: 10.3847/1538-4357/aafac5

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  71. Formation of the Active Star-forming Region LHA 120-N 44 Triggered by Tidally Driven Colliding HI Flows Reviewed

    Tsuge Kisetsu, Sano Hidetoshi, Tachihara Kengo, Yozin Cameron, Bekki Kenji, Inoue Tsuyoshi, Mizuno Norikazu, Kawamura Akiko, Onishi Toshikazu, Fukui Yasuo

    ASTROPHYSICAL JOURNAL   Vol. 871 ( 1 )   2019.1

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    DOI: 10.3847/1538-4357/aaf4fb

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  72. Molecular Clouds Associated with the Type Ia SNR N103B in the Large Magellanic Cloud Reviewed

    Sano H., Yamane Y., Tokuda K., Fujii K., Tsuge K., Nagaya T., Yoshiike S., Filipovic M. D., Alsaberi R. Z. E., Barnes L., Onishi T., Kawamura A., Minamidani T., Mizuno N., Yamamoto H., Tachihara K., Maxted N., Voisin F., Rowell G., Yamaguchi H., Fukui Y.

    ASTROPHYSICAL JOURNAL   Vol. 867 ( 1 )   2018.11

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    DOI: 10.3847/1538-4357/aae07c

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  73. Molecular filament formation and filament-cloud interaction: Hints from Nobeyama 45 m telescope observations Reviewed

    Arzoumanian Doris, Shimajiri Yoshito, Inutsuka Shu-ichiro, Inoue Tsuyoshi, Tachihara Kengo

    PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN   Vol. 70 ( 5 )   2018.10

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    DOI: 10.1093/pasj/psy095

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  74. Discovery of Molecular and Atomic Clouds Associated with the Gamma-Ray Supernova Remnant Kesteven 79 Reviewed

    Kuriki M., Sano H., Kuno N., Seta M., Yamane Y., Inaba T., Nagaya T., Yoshiike S., Okawa K., Tsutsumi D., Hattori Y., Kohno M., Fujita S., Nishimura A., Ohama A., Matsuo M., Tsuda Y., Torii K., Minamidani T., Umemoto T., Rowell G., Bamba A., Tachihara K., Fukui Y.

    ASTROPHYSICAL JOURNAL   Vol. 864 ( 2 )   2018.9

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    DOI: 10.3847/1538-4357/aad7be

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  75. ALMA Observations of Supernova Remnant N49 in the LMC. I. Discovery of CO Clumps Associated with X-Ray and Radio Continuum Shells Reviewed

    Yamane Y., Sano H., van Loon J. Th., Filipovic M. D., Fujii K., Tokuda K., Tsuge K., Nagaya T., Yoshiike S., Grieve K., Voisin F., Rowell G., Indebetouw R., Lakicevic M., Temim T., Staveley-Smith L., Rho J., Long K. S., Park S., Seok J., Mizuno N., Kawamura A., Onishi T., Inoue T., Inutsuka S., Tachihara K., Fukui Y.

    ASTROPHYSICAL JOURNAL   Vol. 863 ( 1 )   2018.8

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    DOI: 10.3847/1538-4357/aacfff

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  76. Warm CO Gas Generated by Possible Turbulent Shocks in a Low-mass Star-forming Dense Core in Taurus Reviewed

    Tokuda Kazuki, Onishi Toshikazu, Saigo Kazuya, Matsumoto Tomoaki, Inoue Tsuyoshi, Inutsuka Shu-ichiro, Fukui Yasuo, Machida Masahiro N., Tomida Kengo, Hosokawa Takashi, Kawamura Akiko, Tachihara Kengo

    ASTROPHYSICAL JOURNAL   Vol. 862 ( 1 )   2018.7

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    DOI: 10.3847/1538-4357/aac898

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  77. Synthetic Observations of 21 cm H I Line Profiles from Inhomogeneous Turbulent Interstellar H I Gas with Magnetic Fields Reviewed

    Fukui Yasuo, Hayakawa Takahiro, Inoue Tsuyoshi, Torii Kazufumi, Okamoto Ryuji, Tachihara Kengo, Onishi Toshikazu, Hayashi Katsuhiro

    ASTROPHYSICAL JOURNAL   Vol. 860 ( 1 )   2018.6

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    DOI: 10.3847/1538-4357/aac16c

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  78. A New Look at the Molecular Gas in M42 and M43: Possible Evidence for Cloud-Cloud Collision that Triggered Formation of the OB Stars in the Orion Nebula Cluster Reviewed

    Fukui Yasuo, Torii Kazufumi, Hattori Yusuke, Nishimura Atsushi, Ohama Akio, Shimajiri Yoshito, Shima Kazuhiro, Habe Asao, Sano Hidetoshi, Kohno Mikito, Yamamoto Hiroaki, Tachihara Kengo, Onishi Toshikazu

    ASTROPHYSICAL JOURNAL   Vol. 859 ( 2 )   2018.6

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    DOI: 10.3847/1538-4357/aac217

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  79. Detailed CO(J=1-0, 2-1, and 3-2) observations toward an H II region RCW 32 in the Vela Molecular Ridge Reviewed

    Enokiya Rei, Sano Hidetoshi, Hayashi Katsuhiro, Tachihara Kengo, Torii Kazufumi, Yamamoto Hiroaki, Hattori Yusuke, Hasegawa Yutaka, Ohama Akio, Kimura Kimihiro, Ogawa Hideo, Fukui Yasuo

    PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN   Vol. 70   2018.5

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    DOI: 10.1093/pasj/psy015

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  80. Large-scale CO J =1-0 observations of the giant molecular cloud associated with the infrared ring N35 with the Nobeyama 45 m telescope Reviewed

    Torii Kazufumi, Fujita Shinji, Matsuo Mitsuhiro, Nishimura Atsushi, Kohno Mikito, Kuriki Mika, Tsuda Yuya, Minamidani Tetsuhiro, Umemoto Tomofumi, Kuno Nario, Hattori Yusuke, Yoshiike Satoshi, Ohama Akio, Tachihara Kengo, Shima Kazuhiro, Habe Asao, Fukui Yasuo

    PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN   Vol. 70   2018.5

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    DOI: 10.1093/pasj/psy019

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  81. High-mass star formation possibly triggered by cloud-cloud collision in the H II region RCW 34 Reviewed

    Hayashi Katsuhiro, Sano Hidetoshi, Enokiya Rei, Torii Kazufumi, Hattori Yusuke, Kohno Mikito, Fujita Shinji, Nishimura Atsushi, Ohama Akio, Yamamoto Hiroaki, Tachihara Kengo, Hasegawa Yutaka, Kimura Kimihiro, Ogawa Hideo, Fukui Yasuo

    PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN   Vol. 70   2018.5

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    DOI: 10.1093/pasj/psx141

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  82. Formation of the young compact cluster GM 24 triggered by a cloud-cloud collision Reviewed

    Fukui Yasuo, Kohno Mikito, Yokoyama Keiko, Nishimura Atsushi, Torii Kazufumi, Hattori Yusuke, Sano Hidetoshi, Ohama Akio, Yamamoto Hiroaki, Tachihara Kengo

    PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN   Vol. 70   2018.5

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    DOI: 10.1093/pasj/psx144

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  83. FOREST Unbiased Galactic plane Imaging survey with the Nobeyama 45 m telescope (FUGIN): Molecular clouds toward W 33; possible evidence for a cloud-cloud collision triggering O star formation Reviewed

    Kohno Mikito, Torii Kazufumi, Tachihara Kengo, Umemoto Tomofumi, Minamidani Tetsuhiro, Nishimura Atsushi, Fujita Shinji, Matsuo Mitsuhiro, Yamagishi Mitsuyoshi, Tsuda Yuya, Kuriki Mika, Kuno Nario, Ohama Akio, Hattori Yusuke, Sano Hidetoshi, Yamamoto Hiroaki, Fukui Yasuo

    PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN   Vol. 70   2018.5

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    DOI: 10.1093/pasj/psx137

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  84. FOREST Unbiased Galactic plane Imaging survey with the Nobeyama 45 m telescope (FUGIN). III. Possible evidence for formation of NGC 6618 cluster in M 17 by cloud-cloud collision Reviewed

    Nishimura Atsushi, Minamidani Tetsuhiro, Umemoto Tomofumi, Fujita Shinji, Matsuo Mitsuhiro, Hattori Yusuke, Kohno Mikito, Yamagishi Mitsuyoshi, Tsuda Yuya, Kuriki Mika, Kuno Nario, Torii Kazufumi, Tsutsumi Daichi, Okawa Kazuki, Sano Hidetoshi, Tachihara Kengo, Ohama Akio, Fukui Yasuo

    PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN   Vol. 70   2018.5

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    DOI: 10.1093/pasj/psx149

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  85. Molecular clouds in the NGC 6334 and NGC 6357 region: Evidence for a 100 pc-scale cloud-cloud collision triggering the Galactic mini-starbursts Reviewed

    Fukui Yasuo, Kohno Mikito, Yokoyama Keiko, Torii Kazufumi, Hattori Yusuke, Sano Hidetoshi, Nishimura Atsushi, Ohama Akio, Yamamoto Hiroaki, Tachihara Kengo

    PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN   Vol. 70   2018.5

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    DOI: 10.1093/pasj/psy017

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  86. Triggering the formation of the supergiant H II region NGC 604 in M 33 Reviewed

    Tachihara Kengo, Gratier Pierre, Sano Hidetoshi, Tsuge Kisetsu, Miura Rie E., Muraoka Kazuyuki, Fukui Yasuo

    PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN   Vol. 70   2018.5

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    DOI: 10.1093/pasj/psy020

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  87. The formation of a Spitzer bubble RCW 79 triggered by a cloud-cloud collision Reviewed

    Ohama Akio, Kohno Mikito, Hasegawa Keisuke, Torii Kazufumi, Nishimura Atsushi, Hattori Yusuke, Hayakawa Takahiro, Inoue Tsuyoshi, Sano Hidetoshi, Yamamoto Hiroaki, Tachihara Kengo, Fukui Yasuo

    PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN   Vol. 70   2018.5

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    DOI: 10.1093/pasj/psy025

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  88. RCW 36 in the Vela Molecular Ridge: Evidence for high-mass star-cluster formation triggered by cloud-cloud collision Reviewed

    Sano Hidetoshi, Enokiya Rei, Hayashi Katsuhiro, Yamagishi Mitsuyoshi, Saeki Shun, Okawa Kazuki, Tsuge Kisetsu, Tsutsumi Daichi, Kohno Mikito, Hattori Yusuke, Yoshiike Satoshi, Fujita Shinji, Nishimura Atsushi, Ohama Akio, Tachihara Kengo, Torii Kazufumi, Hasegawa Yutaka, Kimura Kimihiro, Ogawa Hideo, Wong Graeme F., Braiding Catherine, Rowell Gavin, Burton Michael G., Fukui Yasuo

    PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN   Vol. 70   2018.5

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    DOI: 10.1093/pasj/psy006

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  89. Molecular gas in the H II-region complex RCW 166: Possible evidence for an early phase of cloud-cloud collision prior to the bubble formation Reviewed

    Ohama Akio, Kohno Mikito, Fujita Shinji, Tsutsumi Daichi, Hattori Yusuke, Torii Kazufumi, Nishimura Atsushi, Sano Hidetoshi, Yamamoto Hiroaki, Tachihara Kengo, Fukui Yasuo

    PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN   Vol. 70   2018.5

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    DOI: 10.1093/pasj/psy012

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  90. Molecular clouds toward three Spitzer bubbles S116, S117, and S118: Evidence for a cloud-cloud collision which formed the three H II regions and a 10 pc scale molecular cavity Reviewed

    Fukui Yasuo, Ohama Akio, Kohno Mikito, Torii Kazufumi, Fujita Shinji, Hattori Yusuke, Nishimura Atsushi, Yamamoto Hiroaki, Tachihara Kengo

    PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN   Vol. 70   2018.5

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    DOI: 10.1093/pasj/psy005

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  91. Molecular clouds in the NGC6334 and NGC6357 region: Evidence for a 100 pc-scale cloud-cloud collision triggering the Galactic mini-starbursts (vol 70, pg S41, 2018) Reviewed

    Fukui Yasuo, Kohno Mikito, Yokoyama Keiko, Torii Kazufumi, Hattori Yusuke, Sano Hidetoshi, Nishimura Atsushi, Ohama Akio, Yamamoto Hiroaki, Tachihara Kengo

    PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN   Vol. 70   2018.5

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    DOI: 10.1093/pasj/psy051

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  92. Molecular Cloud Structures and Massive Star Formation in N159 Reviewed

    Nayak O., Meixner M., Fukui Y., Tachihara K., Onishi T., Saigo K., Tokuda K., Harada R.

    ASTROPHYSICAL JOURNAL   Vol. 854 ( 2 )   2018.2

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    DOI: 10.3847/1538-4357/aaab5f

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  93. Triggered O Star Formation in M20 via Cloud-Cloud Collision: Comparisons between High-resolution CO Observations and Simulations Reviewed

    Torii K., Hattori Y., Hasegawa K., Ohama A., Haworth T. J., Shima K., Habe A., Tachihara K., Mizuno N., Onishi T., Mizuno A., Fukui Y.

    ASTROPHYSICAL JOURNAL   Vol. 835 ( 2 ) page: 142   2017.2

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    DOI: 10.3847/1538-4357/835/2/142

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  94. Kinematic Structure of Molecular Gas around High-mass YSO, Papillon Nebula, in N159 East in the Large Magellanic Cloud: A New Perspective with ALMA Reviewed

    Saigo, K., Onishi, T., Nayak, O., Meixner, M., Tokuda, K., Harada, R., Morioka, Y., Sewiło, M., Indebetouw, R., Torii, K., Kawamura, A., Ohama, A., Hattori, Y., Yamamoto, H., Tachihara, K., Minamidani, T., Inoue, T., Madden, S., Galametz, M., Lebouteiller, V., Chen, C.-H. R., Mizuno, N., & Fukui, Y.

    The Astrophysical Journal   Vol. 835 ( 1 ) page: 108   2017.1

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    DOI: 10.3847/1538-4357/835/1/108

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  95. Formation of the twin galactic starburst regions NGC6357 and NGC6334 Reviewed

    Torii Kazufumi, Hasegawa Keisuke, Ohama Akio, Yamamoto Hiroaki, Tachihara Kengo, Fukui Yasuo

    FORMATION, EVOLUTION, AND SURVIVAL OF MASSIVE STAR CLUSTERS   Vol. 12 ( S316 ) page: 173 - 174   2017

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    DOI: 10.1017/S1743921316000016

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  96. TOWARD UNDERSTANDING THE ORIGIN OF TURBULENCE IN MOLECULAR CLOUDS: SMALL-SCALE STRUCTURES AS UNITS OF DYNAMICAL MULTI-PHASE INTERSTELLAR MEDIUM Reviewed

    Tachihara Kengo, Saigo Kazuya, Higuchi Aya E., Inoue Tsuyohshi, Inutsuka Shu-ichiro, Hackstein Moritz, Haas Martin, Mugrauer Markus

    ASTROPHYSICAL JOURNAL   Vol. 754 ( 2 )   2012.8

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    DOI: 10.1088/0004-637X/754/2/95

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  97. ALMA CO observations of a giant molecular cloud in M 33: Evidence for high-mass star formation triggered by cloud-cloud collisions Reviewed

    Sano H., Tsuge K., Tokuda K., Muraoka K., Tachihara K., Yamane Y., Kohno M., Fujita S., Enokiya R., Rowell G., Maxted N., Filipovic M. D., Knies J., Sasaki M., Onishi T., Plucinsky P. P., Fukui Y.

    PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN   Vol. 73 ( Supplement_1 ) page: S62   2021.1

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    DOI: 10.1093/pasj/psaa045

  98. The formation of young massive clusters triggered by cloud-cloud collisions in the Antennae galaxies NGC 4038/NGC 4039 Reviewed

    Tsuge K., Fukui Y., Tachihara K., Sano H., Tokuda K., Ueda J., Iono D., Finn M. K.

    PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN   Vol. 73 ( Supplement_1 ) page: S35   2021.1

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    DOI: 10.1093/pasj/psaa045

  99. Star Formation in the Sh 2-53 Region Influenced by Accreting Molecular Filaments Reviewed

    T. Baug, L. K. Dewangan, D. K. Ojha, Kengo Tachihara, A. K. Pandey, Saurabh Sharma, M. Tamura, J. P. Ninan, S. K. Ghosh

    Astrophysical Journal   Vol. 852 ( 2 )   2018.1

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    We present a multiwavelength analysis of a ∼30′ ×30′ area around the Sh 2-53 region (hereafter S53 complex), which is associated with at least three H ii regions, two mid-infrared bubbles (N21 and N22), and infrared dark clouds. The 13CO line data trace the molecular content of the S53 complex in a velocity range of 36-60 km s-1 and show the presence of at least three molecular components within the selected area along this direction. Using the observed radio continuum flux of the H ii regions, the derived spectral types of the ionizing sources agree well with the previously reported results. The S53 complex harbors clusters of young stellar objects (YSOs) that are identified using the photometric 2-24 μm magnitudes. It also hosts several massive condensations (3000-30,000 M⊙) that are traced in the Herschel column density map. The complex is found at the junction of at least five molecular filaments, and the flow of gas toward the junction is evident in the velocity space of the 13CO data. Together, the S53 complex is embedded in a very similar "hub-filament" system to those reported in Myers, and the active star formation is evident toward the central "hub" inferred by the presence of the clustering of YSOs.

    DOI: 10.3847/1538-4357/aaa429

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    Scopus

  100. A Detailed Study of the Interstellar Protons toward the TeV gamma-Ray SNR RX J0852.0-4622 (G266.2-1.2, Vela Jr.): The Third Case of the gamma-Ray and ISM Spatial Correspondence Reviewed

    Y. Fukui, H. Sano, J. Sato, R. Okamoto, T. Fukuda, S. Yoshiike, K. Hayashi, K. Torii, T. Hayakawa, G. Rowell, M. D. Filipovic, N. Maxted, N. M. McClure-Griffiths, A. Kawamura, H. Yamamoto, T. Okuda, N. Mizuno, K. Tachihara, T. Onishi, A. Mizuno, H. Ogawa

    ASTROPHYSICAL JOURNAL   Vol. 850 ( 1 )   2017.11

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    We present a new analysis of the interstellar protons toward the TeV gamma-ray SNR RX J0852.0-4622 (G266.2-1.2, Vela Jr.). We used the NANTEN2 (CO)-C-12(J = 1-0) and Australia Telescope Compact Array and Parkes H I data sets in order to derive the molecular and atomic gas associated with the TeV gamma-ray shell of the SNR. We find that atomic gas over a velocity range from V-LSR =-4 to 50 km s(-1) or 60 km s(-1) is associated with the entire SNR, while molecular gas is associated with a limited portion of the SNR. The large velocity dispersion of the H I is ascribed to the expanding motion of a few H I shells overlapping toward the SNR but is not due to the Galactic rotation. The total masses of the associated H I and molecular gases are estimated to be similar to 2.5 x 10(4) M-circle dot and similar to 10(3) M-circle dot), respectively. A comparison with the High Energy Stereoscopic System TeV gamma-rays indicates that the interstellar protons have an average density around 100 cm(-3) and shows a good spatial correspondence with the TeV gamma-rays. The total cosmic-ray proton energy is estimated to be 1048 erg for the hadronic gamma-ray production, which may still be an underestimate by a factor of a few due to a small filling factor of the SNR volume by the interstellar protons. This result presents a third case, after RX J1713.7-3946 and HESS J1731-347, of the good spatial correspondence between the TeV gamma-rays and the interstellar protons, lending further support for a hadronic component in the gamma-rays from young TeV gamma-ray SNRs.

    DOI: 10.3847/1538-4357/aa9219

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  101. A Detached Protostellar Disk around a similar to 0.2M(circle dot) Protostar in a Possible Site of a Multiple Star Formation in a Dynamical Environment in Taurus Reviewed

    Kazuki Tokuda, Toshikazu Onishi, Kazuya Saigo, Takashi Hosokawa, Tomoaki Matsumoto, Shu-ichiro Inutsuka, Masahiro N. Machida, Kengo Tomida, Masanobu Kunitomo, Akiko Kawamura, Yasuo Fukui, Kengo Tachihara

    ASTROPHYSICAL JOURNAL   Vol. 849 ( 2 )   2017.11

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    We report ALMA observations in 0.87 mm continuum and (CO)-C-12 (J = 3-2) toward a very low-luminosity (< 0.1 L-circle dot) protostar, which is deeply embedded in one of the densest cores, MC27/ L1521F, in Taurus with an indication of multiple star formation in a highly dynamical environment. The beam size corresponds to similar to 20 au, and we have clearly detected blueshifted/ redshifted gas in (CO)-C-12 associated with the protostar. The spatial/ velocity distributions of the gas show there is a rotating disk with a size scale of similar to 10 au, a disk mass of similar to 10(-4) M-circle dot, and a central stellar mass of similar to 0.2 M-circle dot. The observed disk seems to be detached from the surrounding dense gas, although it is still embedded at the center of the core whose density is similar to 10(6) cm(-3). The current low-outflow activity and the very low luminosity indicate that the mass accretion rate onto the protostar is extremely low in spite of a very early stage of star formation. We may be witnessing the final stage of the formation of similar to 0.2 M-circle dot protostar. However, we cannot explain the observed low luminosity with the standard pre-main-sequence evolutionary track unless we assume cold accretion with an extremely small initial radius of the protostar (similar to 0.65 R.). These facts may challenge our current understanding of the low mass star formation, in particular the mass accretion process onto the protostar and the circumstellar disk.

    DOI: 10.3847/1538-4357/aa8e9e

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  102. The Hi-GAL compact source catalogue - I. The physical properties of the clumps in the inner Galaxy (-71.degrees 0 &lt; l &lt; 67.degrees 0) Reviewed

    Davide Elia, S. Molinari, E. Schisano, M. Pestalozzi, S. Pezzuto, M. Merello, A. Noriega-Crespo, T. J. T. Moore, D. Russeil, J. C. Mottram, R. Paladini, F. Strafella, M. Benedettini, J. P. Bernard, A. Di Giorgio, D. J. Eden, Y. Fukui, R. Plume, J. Bally, P. G. Martin, S. E. Ragan, S. E. Jaffa, F. Motte, L. Olmi, N. Schneider, L. Testi, F. Wyrowski, A. Zavagno, L. Calzoletti, F. Faustini, P. Natoli, P. Palmeirim, F. Piacentini, L. Piazzo, G. L. Pilbratt, D. Polychroni, A. Baldeschi, M. T. Beltran, N. Billot, L. Cambresy, R. Cesaroni, P. Garcia-Lario, M. G. Hoare, M. Huang, G. Joncas, S. J. Liu, B. M. T. Maiolo, K. A. Marsh, Y. Maruccia, P. Mege, N. Peretto, K. L. J. Rygl, P. Schilke, M. A. Thompson, A. Traficante, G. Umana, M. Veneziani, D. Ward-Thompson, A. P. Whitworth, H. Arab, M. Bandieramonte, U. Becciani, M. Brescia, C. Buemi, F. Bufano, R. Butora, S. Cavuoti, A. Costa, E. Fiorellino, A. Hajnal, T. Hayakawa, P. Kacsuk, P. Leto, G. Li Causi, N. Marchili, S. Martinavarro-Armengol, A. Mercurio, M. Molinaro, G. Riccio, H. Sano, E. Sciacca, K. Tachihara, K. Torii, C. Trigilio, F. Vitello, H. Yamamoto

    MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY   Vol. 471 ( 1 ) page: 100 - 143   2017.10

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    Hi-GAL (Herschel InfraRed Galactic Plane Survey) is a large-scale survey of the Galactic plane, performed with Herschel in five infrared continuum bands between 70 and 500 mu m. We present a band-merged catalogue of spatially matched sources and their properties derived from fits to the spectral energy distributions (SEDs) and heliocentric distances, based on the photometric catalogues presented in Molinari et al., covering the portion of Galactic plane -71.degrees 0 &lt; l &lt; 67.degrees 0. The band-merged catalogue contains 100 922 sources with a regular SED, 24 584 of which show a 70-mu m counterpart and are thus considered protostellar, while the remainder are considered starless. Thanks to this huge number of sources, we are able to carry out a preliminary analysis of early stages of star formation, identifying the conditions that characterize different evolutionary phases on a statistically significant basis. We calculate surface densities to investigate the gravitational stability of clumps and their potential to form massive stars. We also explore evolutionary status metrics such as the dust temperature, luminosity and bolometric temperature, finding that these are higher in protostellar sources compared to pre-stellar ones. The surface density of sources follows an increasing trend as they evolve from pre-stellar to protostellar, but then it is found to decrease again in themajority of the most evolved clumps. Finally, we study the physical parameters of sources with respect to Galactic longitude and the association with spiral arms, finding only minor or no differences between the average evolutionary status of sources in the fourth and first Galactic quadrants, or between 'on-arm' and 'interarm' positions.

    DOI: 10.1093/mnras/stx1357

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  103. FOREST unbiased Galactic plane imaging survey with the Nobeyama 45 m telescope (FUGIN). I. Project overview and initial results Reviewed

    Tomofumi Umemoto, Tetsuhiro Minamidani, Nario Kuno, Shinji Fujita, Mitsuhiro Matsuo, Atsushi Nishimura, Kazufumi Torii, Tomoka Tosaki, Mikito Kohno, Mika Kuriki, Yuya Tsuda, Akihiko Hirota, Satoshi Ohashi, Mitsuyoshi Yamagishi, Toshihiro Handa, Hiroyuki Nakanishi, Toshihiro Omodaka, Nagito Koide, Naoko Matsumoto, Toshikazu Onishi, Kazuki Tokuda, Masumichi Seta, Yukinori Kobayashi, Kengo Tachihara, Hidetoshi Sano, Yusuke Hattori, Sachiko Onodera, Yumiko Oasa, Kazuhisa Kamegai, Masato Tsuboi, Yoshiaki Sofue, Aya E. Higuchi, James O. Chibueze, Norikazu Mizuno, Mareki Honma, Erik Muller, Tsuyoshi Inoue, Kana Morokuma-Matsui, Hiroko Shinnaga, Takeaki Ozawa, Ryo Takahashi, Satoshi Yoshiike, Jean Costes, Sho Kuwahara

    PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN   Vol. 69 ( 5 )   2017.10

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    The FUGIN project is one of legacy projects using a new multi-beam FOREST (four-beam receiver system on the 45m telescope). This project aims to simultaneously investigate the distribution, kinematics, and physical properties of both diffuse and dense molecular gases in the Galaxy by observing (CO)-C-12, (CO)-C-13, and (CO)-O-18 J = 1-0 lines simultaneously. Mapping regions are parts of the first quadrant (10 degrees &lt;= l &lt;= 50 degrees, | b| &lt;= 1 degrees) and the third quadrant (198 degrees &lt;= l = 236 degrees, | b| &lt;= 1.) of the Galaxy, where spiral arms, bar structure, and the molecular gas ring are included. This survey achieves the highest angular resolution to date (similar to 20") for theGalactic plane survey in the COJ= 1-0 lines, whichmakes it possible to find dense clumps located farther away than the previous surveys. FUGIN will provide us an invaluable dataset for investigating the physics of the Galactic interstellar medium (ISM), particularly the evolution of interstellar gas covering galactic-scale structures to the internal structures of giant molecular clouds, such as small filaments/clumps/cores. We present an overview of the FUGIN project, the observation plan and initial results. These results reveal wide-field and detailed structures of molecular clouds, such as entangled filaments that have not been obvious in previous surveys, and large-scale kinematics of molecular gas, such as spiral arms.

    DOI: 10.1093/pasj/psx061

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  104. Interstellar gas and X-rays toward the Young supernova remnant RCW86; pursuit of the origin of the thermal and non-thermal X-ray Reviewed

    H. Sano, E. M. Reynoso, I. Mitsuishi, K. Nakamura, N. Furukawa, K. Mruganka, T. Fukuda, S. Yoshiike, A. Nishimura, A. Ohama, K. Torii, T. Kuwahara, T. Okuda, H. Yamamoto, K. Tachihara, Y. Fukui

    JOURNAL OF HIGH ENERGY ASTROPHYSICS   Vol. 15   page: 1 - 18   2017.9

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    We have analyzed the atomic and molecular gas using the 21 cm Hi and 2.6/1.3mm CO emissions toward the young supernova remnant (SNR) RCW 86 in order to identify the interstellar medium with which the shock waves of the SNR interact. We have found an HI intensity depression in the velocity range between -46 and -28 km s(-1) toward the SNR, suggesting a cavity in the interstellar medium. The HI cavity coincides with the thermal and non-thermal emitting X-ray shell. The thermal X-rays are coincident with the edge of the HI distribution, which indicates a strong density gradient, while the non-thermal X-rays are found toward the less dense, inner part of the HI cavity. The most significant non-thermal X-rays are seen toward the southwestern part of the shell where the HI gas traces the dense and cold component. We also identified CO clouds which are likely interacting with the SNR shock waves in the same velocity range as the Hi, although the CO clouds are distributed only in a limited part of the SNR shell. The most massive cloud is located in the southeastern part of the shell, showing detailed correspondence with the thermal X-rays. These CO clouds show an enhanced CO J = 2-1/1-0 intensity ratio, suggesting heating/compression by the shock front. We interpret that the shock-cloud interaction enhances non-thermal X-rays in the southwest and the thermal X-rays are emitted by the shock-heated gas of density 10-100 cm(-3). Moreover, we can clearly see an HI envelope around the CO cloud, suggesting that the progenitor had a weaker wind than the massive progenitor of the core-collapse SNR RX J1713.7-3949. It seems likely that the progenitor of RCW 86 was a system consisting of a white dwarf and a low-mass star with low-velocity accretion winds. (C) 2017 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.jheap.2017.04.002

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  105. Discovery of Molecular and Atomic Clouds Associated with the Magellanic Superbubble 30 Doradus C Reviewed

    H. Sano, Y. Yamane, F. Voisin, K. Fujii, S. Yoshiike, T. Inaba, K. Tsuge, Y. Babazaki, I. Mitsuishi, R. Yang, F. Aharonian, G. Rowell, M. D. Filipovic, N. Mizuno, K. Tachihara, A. Kawamura, T. Onishi, Y. Fukui

    ASTROPHYSICAL JOURNAL   Vol. 843 ( 1 )   2017.7

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    We analyzed the 2.6 mm CO and 21 cm H I lines toward the Magellanic superbubble 30. Doradus. C, in order to reveal the associated molecular and atomic gas. We uncovered five molecular clouds in a velocity range from 251 to 276 km s(-1) toward the western shell. The non-thermal X-rays are clearly enhanced around the molecular clouds on a parsec scale, suggesting possible evidence for magnetic field amplification via shock-cloud interaction. The thermal X-rays are brighter in the eastern shell, where there are no dense molecular or atomic clouds, opposite to. the western shell. The TeV gamma- ray distribution may spatially match the total interstellar proton column density as well as the non-thermal X-rays. If the hadronic gamma-ray is dominant, the total energy of the cosmic-ray protons is at least similar to 1.2 x 10(50) erg with the estimated mean interstellar proton density similar to 60 cm(-3). In addition, the gamma-ray flux associated with the molecular cloud (e.g., MC3) could be detected and resolved by the Cherenkov Telescope Array (CTA). This should permit CTA to probe the diffusion of cosmic-rays into the associated dense ISM.

    DOI: 10.3847/1538-4357/aa73e0

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  106. Formation of the young massive cluster R136 triggered by tidally-driven colliding HI flows Reviewed

    Yasuo Fukui, Kisetsu Tsuge, Hidetoshi Sano, Kenji Bekki, Cameron Yozin, Kengo Tachihara, Tsuyoshi Inoue

    PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN   Vol. 69 ( 3 )   2017.6

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    Understanding massive cluster formation is one of the important issues of astronomy. By analyzing the HI data, we have identified that the two HI velocity components (L- and D-components) are colliding toward the HI Ridge, in the southeastern end of the Large Magellanic Cloud (LMC), which hosts the young massive cluster R136 and similar to 400 O/Wolf-Rayet stars (Doran et al. 2013, A&A, 558, A134) including the progenitor of SN 1987A. The collision is possibly evidenced by bridge features connecting the two HI components and by complementary distributions between them. We frame a hypothesis that the collision triggered the formation of R136 and the surrounding high-mass stars as well as the HI Ridge and the Molecular Ridge. Fujimoto and Noguchi (1990, PASJ, 42, 505) advocated that the last tidal interaction between the LMC and the Small Magellanic Cloud (SMC) induced collision of the L- and D-components about 0.2 Gyr ago. Thismodel is consistent with numerical simulations (Bekki & Chiba 2007a, MNRAS, 381, L16). We suggest that a dense HI, cloud of 10(6) M-circle dot partly including CO, a precursor of R136, was formed at the shock-compressed interface between the colliding L- and D-components. We suggest that part of the low-metallicity gas from the SMC wasmixed in the tidal interaction based on the Planck/IRAS data of dust optical depth (Planck Collaboration 2014, A&A, 571, A11).

    DOI: 10.1093/pasj/psx032

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  107. A Massive Molecular Outflow in the Dense Dust Core AGAL G337.916-00.477 Reviewed

    Kazufumi Torii, Yusuke Hattori, Keisuke Hasegawa, Akio Ohama, Hiroaki Yamamoto, Kengo Tachihara, Kazuki Tokuda, Toshikazu Onishi, Yasuki Hattori, Daisuke Ishihara, Hidehiro Kaneda, Yasuo Fukui

    ASTROPHYSICAL JOURNAL   Vol. 840 ( 2 )   2017.5

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    Massive molecular outflows erupting from high-mass young stellar objects (YSOs) provide important clues to understanding the mechanism of high-mass star formation. Based on new CO J = 3-2 and J = 1-0 observations using the Atacama Submillimeter Telescope Experiment (ASTE) and Mopra telescope facilities, we discovered a massive bipolar outflow associated with the dense dust core AGAL G337.916-00.477 (AGAL337.9-S), located 3.48 kpc from the Sun. The outflow lobes have extensions of less than 1 pc-and thus were not fully resolved in the angular resolutions of ASTE and Mopra-and masses of similar to 50M(circle dot) The maximum velocities of the outflow lobes are as high as 36-40 km s(-1). Our analysis of the infrared and submillimeter data indicates that AGAL337.9-S is in an early evolutionary stage of high-mass star formation, having the total far-infrared luminosity of similar to 5 x 10(4) L-circle dot. We also found that another dust core, AGAL G337.922-00.456 (AGAL337.9-N), located 2' north of AGAL337.9-S, is a high-mass YSO in an earlier evolutionary stage than AGAL337.9-S, as it is less bright in the mid-infrared than AGAL337.9-S.

    DOI: 10.3847/1538-4357/aa6fa8

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  108. HI, CO, and Dust in the Perseus Cloud Reviewed

    Ryuji Okamoto, Hiroaki Yamamoto, Kengo Tachihara, Takahiro Hayakawa, Katsuhiro Hayashi, Yasuo Fukui

    ASTROPHYSICAL JOURNAL   Vol. 838 ( 2 )   2017.4

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    Comparison analyses between the gas emission data (H I 21 cm line and CO 2.6mm line) and the Planck/ IRAS dust emission data (optical depth at 353 GHz t353 and dust temperature T-d) allow us to estimate the amount and distribution of the hydrogen gas more accurately, and our previous studies revealed the existence of a large amount of optically thick H I gas in the solar neighborhood. Referring to this, we discuss the neutral hydrogen gas around the Perseus cloud in the present paper. By using the J-band extinction data, we found that t353 increases as a function of the 1.3th power of column number density of the total hydrogen (N-H), and this implies dust evolution in high density regions. This calibrated tau 353-N-H relationship shows that the amount of the H I gas can be underestimated to be similar to 60% if the optically thin H I method is used. Based on this relationship, we calculated the optical depth of the 21 cm line (tau(H) I) and found that &lt;tau(H) I &gt; similar to 0.92 around the molecular cloud. The effect of tH I is still significant, even if we take into account the dust evolution. We also estimated a spatial distribution of the CO-to-H-2 conversion factor (X-CO), and we found its average value is &lt; X-CO &gt; similar to 1.0 X 10(20) cm(-2) K(-1)Km(-1)s 20 2 1 1. Although these results are inconsistent with some previous studies, these discrepancies can be well explained by the difference of the data and analyses methods.

    DOI: 10.3847/1538-4357/aa6747

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  109. The Rotation Period Distributions of 4-10 Myr T Tauri Stars in Orion OB1: New Constraints on Pre-main-sequence Angular Momentum Evolution Reviewed

    Karim, M. T., Stassun, K. G., Briceño, C., Vivas, A. K., Raetz, S., Mateu, C., José; Downes, J., Calvet, N., Hern&aacute;ndez, J., Neuhäser, R., Mugrauer, M., Takahashi, H., Tachihara, K., Chini, R., Cruz-Dias, G. A., Aarnio, A., James, D. J., and Hackstein, M.

    The Astronomical Journal   Vol. 152 ( 1 ) page: 198   2016.12

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    DOI: 10.3847/0004-6256/152/6/198

  110. Revealing a Detailed Mass Distribution of a High-density Core MC27/L1521F in Taurus with ALMA Reviewed

    Tokuda, K., Onishi, T., Matsumoto, T., Saigo, K., Kawamura, A., Fukui, Y., Inutsuka, S.-i., Machida, M. N., Tomida, K., Tachihara, K., & André, P.

    The Astrophysical Journal   Vol. 826 ( 1 ) page: 26   2016.7

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    DOI: 10.3847/0004-637X/826/1/26

  111. The Two Molecular Clouds in RCW 38: Evidence for the Formation of the Youngest Super Star Cluster in the Milky Way Triggered by Cloud-Cloud Collision Reviewed

    Fukui, Y.; Torii, K.; Ohama, A.; Hasegawa, K.; Hattori, Y.; Sano, H.; Ohashi, S.; Fujii, K.; Kuwahara, S.; Mizuno, N.; Dawson, J. R.; Yamamoto, H.; Tachihara, K.; Okuda, T.; Onishi, T.; Mizuno, A.

    The Astrophysical Journal   Vol. 820 ( 1 ) page: 26   2016.3

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    DOI: 10.3847/0004-637X/820/1/26

  112. Witnessing molecular cloud formation from HI gas in high-latitude clouds Reviewed

    Tachihara, Kengo; Hattori, Momo; Yamamoto, Hiroaki; Okamoto, Ryuji; Hayakawa, Takahiro; Fukui, Yasuo

    IAU General Assembly, Meeting #29     page: id.2258299   2015.8

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  113. HIGH-MASS STAR FORMATION TRIGGERED BY COLLISION BETWEEN CO FILAMENTS IN N159 WEST IN THE LARGE MAGELLANIC CLOUD Reviewed

    Fukui Yasuo, Harada Ryohei, Tokuda Kazuki, Morioka Yuuki, Onishi Toshikazu, Torii Kazufumi, Ohama Akio, Hattori Yusuke, Nayak Omnarayani, Meixner Margaret, Sewilo Marta, Indebetouw Remy, Kawamura Akiko, Saigo Kazuya, Yamamoto Hiroaki, Tachihara Kengo, Minamidani Tetsuhiro, Inoue Tsuyoshi, Madden Suzanna, Galametz Maud, Lebouteiller Vianney, Mizuno Norikazu, Chen C. -H. Rosie

    ASTROPHYSICAL JOURNAL LETTERS   Vol. 807 ( 1 )   2015.7

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    DOI: 10.1088/2041-8205/807/1/L4

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  114. CLOUD-CLOUD COLLISION AS A TRIGGER OF THE HIGH-MASS STAR FORMATION: A MOLECULAR LINE STUDY IN RCW 120 Reviewed

    Torii K., Hasegawa K., Hattori Y., Sano H., Ohama A., Yamamoto H., Tachihara K., Soga S., Shimizu S., Okuda T., Mizuno N., Onishi T., Mizuno A., Fukui Y.

    ASTROPHYSICAL JOURNAL   Vol. 806 ( 1 )   2015.6

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    DOI: 10.1088/0004-637X/806/1/7

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  115. A DETAILED STUDY OF NON-THERMAL X-RAY PROPERTIES AND INTERSTELLAR GAS TOWARD THE gamma-RAY SUPERNOVA REMNANT RX J1713.7-3946 Reviewed

    Sano H., Fukuda T., Yoshiike S., Sato J., Horachi H., Kuwahara T., Torii K., Hayakawa T., Tanaka T., Matsumoto H., Inoue T., Yamazaki R., Inutsuka S., Kawamura A., Yamamoto H., Okuda T., Tachihara K., Mizuno N., Onishi T., Mizuno A., Acero F., Fukui Y.

    ASTROPHYSICAL JOURNAL   Vol. 799 ( 2 )   2015.2

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    DOI: 10.1088/0004-637X/799/2/175

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  116. OPTICALLY THICK Hi DOMINANT IN THE LOCAL INTERSTELLAR MEDIUM: AN ALTERNATIVE INTERPRETATION TO "DARK GAS" Reviewed

    Fukui Y., Torii K., Onishi T., Yamamoto H., Okamoto R., Hayakawa T., Tachihara K., Sano H.

    ASTROPHYSICAL JOURNAL   Vol. 798 ( 1 )   2015.1

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    DOI: 10.1088/0004-637X/798/1/6

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  117. Hi, CO, AND PLANCK/IRAS DUST PROPERTIES IN THE HIGH LATITUDE CLOUD COMPLEX, MBM 53, 54, 55 AND HLCG 92-35. POSSIBLE EVIDENCE FOR AN OPTICALLY THICK Hi ENVELOPE AROUND THE CO CLOUDS Reviewed

    Fukui Yasuo, Okamoto Ryuji, Kaji Ryohei, Yamamoto Hiroaki, Torii Kazufumi, Hayakawa Takahiro, Tachihara Kengo, Dickey John M., Okuda Takeshi, Ohama Akio, Kuroda Yutaka, Kuwahara Toshihisa

    ASTROPHYSICAL JOURNAL   Vol. 796 ( 1 )   2014.11

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    DOI: 10.1088/0004-637X/796/1/59

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  118. COMPARISON OF PRESTELLAR CORE ELONGATIONS AND LARGE- SCALE MOLECULAR CLOUD STRUCTURES IN THE LUPUS I REGION Reviewed

    Poidevin Frederick, Ade Peter A. R., Angile Francesco E., Benton Steven J., Chapin Edward L., Devlin Mark J., Fissel Laura M., Fukui Yasuo, Gandilo Natalie N., Gundersen Joshua O., Hargrave Peter C., Klein Jeffrey, Korotkov Andrei L., Matthews Tristan G., Moncelsi Lorenzo, Mroczkowski Tony K., Netterfield Calvin B., Novak Giles, Nutter David, Olmi Luca, Pascale Enzo, Savini Giorgio, Scott Douglas, Shariff Jamil A., Soler Juan Diego, Tachihara Kengo, Thomas Nicholas E., Truch Matthew D. P., Tucker Carole E., Tucker Gregory S., Ward-Thompson Derek

    ASTROPHYSICAL JOURNAL   Vol. 791 ( 1 )   2014.8

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    DOI: 10.1088/0004-637X/791/1/43

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  119. ALMA OBSERVATIONS OF A HIGH-DENSITY CORE IN TAURUS: DYNAMICAL GAS INTERACTION AT THE POSSIBLE SITE OF A MULTIPLE STAR FORMATION Reviewed

    Tokuda Kazuki, Onishi Toshikazu, Saigo Kazuya, Kawamura Akiko, Fukui Yasuo, Matsumoto Tomoaki, Inutsuka Shu-ichiro, Machida Masahiro N., Tomida Kengo, Tachihara Kengo

    ASTROPHYSICAL JOURNAL LETTERS   Vol. 789 ( 1 )   2014.7

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    DOI: 10.1088/2041-8205/789/1/L4

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  120. LUPUS I OBSERVATIONS FROM THE 2010 FLIGHT OF THE BALLOON-BORNE LARGE APERTURE SUBMILLIMETER TELESCOPE FOR POLARIMETRY Reviewed

    Matthews Tristan G., Ade Peter A. R., Angile Francesco E., Benton Steven J., Chapin Edward L., Chapman Nicholas L., Devlin Mark J., Fissel Laura M., Fukui Yasuo, Gandilo Natalie N., Gundersen Joshua O., Hargrave Peter C., Klein Jeffrey, Korotkov Andrei L., Moncelsi Lorenzo, Mroczkowski Tony K., Netterfield Calvin B., Novak Giles, Nutter David, Olmi Luca, Pascale Enzo, Poidevin Frederick, Savini Giorgio, Scott Douglas, Shariff Jamil A., Soler Juan Diego, Tachihara Kengo, Thomas Nicholas E., Truch Matthew D. P., Tucker Carole E., Tucker Gregory S., Ward-Thompson Derek

    ASTROPHYSICAL JOURNAL   Vol. 784 ( 2 )   2014.4

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    DOI: 10.1088/0004-637X/784/2/116

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  121. Unusually bright (CO)-C-12(3-2) condensations in the tidally perturbed Small Magellanic Cloud "tail" Reviewed

    Muller Erik, Mizuno Norikazu, Minamidani Tetsuhiro, Kawamura Akiko, Chen C. -H. Rosie, Indebetouw Remy, Enokiya Rei, Fukui Yasuo, Gordon Karl, Hayakawa Takahiro, Mizuno Yoji, Murai Miyuki, Okuda Takeshi, Onishi Toshikazu, Tachihara Kengo, Takekoshi Tatsuya, Yamamoto Hiroaki, Yoshiike Satoshi

    PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN   Vol. 66 ( 1 )   2014.2

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    DOI: 10.1093/pasj/pst006

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  122. NON-THERMAL X-RAYS AND INTERSTELLAR GAS TOWARD THE gamma-RAY SUPERNOVA REMNANT RX J1713.7-3946: EVIDENCE FOR X-RAY ENHANCEMENT AROUND CO AND H I CLUMPS Reviewed

    Sano H., Tanaka T., Torii K., Fukuda T., Yoshiike S., Sato J., Horachi H., Kuwahara T., Hayakawa T., Matsumoto H., Inoue T., Yamazaki R., Inutsuka S., Kawamura A., Tachihara K., Yamamoto H., Okuda T., Mizuno N., Onishi T., Mizuno A., Fukui Y.

    ASTROPHYSICAL JOURNAL   Vol. 778 ( 1 )   2013.11

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    DOI: 10.1088/0004-637X/778/1/59

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  123. Unveiling the gas-and-dust disk structure in HD 163296 using ALMA observations Reviewed

    de Gregorio-Monsalvo I., Menard F., Dent W., Pinte C., Lopez C., Klaassen P., Hales A., Cortes P., Rawlings M. G., Tachihara K., Testi L., Takahashi S., Chapillon E., Mathews G., Juhasz A., Akiyama E., Higuchi A. E., Saito M., Nyman L. -A., Phillips N., Rodon J., Corder S., Van Kempen T.

    ASTRONOMY & ASTROPHYSICS   Vol. 557   2013.9

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    DOI: 10.1051/0004-6361/201321603

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  124. Multi-site campaign for transit timing variations of WASP-12 b: possible detection of a long-period signal of planetary origin Reviewed

    Maciejewski G., Dimitrov D., Seeliger M., Raetz St, Bukowiecki L., Kitze M., Errmann R., Nowak G., Niedzielski A., Popov V., Marka C., Gozdziewski K., Neuhauser R., Ohlert J., Hinse T. C., Lee J. W., Lee C. -U., Yoon J. -N., Berndt A., Gilbert H., Ginski Ch, Hohle M. M., Mugrauer M., Roell T., Schmidt T. O. B., Tetzlaff N., Mancini L., Southworth J., Dall'Ora M., Ciceri S., Zambelli R., Corfini G., Takahashi H., Tachihara K., Benko J. M., Sarneczky K., Szabo Gy M., Varga T. N., Vanko M., Joshi Y. C., Chen W. P.

    ASTRONOMY & ASTROPHYSICS   Vol. 551   2013.3

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    DOI: 10.1051/0004-6361/201220739

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  125. GIANT MOLECULAR CLOUDS AND STAR FORMATION IN THE TIDAL MOLECULAR ARM OF NGC 4039 Reviewed

    Espada D., Komugi S., Muller E., Nakanishi K., Saito M., Tatematsu K., Iguchi S., Hasegawa T., Mizuno N., Iono D., Matsushita S., Trejo A., Chapillon E., Takahashi S., Su Y. N., Kawamura A., Akiyama E., Hiramatsu M., Nagai H., Miura R. E., Kurono Y., Sawada T., Higuchi A. E., Tachihara K., Saigo K., Kamazaki T.

    ASTROPHYSICAL JOURNAL LETTERS   Vol. 760 ( 2 )   2012.12

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    DOI: 10.1088/2041-8205/760/2/L25

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  126. The first ALMA view of IRAS 16293-2422 Direct detection of infall onto source B and high-resolution kinematics of source A Reviewed

    Pineda J. E., Maury A. J., Fuller G. A., Testi L., Garcia-Appadoo D., Peck A. B., Villard E., Corder S. A., van Kempen T. A., Turner J. L., Tachihara K., Dent W.

    ASTRONOMY & ASTROPHYSICS   Vol. 544   2012.8

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    DOI: 10.1051/0004-6361/201219589

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  127. THE MOLECULAR OUTFLOWS IN THE rho OPHIUCHI MAIN CLOUD: IMPLICATIONS FOR TURBULENCE GENERATION (vol 726, pg 46, 2011) Reviewed

    Nakamura Fumitaka, Kamada Yuhei, Kamazaki Takeshi, Kawabe Ryohei, Kitamura Yoshimi, Shimajiri Yoshito, Tsukagoshi Takashi, Tachihara Kengo, Akashi Toshiya, Azegami Kenta, Ikeda Norio, Kurono Yasutaka, Li Zhi-Yun, Miura Tomoya, Nishi Ryoichi, Umemoto Tomofumi

    ASTROPHYSICAL JOURNAL   Vol. 750 ( 2 )   2012.5

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    DOI: 10.1088/0004-637X/750/2/174

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  128. The Young Exoplanet Transit Initiative (YETI) Reviewed

    Neuhaeuser R., Errmann R., Berndt A., Maciejewski G., Takahashi H., Chen W. P., Dimitrov D. P., Pribulla T., Nikogossian E. H., Jensen E. L. N., Marschall L., Wu Z. -Y., Kellerer A., Walter F. M., Briceno C., Chini R., Fernandez M., Raetz St, Torres G., Latham D. W., Quinn S. N., Niedzielski A., Bukowiecki L., Nowak G., Tomov T., Tachihara K., Hu S. C. -L., Hung L. W., Kjurkchieva D. P., Radeva V. S., Mihov B. M., Slavcheva-Mihova L., Bozhinova I. N., Budaj J., Vanko M., Kundra E., Hambalek L., Krushevska V., Movsessian T., Harutyunyan H., Downes J. J., Hernandez J., Hoffmeister V. H., Cohen D. H., Abel I., Ahmad R., Chapman S., Eckert S., Goodman J., Guerard A., Kim H. M., Koontharana A., Sokol J., Trinh J., Wang Y., Zhou X., Redmer R., Kramm U., Nettelmann N., Mugrauer M., Schmidt J., Moualla M., Ginski C., Marka C., Adam C., Seeliger M., Baar S., Roell T., Schmidt T. O. B., Trepl L., Eisenbeiss T., Fiedler S., Tetzlaff N., Schmidt E., Hohle M. M., Kitze M., Chakrova N., Graefe C., Schreyer K., Hambaryan V. V., Broeg C. H., Koppenhoefer J., Pandey A. K.

    ASTRONOMISCHE NACHRICHTEN   Vol. 332 ( 6 ) page: 547-561   2011.7

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    DOI: 10.1002/asna.201111573

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  129. Transit timing variation and activity in the WASP-10 planetary system star Reviewed

    Maciejewski G., Dimitrov D., Neuhauser R., Tetzlaff N., Niedzielski A., Raetz St., Chen W. P., Walter F., Marka C., Baar S., Krejcova T., Budaj J., Krushevska V., Tachihara K., Takahashi H., Mugrauer M.

    MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY   Vol. 411 ( 2 ) page: 1204-1212   2011.2

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    DOI: 10.1111/j.1365-2966.2010.17753.x

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  130. THE MOLECULAR OUTFLOWS IN THE rho OPHIUCHI MAIN CLOUD: IMPLICATIONS FOR TURBULENCE GENERATION Reviewed

    Nakamura Fumitaka, Kamada Yuhei, Kamazaki Takeshi, Kawabe Ryohei, Kitamura Yoshimi, Shimajiri Yoshito, Tsukagoshi Takashi, Tachihara Kengo, Akashi Toshiya, Azegami Kenta, Ikeda Norio, Kurono Yasutaka, Li Zhi-Yun, Miura Tomoya, Nishi Ryoichi, Umemoto Tomofumi

    ASTROPHYSICAL JOURNAL   Vol. 726 ( 1 )   2011.1

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    DOI: 10.1088/0004-637X/726/1/46

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  131. Millimeter-wave survey of molecular clouds around the W5-East triggered star-forming region Reviewed

    Niwa T., Tachihara K., Itoh Y., Oasa Y., Sunada K., Sugitani K., Mukai T.

    ASTRONOMY & ASTROPHYSICS   Vol. 500 ( 3 ) page: 1119-1129   2009.6

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    DOI: 10.1051/0004-6361/200811065

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  132. Imaging galactic diffuse clouds: CO emission, reddening and turbulent flow in the gas around zeta Ophiuchi Reviewed

    Liszt H. S., Pety J., Tachihara K.

    ASTRONOMY & ASTROPHYSICS   Vol. 499 ( 2 ) page: 503-513   2009.5

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    DOI: 10.1051/0004-6361:200810905

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  133. Search for Remnant Clouds Associated with the TW Hya Association Reviewed

    Tachihara Kengo, Neuhaeuser Ralph, Fukui Yasuo

    PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN   Vol. 61 ( 3 ) page: 585-591   2009

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  134. Gas and dust condensations and a peculiar Class 0 object in the Lupus 3 star-forming cloud Reviewed

    Tachihara K., Rengel M., Andre P., Neuhaeuser R., Onishi T., Fukui Y., Mizuno A.

    ASTROPHYSICAL JOURNAL   Vol. 659 ( 2 ) page: 1382-1393   2007.4

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  135. Simultaneous X-ray, radio, near-infrared, and optical monitoring of Young Stellar Objects in the Coronet cluster Reviewed

    Forbrich J., Preibisch Th., Menten K. M., Neuhaeuser R., Walter F. M., Tamura M., Matsunaga N., Kusakabe N., Nakajima Y., Brandeker A., Fornasier S., Posselt B., Tachihara K., Broeg C.

    ASTRONOMY & ASTROPHYSICS   Vol. 464 ( 3 ) page: 1003-1013   2007.3

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    DOI: 10.1051/0004-6361:20066158

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  136. Large-scale CO observations of a far-infrared loop in pegasus: Detection of a large number of very small molecular clouds possibly formed via shocks Reviewed

    Yamamoto H, Kawamura A, Tachihara K, Mizuno N, Onishi T, Fukui Y

    ASTROPHYSICAL JOURNAL   Vol. 642 ( 1 ) page: 307-318   2006.5

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  137. Search for new T tauri stars in the Cepheus-Cassiopeia region Reviewed

    Tachihara K, Neuhauser R, Kun M, Fukui Y

    ASTRONOMY & ASTROPHYSICS   Vol. 437 ( 3 ) page: 919-928   2005.7

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    DOI: 10.1051/0004-6361:20042197

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  138. Dense cores and protostellar collapse in nearby star-forming regions Reviewed

    Yamamoto H, Onishi T, Tachihara K, Mizuno A, Fukui Y

    BALTIC ASTRONOMY   Vol. 13 ( 3 ) page: 424-429   2004

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  139. Proper motion and X-ray selected search for new members of the young TW Hya association Reviewed

    Tachihara K, Neuhauser R, Frink S, Guenther E

    ASTRONOMISCHE NACHRICHTEN   Vol. 324 ( 6 ) page: 543-551   2003

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    DOI: 10.1002/asna.200310168

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  140. A complete search for dense cloud cores in Taurus Reviewed

    Onishi T, Mizuno A, Kawamura A, Tachihara K, Fukui Y

    ASTROPHYSICAL JOURNAL   Vol. 575 ( 2 ) page: 950-973   2002.8

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  141. Statistical study of (CO)-O-18 dense cloud cores and star formation Reviewed

    Tachihara K, Onishi T, Mizuno A, Fukui Y

    ASTRONOMY & ASTROPHYSICS   Vol. 385 ( 3 ) page: 909-920   2002.4

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    DOI: 10.1051/0004-6361:20020180

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  142. Statistical study of nearby dense cores and their modes of star formation Reviewed

    Tachihara K, Onishi T, Hara A, Mizuno A, Fukui Y

    MODES OF STAR FORMATION AND THE ORIGIN OF FIELD POPULATIONS, PROCEEDINGS   Vol. 285   page: 34-39   2002

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  143. Search for T Tauri stars in the Cepheus-Cassiopeia region Reviewed

    Tachihara K, Neuhauser R, Voges W, Konig B, Yonekura Y, Yasuo F

    NEW CENTURY OF X-RAY ASTRONOMY   Vol. 251   page: 280-281   2001

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  144. (CO)-C-12 molecular cloud survey and global star formation in Lupus Reviewed

    Tachihara K, Toyoda S, Onishi T, Mizuno A, Fukui Y, Neuhauser R

    PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN   Vol. 53 ( 6 ) page: 1081-1096   2001

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  145. A large scale (CO)-C-12 (J=1-0) survey toward the Chamaeleon region with NANTEN Reviewed

    Mizuno A, Yamaguchi R, Tachihara K, Toyoda S, Aoyama H, Yamamoto H, Onishi T, Fukui Y

    PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN   Vol. 53 ( 6 ) page: 1071-1080   2001

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  146. Statistical study of dense cores in nearby star forming regions Reviewed

    Tachihara K, Hara A, Onishi T, Mizuno A, Fukui Y, Obayashi A, Yonekura Y

    FROM DARKNESS TO LIGHT: ORIGIN AND EVOLUTION OF YOUNG STELLAR CLUSTERS   Vol. 243   page: 125-130   2001

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  147. (CO)-O-18 observations of the dense cloud cores and star formation in Ophiuchus Reviewed

    Tachihara K, Mizuno A, Fukui Y

    ASTROPHYSICAL JOURNAL   Vol. 528 ( 2 ) page: 817-840   2000.1

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  148. Molecular clouds around zeta Oph: Evidence of dynamical interaction of molecular clouds and the O star Reviewed

    Tachihara K, Abe R, Onishi T, Mizuno A, Fukui Y

    33RD ESLAB SYMPOSIUM ON STAR FORMATION FROM THE SMALL TO THE LARGE SCALE   Vol. 445   page: 523-526   2000

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  149. Molecular clouds around a runaway O star, zeta Ophiuchi Reviewed

    Tachihara K, Abe R, Onishi T, Mizuno A, Fukui Y

    PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN   Vol. 52 ( 6 ) page: 1147-+   2000

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  150. Dense cores and star-formation activities in the Chamaeleon dark-cloud complex Reviewed

    Mizuno A, Hayakawa T, Tachihara K, Onishi T, Yonekura Y, Yamaguchi N, Kato S, Hara A, Mizuno N, Kawamura A, Abe R, Saito H, Yamaguchi R, Ogawa H, Fukui Y

    PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN   Vol. 51 ( 6 ) page: 859-+   1999

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  151. A study of the molecular cloud toward the HII regions S 35 and S 37 with NANTEN Reviewed

    Saito H, Tachihara K, Onishi T, Yamaguchi N, Mizuno N, Ogawa H, Fukui Y

    PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN   Vol. 51 ( 6 ) page: 819-835   1999

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

    Web of Science

  152. Molecular clouds in the LMC observed with NANTEN: III. Comparison with HII regions Reviewed

    Abe R, Hara A, Hayakawa T, Kato S, Kawamura A, Mizuno A, Mizuno N, Ogawa H, Onishi T, Saito H, Tachihara K, Xiao KC, Yamaguchi N, Yamaguchi R, Fukui Y, Yonekura Y

    NEW VIEWS OF THE MAGELLANIC CLOUDS   ( 190 ) page: 130-131   1999

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

    Web of Science

  153. Molecular clouds in the LMC observed with NANTEN II. Comparison with stellar clusters Reviewed

    Yamaguchi R, Abe R, Hara A, Hayakawa T, Kato S, Kawamura A, Mizuno A, Mizuno N, Ogawa H, Onishi T, Saito H, Tachihara K, Xiao KC, Yamaguchi N, Fukui Y, Yonekura Y

    NEW VIEWS OF THE MAGELLANIC CLOUDS   ( 190 ) page: 150-151   1999

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

    Web of Science

  154. First results of a CO survey of the Large Magellanic Cloud with NANTEN; Giant molecular clouds as formation sites of populous clusters Reviewed

    Fukui Y, Mizuno N, Yamaguchi R, Mizuno A, Onishi T, Ogawa H, Yonekura Y, Kawamura A, Tachihara K, Xiao KC, Yamaguchi N, Hara A, Hayakawa T, Kato S, Abe R, Saito H, Mano S, Matsunaga K, Mine Y, Moriguchi Y, Aoyama H, Asayama S, Yoshikawa N, Rubio M

    PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN   Vol. 51 ( 6 ) page: 745-+   1999

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

    Web of Science

  155. A (CO)-C-12 survey of the LMC with NANTEN Reviewed

    Fukui Y, Abe R, Hara A, Hayakawa T, Kato S, Kawamura A, Mizuno A, Mizuno N, Ogawa H, Onishi T, Saito H, Tachihara K, Xiao KC, Yamaguchi N, Yamaguchi R, Yonekura Y, Rubio M

    NEW VIEWS OF THE MAGELLANIC CLOUDS   ( 190 ) page: 61-66   1999

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

    Web of Science

  156. Molecular clouds in the LMC observed with NANTEN I. Physical properties of the clouds Reviewed

    Mizuno N, Abe R, Hara A, Hayakawa T, Kato S, Kawamura A, Mizuno A, Ogawa H, Onishi T, Saito H, Tachihara K, Xiao KC, Yamaguchi N, Yamaguchi R, Fukui Y, Yonekura Y

    NEW VIEWS OF THE MAGELLANIC CLOUDS   ( 190 ) page: 120-121   1999

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

    Web of Science

  157. Molecular clouds in the LMC observed with NANTEN: IV. Comparison with SNRs Reviewed

    Saito H, Abe R, Hara A, Hayakawa T, Kato S, Kawamura A, Mizuno A, Mizuno N, Ogawa H, Onishi T, Tachihara K, Xiao KC, Yamaguchi N, Yamaguchi R, Fukui Y, Yonekura Y

    NEW VIEWS OF THE MAGELLANIC CLOUDS   ( 190 ) page: 148-149   1999

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

    Web of Science

  158. Discovery of the Carina flare with NANTEN; Evidence for a supershell that triggered the formation of stars and massive molecular clouds Reviewed

    Fukui Y, Onishi T, Abe R, Kawamura A, Tachihara K, Yamaguchi R, Mizuno A, Ogawa H

    PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN   Vol. 51 ( 6 ) page: 751-+   1999

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

    Web of Science

  159. A study of dense cloud cores and star formation in Lupus: (CO)-O-18 J=1-0 observations with NANTEN Reviewed

    Hara A, Tachihara K, Mizuno A, Onishi T, Kawamura A, Obayashi A, Fukui Y

    PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN   Vol. 51 ( 6 ) page: 895-910   1999

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

    Web of Science

  160. A (CO)-C-13 (J=1-0) search for small molecular clouds toward the Chamaeleon-Musca Dark Cloud Complex Reviewed

    Mizuno A, Hayakawa T, Yamaguchi N, Kato S, Hara A, Mizuno N, Yonekura Y, Onishi T, Kawamura A, Tachihara K, Obayashi A, Xiao KC, Ogawa H, Fukui Y

    ASTROPHYSICAL JOURNAL   Vol. 507 ( 1 ) page: L83-L87   1998.11

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

    Web of Science

  161. Clustering of pre-main-sequence stars in the Orion, Ophiuchus, Chamaeleon, Vela, and Lupus star-forming regions Reviewed

    Nakajima Y, Tachihara K, Hanawa T, Nakano M

    ASTROPHYSICAL JOURNAL   Vol. 497 ( 2 ) page: 721-735   1998.4

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

    Web of Science

  162. A large-scale (CO)-C-13 distribution of the galaxy - A global view of star forming clouds Reviewed

    Tachihara K, Yonekura Y, Kawamura A, Mizuno A, Ogawa H, Fukui Y

    IMPACT OF LARGE SCALE NEAR-IR SKY SURVEYS   Vol. 210   page: 119-126   1997

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    Authorship:Lead author   Language:English   Publishing type:Research paper (international conference proceedings)  

    Web of Science

  163. (CO)-C-13 (J=1-0) observations of the Lupus molecular clouds Reviewed

    Tachihara K, Dobashi K, Mizuno A, Ogawa H, Fukui Y

    PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN   Vol. 48 ( 3 ) page: 489-502   1996

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

    Web of Science

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Books 2

  1. 地球生命誕生の謎: カラー図解 アストロバイオロジー Reviewed

    M. ガルゴー 他( Role: Joint translator ,  第1章)

    西村書店  2021.6  ( ISBN:4867060194

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    Total pages:221   Language:Japanese Book type:Textbook, survey, introduction

  2. スーパー望遠鏡「アルマ」が見た宇宙

    福井康雄, 水野範和, 谷口義明, 立原研悟, 坂井南美( Role: Joint author)

    日本評論社  2016.9  ( ISBN:978-4-535-78774-2

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    Total pages:203   Language:Japanese Book type:General book, introductory book for general audience

    Other Link: https://www.amazon.co.jp/dp/4535787743/

MISC 4

  1. Triggered O Star Formation in M20 via Cloud-Cloud Collision: Comparisons between High-resolution CO Observations and Simulations

    K. Torii, Y. Hattori, K. Hasegawa, A. Ohama, T. J. Haworth, K. Shima, A. Habe, K. Tachihara, N. Mizuno, T. Onishi, A. Mizuno, Y. Fukui

    ASTROPHYSICAL JOURNAL   Vol. 835 ( 2 )   2017.2

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    Language:English   Publishing type:Rapid communication, short report, research note, etc. (scientific journal)   Publisher:IOP PUBLISHING LTD  

    Understanding high-mass star formation is one of the top-priority issues in astrophysics. Recent observational studies have revealed that cloud-cloud collisions may play a role in high-mass star formation in several places in the Milky Way and the Large Magellanic Cloud. The Trifid Nebula M20 is a well-known Galactic H II region ionized by a single O7.5 star. In 2011, based on the CO observations with NANTEN2, we reported that the O star was formed by the collision between two molecular clouds similar to 0.3 Myr ago. Those observations identified two molecular clouds toward M20, traveling at a relative velocity of 7.5 km s(-1). This velocity separation implies that the clouds cannot be gravitationally bound to M20, but since the clouds show signs of heating by the stars there they must be spatially coincident with it. A collision is therefore highly possible. In this paper we present the new CO J = 1-0 and J = 3-2 observations of the colliding clouds in M20 performed with the Mopra and ASTE telescopes. The high-resolution observations revealed that the two molecular clouds have peculiar spatial and velocity structures, i.e., a spatially complementary distribution between the two clouds and a bridge feature that connects the two clouds in velocity space. Based on a new comparison with numerical models, we find that this complementary distribution is an expected outcome of cloud-cloud collisions, and that the bridge feature can be interpreted as the turbulent gas excited at the interface of the collision. Our results reinforce the cloud-cloud collision scenario in M20.

    DOI: 10.3847/1538-4357/835/2/142

    Web of Science

  2. Triggered O Star Formation in M20 via Cloud-Cloud Collision: Comparisons between High-resolution CO Observations and Simulations Reviewed

    K. Torii, Y. Hattori, K. Hasegawa, A. Ohama, T. J. Haworth, K. Shima, A. Habe, K. Tachihara, N. Mizuno, T. Onishi, A. Mizuno, Y. Fukui

    ASTROPHYSICAL JOURNAL   Vol. 835 ( 2 ) page: 142   2017.2

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    Language:English   Publishing type:Rapid communication, short report, research note, etc. (scientific journal)   Publisher:IOP PUBLISHING LTD  

    Understanding high-mass star formation is one of the top-priority issues in astrophysics. Recent observational studies have revealed that cloud-cloud collisions may play a role in high-mass star formation in several places in the Milky Way and the Large Magellanic Cloud. The Trifid Nebula M20 is a well-known Galactic H II region ionized by a single O7.5 star. In 2011, based on the CO observations with NANTEN2, we reported that the O star was formed by the collision between two molecular clouds similar to 0.3 Myr ago. Those observations identified two molecular clouds toward M20, traveling at a relative velocity of 7.5 km s(-1). This velocity separation implies that the clouds cannot be gravitationally bound to M20, but since the clouds show signs of heating by the stars there they must be spatially coincident with it. A collision is therefore highly possible. In this paper we present the new CO J = 1-0 and J = 3-2 observations of the colliding clouds in M20 performed with the Mopra and ASTE telescopes. The high-resolution observations revealed that the two molecular clouds have peculiar spatial and velocity structures, i.e., a spatially complementary distribution between the two clouds and a bridge feature that connects the two clouds in velocity space. Based on a new comparison with numerical models, we find that this complementary distribution is an expected outcome of cloud-cloud collisions, and that the bridge feature can be interpreted as the turbulent gas excited at the interface of the collision. Our results reinforce the cloud-cloud collision scenario in M20.

    DOI: 10.3847/1538-4357/835/2/142

    Web of Science

  3. KINEMATIC STRUCTURE OF MOLECULAR GAS AROUND HIGH-MASS YSO, PAPILLON NEBULA, IN N159 EAST IN THE LARGE MAGELLANIC CLOUD: A NEW PERSPECTIVE WITH ALMA

    Kazuya Saigo, Toshikazu Onishi, Omnarayani Nayak, Margaret Meixner, Kazuki Tokuda, Ryohei Harada, Yuuki Morioka, Marta Sewilo, Remy Indebetouw, Kazufumi Torii, Akiko Kawamura, Akio Ohama, Yusuke Hattori, Hiroaki Yamamoto, Kengo Tachihara, Tetsuhiro Minamidani, Tsuyoshi Inoue, Suzanne Madden, Maud Galametz, Vianney Lebouteiller, C. -H. Rosie Chen, Norikazu Mizuno, Yasuo Fukui

    ASTROPHYSICAL JOURNAL   Vol. 835 ( 1 )   2017.1

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    Language:English   Publishing type:Rapid communication, short report, research note, etc. (scientific journal)   Publisher:IOP PUBLISHING LTD  

    We present the ALMA Band 3 and Band 6 results of 12CO(2-1), (CO)-C-13(2-1), H30 alpha recombination line, free-free emission around 98 GHz, and the dust thermal emission around 230 GHz toward the N159 East Giant Molecular Cloud (N159E) in the Large Magellanic Cloud (LMC). LMC is the nearest active high-mass star-forming face-on galaxy at a distance of. 50 kpc and is the best target for studing high-mass star formation. ALMA observations show that N159E is the complex of filamentary clouds with the width and length of similar to 1 pc and several parsecs. The total molecular mass is 0.92 x 10(5)M(circle dot) from the (CO)-C-13(2-1) intensity. N159E harbors the well-known Papillon Nebula, a compact high-excitation H II region. We found that a YSO associated with the Papillon Nebula has the mass of 35M(circle dot) and is located at the intersection of three filamentary clouds. It indicates that the formation of the high-mass YSO was induced by the collision of filamentary clouds. Fukui et al. reported a similar kinematic structure toward two YSOs in the N159 West region, which are the other YSOs that have the mass of &gt;= 35M(circle dot). This suggests that the collision of filamentary clouds is a primary mechanism of high-mass star formation. We found a small molecular hole around the YSO in Papillon Nebula with a sub-parsec scale. It is filled by free-free and H30 alpha emission. The temperature of the molecular gas around the hole reaches similar to 80 K. It indicates that this YSO has just started the distruction of parental molecular cloud.

    DOI: 10.3847/1538-4357/835/1/108

    Web of Science

  4. KINEMATIC STRUCTURE OF MOLECULAR GAS AROUND HIGH-MASS YSO, PAPILLON NEBULA, IN N159 EAST IN THE LARGE MAGELLANIC CLOUD: A NEW PERSPECTIVE WITH ALMA Reviewed

    Kazuya Saigo, Toshikazu Onishi, Omnarayani Nayak, Margaret Meixner, Kazuki Tokuda, Ryohei Harada, Yuuki Morioka, Marta Sewilo, Remy Indebetouw, Kazufumi Torii, Akiko Kawamura, Akio Ohama, Yusuke Hattori, Hiroaki Yamamoto, Kengo Tachihara, Tetsuhiro Minamidani, Tsuyoshi Inoue, Suzanne Madden, Maud Galametz, Vianney Lebouteiller, C. -H. Rosie Chen, Norikazu Mizuno, Yasuo Fukui

    ASTROPHYSICAL JOURNAL   Vol. 835 ( 1 ) page: 108   2017.1

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    Language:English   Publishing type:Rapid communication, short report, research note, etc. (scientific journal)   Publisher:IOP PUBLISHING LTD  

    We present the ALMA Band 3 and Band 6 results of 12CO(2-1), (CO)-C-13(2-1), H30 alpha recombination line, free-free emission around 98 GHz, and the dust thermal emission around 230 GHz toward the N159 East Giant Molecular Cloud (N159E) in the Large Magellanic Cloud (LMC). LMC is the nearest active high-mass star-forming face-on galaxy at a distance of. 50 kpc and is the best target for studing high-mass star formation. ALMA observations show that N159E is the complex of filamentary clouds with the width and length of similar to 1 pc and several parsecs. The total molecular mass is 0.92 x 10(5)M(circle dot) from the (CO)-C-13(2-1) intensity. N159E harbors the well-known Papillon Nebula, a compact high-excitation H II region. We found that a YSO associated with the Papillon Nebula has the mass of 35M(circle dot) and is located at the intersection of three filamentary clouds. It indicates that the formation of the high-mass YSO was induced by the collision of filamentary clouds. Fukui et al. reported a similar kinematic structure toward two YSOs in the N159 West region, which are the other YSOs that have the mass of &gt;= 35M(circle dot). This suggests that the collision of filamentary clouds is a primary mechanism of high-mass star formation. We found a small molecular hole around the YSO in Papillon Nebula with a sub-parsec scale. It is filled by free-free and H30 alpha emission. The temperature of the molecular gas around the hole reaches similar to 80 K. It indicates that this YSO has just started the distruction of parental molecular cloud.

    DOI: 10.3847/1538-4357/835/1/108

    Web of Science

Presentations 12

  1. ガスと星の運動から探る誘発的星形成

    立原研悟

    研究会「分子雲衝突が駆動する巨大分子雲の進化と星形成」  2024.2.27 

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    Event date: 2024.2

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:名古屋大学   Country:Japan  

  2. Network of filamentary structures and cluster formation in Corona Australis revealed with ALMA International coauthorship International conference

    2023.12.6 

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    Event date: 2023.12

    Language:English   Presentation type:Poster presentation  

    Country:Chile  

  3. High-resolution study of dense cores in Taurus International coauthorship International conference

    Kengo Tachihara, Kazuki Tokuda, Yasuo Fukui, Sarolta Zahorecz, Kazuya Saigo, Tomoaki Matsumoto, Kengo Tomida, Masahiro N. Machida, Shu-ichiro Inutsuka, Philippe André, Akiko Kawamura, and Toshikazu Onishi

    Protostars and Planets VII  2023.4.10 

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    Event date: 2023.4

    Language:English   Presentation type:Poster presentation  

    Country:Japan  

  4. 大マゼラン雲における O 型星アソシエーションの形成

    立原研悟, 玉城磨生, 國生拓摩, 福井康雄, 柘植紀節

    日本天文学会秋季年会  2022.9.14  日本天文学会

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    Event date: 2022.9

    Presentation type:Oral presentation (general)  

    Venue:オンライン   Country:Japan  

  5. The Long Tails of the Pegasus-Pisces Arch Intermediate Velocity Cloud

    K. Tachihara, R.L. Shelton, M. Elliott Williams, M.C. Parker, J.E. Galyardt, T. Hayakawa1 & Y. Fukui

    2022.3.2 

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    Event date: 2022.3

    Language:English   Presentation type:Oral presentation (general)  

    Country:Japan  

  6. The NANTEN Galactic Plane Survey I : (Overview)

    2021.9.15 

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    Event date: 2021.9

    Language:Japanese   Presentation type:Oral presentation (general)  

  7. The effect of tidal interaction on the cloud properties and star formation in M51

    2021.7.7 

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    Event date: 2021.7

    Language:Japanese   Presentation type:Oral presentation (general)  

  8. ALMAでみた星間雲の内部構造と進化 Invited

    立原研悟

    (サブ)ミリ波単一鏡の革新で挑む, 天文学の未解決問題  2021.3.29 

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    Event date: 2021.3

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

    Venue:オンライン   Country:Japan  

  9. CI観測で探る分子雲の構造と進化

    立原研悟

    ALMA高周波バンドを用いた星形成研究を考える   2021.3.2 

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    Event date: 2021.3

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:オンライン   Country:Japan  

  10. SWG-2 活動報告 Invited

    立原研悟

    ngVLA Joint SubWG meeting  2020.12.4 

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    Event date: 2020.12

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:オンライン   Country:Japan  

  11. ALMA ACA サーベイで探る Corona Australis 領域の星形成 (1): 初期成果

    立原研悟, 山崎康正, 徳田一起, 藤城翔, 金井昂大, 大朝由美子, 西合一矢, 深川美里, 町田正博

    日本天文学会秋季年会  2020.9.9  日本天文学会

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    Event date: 2020.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:オンライン   Country:Japan  

  12. ngVLAによる高速度雲のHI観測

    立原研悟

    ngVLA Science Working Grou 第2回会合  2020.9.1 

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    Event date: 2020.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:オンライン   Country:Japan  

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Research Project for Joint Research, Competitive Funding, etc. 1

  1. 超広域電波観測による銀河系外分子ガス分布の解明 International coauthorship

    2022.7 - 2022.12

    山田科学振興財団  海外研究援助  グループA

    立原研悟

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    Authorship:Principal investigator  Grant type:Competitive

    Grant amount:\1000000 ( Direct Cost: \1000000 )

KAKENHI (Grants-in-Aid for Scientific Research) 7

  1. Exploring cosmic-ray diffusion processes through a detailed analysis of the ISM

    Grant number:24H00246  2024.4 - 2029.3

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

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    Authorship:Coinvestigator(s) 

  2. NANTEN2望遠鏡サブミリ波CI観測による超新星残骸ガンマ線起源の斬新な追究

    Grant number:22H00152  2022.4 - 2026.3

    科学研究費助成事業  基盤研究(A)

    福井 康雄, 佐野 栄俊, 立原 研悟

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    Authorship:Coinvestigator(s) 

    新たなサブミリ波受信機を開発しNANTEN2望遠鏡に搭載、中性炭素原子ガスの分布を広範囲で求める。これをCO分子輝線の結果と組み合わせ、COだけでは捉えきれない分子ガスの総量を求める方法を確立する。これを超新鮮残骸と相互作用する星間ガスの分子成分の定量法として用い、HI 21cm線スペクトルと合わせ、星間陽子の総量を算出、超新星残骸から放射されるガンマ線強度との相関を取ることで、ハドロン起源とレプトン起源のガンマ線成分を分離する。これらの割合が、超新星残骸の進化に対しどのように変化するのかを調べ、衝撃波による高エネルギー粒子加速の時間進化の描像をえる。

  3. 電波観測で探る金属量が星間物質の進化に及ぼす影響

    Grant number:21H00040  2021.4 - 2023.3

    日本学術振興会  科学研究費助成事業  新学術領域研究(研究領域提案型)

    福井康雄, 立原研悟

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    Authorship:Coinvestigator(s)  Grant type:Competitive

    Grant amount:\10400000 ( Direct Cost: \8000000 、 Indirect Cost:\2400000 )

  4. Molecular cloud formation studied by atomic carbon survey

    Grant number:20H01945  2020.4 - 2025.3

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

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    Authorship:Principal investigator  Grant type:Competitive

    Grant amount:\18200000 ( Direct Cost: \14000000 、 Indirect Cost:\4200000 )

  5. Molecular cloud formation studied by atomic carbon survey

    Grant number:23K20238  2020.4 - 2025.3

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

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    Authorship:Principal investigator 

    Grant amount:\18200000 ( Direct Cost: \14000000 、 Indirect Cost:\4200000 )

  6. Observational Studies on the Formation of Star Clusters in Giant Molecular Clouds

    Grant number:18H05440  2018.6 - 2023.3

    Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)

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    Authorship:Coinvestigator(s)  Grant type:Competitive

    Grant amount:\6000000 ( Direct Cost: \6000000 )

  7. Innovation of the “Interstellar medium” by accurate measurements of the interstellar hydrogen

    Grant number:15H05694  2015 - 2019

    Grants-in-Aid for Scientific Research  Grant-in-Aid for Specially Promoted Research

    FUKUI Yasuo, TACHIHARA kengo, YAMAMOTO hiroaki, SANO hidetoshi, OGAWA hideo, TORII kazufumi, HAYAKAWA takahiro, MIZUNO tsunefumi, TAKEUCHI tsutomu, TANIGUCHI yoshiaki, WATANABE naoki, INOUE tsuyoshi

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    Authorship:Coinvestigator(s)  Grant type:Competitive

    In order to better understand a role of the interstellar hydrogen and its phase transition, we carried out a comprehensive study of the interstellar hydrogen based on observations and theoretical studies. The observational data were taken with NANTEN2, ALMA, ASKAP, Planck, Fermi, etc. by covering a wide range of wavelength, and the theoretical studies were based on the magneto hydrodynamical simulations of the interstellar hydrogen. Major results of the research are as follows. We revealed that the HI distribution is highly clumpy with dense HI clumps and that the H_2 formation takes place in the clumps at sub-pc scales simultaneously with the CO formation. The CO/H_2 clouds under formation have been identified in Pegasus etc. over a large scale and also with ALMA at very high resolution. In nearby galaxies, we discovered that HI colliding flows trigger the formation of young massive stellar clusters in R136 etc. and opened a new window toward understanding the formation of the ancient globular clusters. We also established the cosmic ray acceleration in the Galactic SNR RXJ1713.7-3946 through a comparison of the new HESS gamma ray data with the hydrogen distribution.

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Teaching Experience (On-campus) 10

  1. First Year Seminar A

    2020

  2. Introduction to Information Science II

    2020

  3. Astrophysics II

    2020

  4. 宇宙科学

    2020

  5. 物理学概論

    2020

  6. 卒業研究

    2020

  7. 講究

    2020

  8. 情報科学概論I

    2016

  9. Physics tutorial A2

    2016

  10. 物理学演習

    2015

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Teaching Experience (Off-campus) 1

  1. 観測天文学特講

    2015.8 Ibaraki University)

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    Level:Undergraduate (specialized) 

 

Social Contribution 3

  1. 野辺山観測所特別公開招待講演

    Role(s):Lecturer

    国立天文台野辺山観測所  2022.8

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    Audience: Schoolchildren, Junior students, High school students, College students, Graduate students, Teachers, Guardians, General

    Type:Lecture

  2. 市民講座

    Role(s):Lecturer

    NHK文化センター  2022.6

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    Audience: Schoolchildren, Junior students, High school students, College students, Graduate students, Guardians, General

    Type:Lecture

  3. 一般向け講演

    Role(s):Lecturer

    NHK文化センター  2020.7

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    Audience: General

    Type:Lecture

Media Coverage 2

  1. 記者発表「星は一人では生まれない? ガス雲衝突から始まる星団誕生の理解が進む」 Internet

    2021.3

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    Author:Myself 

  2. 記者発表「星の卵の国勢調査 アルマ望遠鏡が追う星のヒナ誕生までの10万年」 Newspaper, magazine

    2020年8月8日 中日新聞 朝刊, 2020年8月8日 河北新報社 朝刊, 2020年8月11日 日本経済新聞 夕刊  2020.8

Academic Activities 2

  1. ALMA Science Advisory Committee International contribution

    Role(s):Review, evaluation

    Joint ALMA Observatory  2020.1

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    Type:Scientific advice/Review 

  2. Japanese Science Advisory Committee International contribution

    Role(s):Review, evaluation

    2014.6

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    Type:Scientific advice/Review