Faculty Profiles - KOBAYASHI Hiroshi

Papers - KOBAYASHI Hiroshi

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Rapid Formation of Gas-giant Planets via Collisional Coagulation from Dust Grains to Planetary Cores Reviewed

Kobayashi, Hiroshi; Tanaka, Hidekazu

ASTROPHYSICAL JOURNAL Vol. 922 page： id. 16 2021.11

Formation of planetary atmospheres. Analytical estimation of vapor production via planetary impacts Reviewed

Miyayama, Ryushi; Kobayashi, Hiroshi

Astronomy & Astrophysics Vol. 688 page： A103 2024.8

Frequencies of Warm Debris Disks Based on Point Source Catalogs of Spitzer, WISE, and Gaia Reviewed

Mizuki, Toshiyuki; Momose, Munetake; Aizawa, Masataka; Kobayashi, Hiroshi

The Astronomical Journal Vol. 167 ( 6 ) page： 275 2024.6

Sticking of Fine Particles in High-velocity Impact: Application to Size Distribution of Dust Grains in a Debris Disk Reviewed

Kadono, T; Kobayashi, H; Yokoyama, M

ASTROPHYSICAL JOURNAL Vol. 960 ( 1 ) 2024.1

A Primordial Origin for the Gas-rich Debris Disks around Intermediate-mass Stars Reviewed International coauthorship

Nakatani, R; Turner, NJ; Hasegawa, Y; Cataldi, G; Aikawa, Y; Marino, S; Kobayashi, H

Vol. 959 ( 2 ) 2023.12

Rapid Formation of Gas-giant Planets via Collisional Coagulation from Dust Grains to Planetary Cores. II. Dependence on Pebble Bulk Density and Disk Temperature

Hiroshi Kobayashi, Hidekazu Tanaka

ASTROPHYSICAL JOURNAL Vol. 954 ( 2 ) 2023.9

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

Thanks to "dust-to-planet" simulations (DTPSs), which treat the collisional evolution directly from dust to giant-planet cores in a protoplanetary disk, we showed that giant-planet cores are formed in & LSIM;10 au in several 105 yr, because porous pebbles grow into planetesimals via collisions prior to drift in 10 au. However, such porous pebbles are unlikely to reproduce the polarized millimeter wavelength light observed from protoplanetary disks. We thus investigate gas-giant core formation with nonporous pebbles via DTPSs. Even nonporous bodies can grow into planetesimals and massive cores that are possible to be gas giants are also formed in several 105 yr. The rapid core formation is mainly via the accretion of planetesimals produced by collisional coagulation of pebbles drifting from the outer disk. The formation mechanism is similar to the case with porous pebbles, while core formation occurs in a wider region (5-10 au) than that with porous pebbles. Although pebble growth and core formation depend on the disk temperature, core formation is likely to occur with disk temperatures in typical optical thick disks around protostars.

DOI： 10.3847/1538-4357/ace96b

Web of Science

Dust Enrichment and Grain Growth in a Smooth Disk around the DG Tau Protostar Revealed by ALMA Triple Bands Frequency Observations Reviewed International coauthorship

Ohashi, S., Momose, M., Kataoka, A., Higuchi, A.E., Tsukagoshi, T., Ueda, T., Codella, C., Podio, L., Hanawa, T., Sakai, N., Kobayashi, H., Okuzumi, S., and Tanaka, H.

The Astrophysical Journal Vol. 954 ( 2 ) page： 110 2023.9

A Constraint on the Amount of Hydrogen from the CO Chemistry in Debris Disks Reviewed

Iwasaki, K; Kobayashi, H; Higuchi, AE; Aikawa, Y

ASTROPHYSICAL JOURNAL Vol. 950 ( 1 ) 2023.6

Heavy-element accretion by proto-Jupiter in a massive planetesimal disc, revisited Reviewed International coauthorship

Shibata, S.; Helled, R.; Kobayashi, H.

Monthly Notices of the Royal Astronomical Society Vol. 519 ( 2 ) page： 1713 - 1731 2023.2

Collisional Growth and Fragmentation of Dust Aggregates. II. Mass Distribution of Icy Fragments Reviewed

Hasegawa, Yukihiko; Suzuki, Takeru K.; Tanaka, Hidekazu; Kobayashi, Hiroshi; Wada, Koji

The Astrophysical Journal Vol. 944 ( 1 ) page： id.38 2023.2

Spitzer/IRS Full Spectral Modeling to Characterize Mineralogical Properties of Silicate Dust in Heavily Obscured AGNs Reviewed

Tsuchikawa, T.; Kaneda, H.; Oyabu, S.; Kokusho, T.; Kobayashi, H.; Toba, Y.

The Astrophysical Journal Vol. 941 ( 1 ) page： id.50 2022.12

Nonlinear Outcome of Coagulation Instability in Protoplanetary Disks. II. Dust-ring Formation Mediated by Backreaction and Fragmentation Reviewed

Tominaga, Ryosuke T.; Tanaka, Hidekazu; Kobayashi, Hiroshi; Inutsuka, Shu-ichiro

The Astrophysical Journal Vol. 940 ( 2 ) page： id.152 2022.12

Nonlinear Outcome of Coagulation Instability in Protoplanetary Disks. I. First Numerical Study of Accelerated Dust Growth and Dust Concentration at Outer Radii Reviewed

Tominaga, Ryosuke T.; Kobayashi, Hiroshi; Inutsuka, Shu-ichiro

The Astrophysical Journal Vol. 937 ( 1 ) page： id.21 2022.9

Formation of Dust Clumps with Sub-Jupiter Mass and Cold Shadowed Region in Gravitationally Unstable Disk around Class 0/I Protostar in L1527 IRS Reviewed International coauthorship

Ohashi, Satoshi; Nakatani, Riouhei; Liu, Hauyu Baobab; Kobayashi, Hiroshi; Zhang, Yichen; Hanawa, Tomoyuki; Sakai, Nami

The Astrophysical Journal Vol. 934 ( 2 ) page： id.163 2022.8

No Evidence of the Significant Grain Growth but Tentative Discovery of Disk Substructure in a Disk around the Class I Protostar L1489 IRS

Ohashi Satoshi, Kobayashi Hiroshi, Sai Jinshi, Sakai Nami

ASTROPHYSICAL JOURNAL Vol. 933 ( 1 ) 2022.7

Coagulation Instability in Protoplanetary Disks: A Novel Mechanism Connecting Collisional Growth and Hydrodynamical Clumping of Dust Particles Reviewed

Tominaga, Ryosuke, T.; Inutsuka, Shu-ichiro, Kobayashi, Hiroshi

ASTROPHYSICAL JOURNAL Vol. 923 page： id.34 2021.12

Effect of Dust Size on the Near-infrared Spectra (1.0-5.0 μm) of Brown Dwarf Atmospheres Reviewed

Sorahana, Satoko; Kobayashi, Hiroshi ; Tanaka, Kyoko K.

ASTROPHYSICAL JOURNAL Vol. 919 page： id. 117 2021.10

SPH simulations for shape deformation of rubble-pile asteroids through spinup: The challenge for making top-shaped asteroids Ryugu and Bennu Reviewed

Sugiura, Keisuke; Kobayashi, Hiroshi ; Watanabe, Sei-ichiro search by orcid ; Genda, Hidenori search by orcid ; Hyodo, Ryuki ; Inutsuka, Shu-ichiro

Icarus 2021.9

The Growth of Protoplanets via the Accretion of Small Bodies in Disks Perturbed by the Planetary Gravity Reviewed

Okamura, Tatsuya; Kobayashi, Hiroshi

ASTROPHYSICAL JOURNAL Vol. 916 page： id. 109 2021.8

A systematic study of silicate absorption features in heavily obscured AGNs observed by Spitzer/IRS Reviewed

Tsuchikawa, T. ; Kaneda, H. ; Oyabu, S. ; Kokusho, T. ; Kobayashi, H. ; Yamagishi, M. ; Toba, Y.

ASTRONOMY & ASTROPHYSICS Vol. 651 page： A117 2021.7

Photoevaporation of Grain-depleted Protoplanetary Disks around Intermediate-mass Stars: Investigating the Possibility of Gas-rich Debris Disks as Protoplanetary Remnants Reviewed International coauthorship

Nakatani, Riouhei; Kobayashi, Hiroshi; Kuiper, Rolf; Nomura, Hideko; Aikawa, Yuri

ASTROPHYSICAL JOURNAL Vol. 915 page： id. 90 2021.7

Collisional Growth and Fragmentation of Dust Aggregates with Low Mass Ratios. I. Critical Collision Velocity for Water Ice Reviewed

Hasegawa, Yukihiko; Suzuki, Takeru K.; Tanaka, Hidekazu; Kobayashi, Hiroshi; Wada, Koji

ASTROPHYSICAL JOURNAL Vol. 915 page： id.22 2021.7

New Growth Mechanism of Dust Grains in Protoplanetary Disks with Magnetically Driven Disk Winds Reviewed

Taki Tetsuo, Kuwabara Koh, Kobayashi Hiroshi, Suzuki Takeru K.

ASTROPHYSICAL JOURNAL Vol. 909 ( 1 ) 2021.3

Ring Formation by Coagulation of Dust Aggregates in the Early Phase of Disk Evolution around a Protostar Reviewed International coauthorship

Ohashi Satoshi, Kobayashi Hiroshi, Nakatani Riouhei, Okuzumi Satoshi, Tanaka Hidekazu, Murakawa Koji, Zhang Yichen, Liu Hauyu Baobab, Sakai Nami

ASTROPHYSICAL JOURNAL Vol. 907 ( 2 ) 2021.2

Is water ice an efficient facilitator for dust coagulation? Reviewed

Kimura Hiroshi, Wada Koji, Kobayashi Hiroshi, Senshu Hiroki, Hirai Takayuki, Yoshida Fumi, Kobayashi Masanori, Hong Peng K., Arai Tomoko, Ishibashi Ko, Yamada Manabu

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY Vol. 498 ( 2 ) page： 1801 - 1813 2020.10

Sample collection from asteroid (162173) Ryugu by Hayabusa2: Implications for surface evolution Reviewed

Morota T., Sugita S., Cho Y., Kanamaru M., Tatsumi E., Sakatanit N., Honda R., Hirata N., Kikuchi H., Yamada M., Yokota Y., Kamedal S., Matsuoka M., Sawada H., Honda C., Kouyama T., Ogawa K., Suzuki H., Yoshioka K., Hayakawa M., Hirata N., Hirabayashi M., Miyamoto H., Michikami T., Hiroi T., Hemmi R., Barnouin O. S., Ernst C. M., Kitazatou K., Nakamura T., Riu L., Senshu H., Kobayashi H., Sasaki S., Komatsu G., Tanabe N., Fujii Y., Irie T., Suemitsu M., Takaki N., Sugimoto C., Yumoto K., Ishida M., Kato H., Moroi K., Domingue D., Michel P., Pilorget C., Iwata T., Abe M., Ohtake M., Nakauchi Y., Tsumura K., Yabuta H., Ishihara Y., Noguchi R., Matsumoto K., Miura A., Namiki N., Tachibana S., Arakawa M., Ikeda H., Wada K., Mizuno T., Hirose C., Hosoda S., Mori O., Shimada T., Soldini S., Tsukizaki R., Yano H., Ozaki M., Takeuchi H., Yamamoto Y., Okada T., Shimaki Y., Shirai K., Iijima Y., Noda H., Kikuchi S., Yamaguchi T., Ogawa N., Ono G., Mimasu Y., Yoshikawa K., Takahashi T., Takei Y., Fujii A., Nakazawa S., Terui F., Tanaka S., Yoshikawa M., Saiki T., Watanabe S., Tsuda Y.

SCIENCE Vol. 368 ( 6491 ) page： 654 - + 2020.5

High-resolution simulations of catastrophic disruptions: Resultant shape distributions

Sugiura Keisuke, Kobayashi Hiroshi, Inutsuka Shu-ichiro

PLANETARY AND SPACE SCIENCE Vol. 181 2020.2

Importance of Giant Impact Ejecta for Orbits of Planets Formed during the Giant Impact Era

Kobayashi Hiroshi, Isoya Kazuhide, Sato Yutaro

ASTROPHYSICAL JOURNAL Vol. 887 ( 2 ) 2019.12

First Subarcsecond Submillimeter-wave [CI] Image of 49 Ceti with ALMA

Higuchi Aya E, Saigo Kazuya, Kobayashi Hiroshi, Iwasaki Kazunari, Momose Munetake, Soon Kang Lou, Sakai Nami, Kunitomo Masanobu, Ishihara Daisuke, Yamamoto Satoshi

ASTROPHYSICAL JOURNAL Vol. 883 ( 2 ) 2019.10

Collisional elongation: Possible origin of extremely elongated shape of 1I/'Oumuamua

Sugiura Keisuke, Kobayashi Hiroshi, Inutsuka Shu-ichiro

ICARUS Vol. 328 page： 14 - 22 2019.8

Near- to mid-infrared spectroscopy of the heavily obscured AGN LEDA 1712304 with AKARI/IRC

Tsuchikawa T., Kaneda H., Oyabu S., Kokusho T., Morihana K., Kobayashi H., Yamagishi M., Toba Y.

ASTRONOMY & ASTROPHYSICS Vol. 626 2019.6

Toward understanding the origin of asteroid geometries Variety in shapes produced by equal-mass impacts

Sugiura K, Kobayashi H, Inutsuka S

ASTRONOMY & ASTROPHYSICS Vol. 620 2018.12

Collisional Disruption of Planetesimals in the Gravity Regime with iSALE Code: Comparison with SPH code for Purely Hydrodynamic Bodies Reviewed

Ryo Suetsugu, Hidekazu Tanaka, Hiroshi Kobayashi, Hidenori Genda

Icarus Vol. 314 page： 121-132 2018.11

From Planetesimal to Planet in Turbulent Disks. II. Formation of Gas Giant Planets

Kobayashi Hiroshi, Tanaka Hidekazu

ASTROPHYSICAL JOURNAL Vol. 862 ( 2 ) 2018.8

Star formation induced by cloud-cloud collisions and galactic giant molecular cloud evolution Reviewed

Kobayashi Masato I. N., Kobayashi Hiroshi, Inutsuka Shu-ichiro, Fukui Yasuo

PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN Vol. 70 2018.5

Impact erosion model for gravity-dominated planetesimals Reviewed

H. Genda, T. Fujita, H. Kobayashi, H. Tanaka, R. Suetsugu, Y. Abe

Icarus Vol. 294 page： 234-246 2017.9

Impact erosion model for gravity-dominated planetesimals

Genda Hidenori, Fujita Tomoaki, Kobayashi Hiroshi, Tanaka Hidekazu, Suetsugu Ryo, Abe Yutaka

ICARUS Vol. 294 page： 234-246 2017.9

A likely detection of a local interplanetary dust cloud passing near the Earth in the AKARI mid-infrared all-sky map

D. Ishihara, T. Kondo, H. Kaneda, T. Suzuki, K. Nakamichi, S. Takaba, H. Kobayashi, S. Masuda, T. Ootsubo, J. Pyo, T. Onaka

ASTRONOMY & ASTROPHYSICS Vol. 603 2017.7

Language：English Publishing type：Research paper (scientific journal) Publisher：EDP SCIENCES S A

Context. We are creating the AKARI mid-infrared all-sky diffuse maps. Through a foreground removal of the zodiacal emission, we serendipitously detected a bright residual component whose angular size is about 50 degrees x 20 degrees at a wavelength of 9 mu m.
Aims. We investigate the origin and the physical properties of the residual component.
Methods. We measured the surface brightness of the residual component in the AKARI mid-infrared all-sky maps.
Results. The residual component was significantly detected only in 2007 January, even though the same region was observed in 2006 July and 2007 July, which shows that it is not due to the Galactic emission. We suggest that this may be a small cloud passing near the Earth. By comparing the observed intensity ratio of I-9 mu m/I-18 mu m with the expected intensity ratio assuming thermal equilibrium of dust grains at 1 AU for various dust compositions and sizes, we find that dust grains in the moving cloud are likely to be much smaller than typical grains that produce the bulk of the zodiacal light.
Conclusions. Considering the observed date and position, it is likely that it originates in the solar coronal mass ejection ( CME) which took place on 2007 January 25.

DOI： 10.1051/0004-6361/201628954

Web of Science

Size dependence of dust distribution around the earth orbit Reviewed

T. Ueda, H. Kobayashi, T. Takeuchi, D. Ishihara, T. Kondo, H. Kaneda

Astrophysical Journal Vol. 153 ( 5 ) page： 232 2017.5

Faint warm debris disks around nearby bright stars explored by AKARI and IRSF Reviewed

Daisuke Ishihara, Nami Takeuchi, Hiroshi Kobayashi, Takahiro Nagayama, Hidehiro Kaneda, Shu-ichiro Inutsuka, Hideaki Fujiwara, Takashi Onaka

Astronomy & Astrophysics Vol. 601 page： A72 2017.5

Faint warm debris disks around nearby bright stars explored by AKARI and IRSF

Daisuke Ishihara, Nami Takeuchi, Hiroshi Kobayashi, Takahiro Nagayama, Hidehiro Kaneda, Shu-ichiro Inutsuka, Hideaki Fujiwara, Takashi Onaka

ASTRONOMY & ASTROPHYSICS Vol. 601 page： A72 2017.5

Language：English Publishing type：Research paper (scientific journal) Publisher：EDP SCIENCES S A

Context. Debris disks are important observational clues for understanding planetary-system formation process. In particular, faint warm debris disks may be related to late planet formation near 1 au. A systematic search of faint warm debris disks is necessary to reveal terrestrial planet formation.
Aims. Faint warm debris disks show excess emission that peaks at mid-IR wavelengths. Thus we explore debris disks using the AKARI mid-IR all-sky point source catalog (PSC), a product of the second generation unbiased IR all-sky survey.
Methods. We investigate IR excess emission for 678 isolated main-sequence stars for which there are 18 mu m detections in the AKARI mid-IR all-sky catalog by comparing their fluxes with the predicted fluxes of the photospheres based on optical to near-IR fluxes and model spectra. The near-IR fluxes are first taken from the 2MASS PSC. However, 286 stars with Ks < 4.5 in our sample have large flux errors in the 2MASS photometry due to saturation. Thus we have measured accurate J, H, and Ks band fluxes, applying neutral density (ND) filters for Simultaneous InfraRed Imager for Unbiased Survey (SIRIUS) on IRSF, the phi 1.4m near-IR telescope in South Africa, and improved the flux accuracy from 14% to 1.8% on average.
Results. We identified 53 debris-disk candidates including eight new detections from our sample of 678 main-sequence stars. The detection rate of debris disks for this work is similar to 8%, which is comparable with those in previous works by Spitzer and Herschel.
Conclusions. The importance of this study is the detection of faint warm debris disks around nearby field stars. At least nine objects have a large amount of dust for their ages, which cannot be explained by the conventional steady-state collisional cascade model.

DOI： 10.1051/0004-6361/201526215

Web of Science

Size Dependence of Dust Distribution around the Earth Orbit

Ueda Takahiro, Kobayashi Hiroshi, Takeuchi Taku, Ishihara Daisuke, Kondo Toru, Kaneda Hidehiro

ASTRONOMICAL JOURNAL Vol. 153 ( 5 ) 2017.5

Detection of Submillimeter-wave [C i] Emission in Gaseous Debris Disks of 49 Ceti and β Pictoris Reviewed

Aya E Higuchi, Aki Sato, Takashi Tsukagoshi, Nami Sakai, Kazunari Iwasaki, Munetake Momose, Hiroshi Kobayashi, Daisuke Ishihara, Sakae Watanabe, Hidehiro Kaneda, Satoshi Yamamoto

Astrophysical Journal Vol. 839 ( 1 ) page： L14 2017.4

Orbital Evolution of Moons in Weakly Accreting Circumplanetary Disks

Yuri I Fujii, Hiroshi Kobayashi, Sanemichi Z Takahashi, Oliver Gressel

Astronomical Journal Vol. 153 ( 4 ) page： 194 2017.4

Detection of Submillimeter-wave [CI] Emission in Gaseous Debris Disks of 49 Ceti and beta Pictoris

Aya E. Higuchi, Aki Sato, Takashi Tsukagoshi, Nami Sakai, Kazunari Iwasaki, Munetake Momose, Hiroshi Kobayashi, Daisuke Ishihara, Sakae Watanabe, Hidehiro Kaneda, Satoshi Yamamoto

ASTROPHYSICAL JOURNAL LETTERS Vol. 839 ( 1 ) page： L14 2017.4

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

We have detected [C I] P-3(1)-P-3(0) emissions in the gaseous debris disks of 49 Ceti and beta Pictoris with the 10 m telescope of the Atacama Submillimeter Telescope Experiment, which is the first detection of such emissions. The line profiles of [C I] are found to resemble those of CO(J = 3-2) observed with the same telescope and the Atacama Large Millimeter/submillimeter Array. This result suggests that atomic carbon (C) coexists with CO in the debris disks. and is likely formed by the photodissociation of CO. Assuming an optically thin [C I] emission with the excitation temperature ranging from 30 to 100. K, the column density of C is evaluated to be (2.2 +/- 0.2). x. 10(17) and (2.5 +/- 0.7). x. 10(16). cm(-2) for 49 Ceti and beta Pictoris, respectively. The C/CO column density ratio is thus derived to be 54 +/- 19 and 69 +/- 42 for 49 Ceti and beta Pictoris, respectively. These ratios are higher than those of molecular clouds and diffuse clouds by an order of magnitude. The unusually high ratios of C to CO are likely attributed to a lack of H-2 molecules needed to reproduce CO molecules efficiently from C. This result implies a small number of H-2 molecules in the gas disk,. i.e., there is an appreciable contribution of secondary gas from dust grains.

DOI： 10.3847/2041-8213/aa67f4

Web of Science

Orbital Evolution of Moons in Weakly Accreting Circumplanetary Disks

Fujii Yuri I., Kobayashi Hiroshi, Takahashi Sanemichi Z., Gressel Oliver

ASTRONOMICAL JOURNAL Vol. 153 ( 4 ) 2017.4

Evolutionary Description of Giant Molecular Cloud Mass Functions on Galactic Disks Reviewed

Masato I.N. Kobayashi, Shu-ichiro Inutsuka, Hiroshi Kobayashi, Kenji Hasegawa

Astrophysical Journal Vol. 836 ( 2 ) page： 175 2017.2

Evolutionary Description of Giant Molecular Cloud Mass Functions on Galactic Disks

Masato I. N. Kobayashi, Shu-ichiro Inutsuka, Hiroshi Kobayashi, Kenji Hasegawa

ASTROPHYSICAL JOURNAL Vol. 836 ( 2 ) 2017.2

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

Recent radio observations show that giant molecular cloud (GMC) mass functions noticeably vary across galactic disks. High-resolution magnetohydrodynamics simulations show that multiple episodes of compression are required for creating a molecular cloud in the magnetized interstellar medium. In this article, we formulate the evolution equation for the GMC mass function to reproduce the observed profiles, for which multiple compressions are driven by a network of expanding shells due to H II regions and supernova remnants. We introduce the cloudcloud collision (CCC) terms in the evolution equation in contrast to previous work (Inutsuka et al.). The computed time evolution suggests that the GMC mass function slope is governed by the ratio of GMC formation timescale to its dispersal timescale, and that the CCC effect is limited only in the massive end of the mass function. In addition, we identify a gas resurrection channel that allows the gas dispersed by massive stars to regenerate GMC populations or to accrete onto pre-existing GMCs. Our results show that almost all of the dispersed gas contributes to the mass growth of pre-existing GMCs in arm regions whereas less than 60% contributes in inter-arm regions. Our results also predict that GMC mass functions have a single power-law exponent in the mass range < 10(5.5) M-circle dot (where M-circle dot represents the solar mass), which is well characterized by GMC self-growth and dispersal timescales. Measurement of the GMC mass function slope provides a powerful method to constrain those GMC timescales and the gas resurrecting factor in various environments across galactic disks.

DOI： 10.3847/1538-4357/836/2/175

Web of Science

Sintering-induced Dust Ring Formation in Protoplanetary Disks: Application to the HL Tau Disk Reviewed

Satoshi Okuzumi, Munetake Momose, Sin-iti Sirono, Hiroshi Kobayashi, Hidekazu Tanaka

Astrophysical Journal Vol. 821 ( 2 ) page： id 82, 24 2016.4

From Planetesimals to Planets in Turbulent Protoplanetary Disks. I. Onset of Runaway Growth Reviewed

Hiroshi Kobayashi, Hidekazu Tanaka, Satoshi Okuzumi

Astrophysical Journal Vol. 817 ( 2 ) page： id. 105, 10 2016.2

Resolution Dependence of Disruptive Collisions between Planetesimals in the Gravity Regime Reviewed

H. Genda, T. Fujita, H. Kobayashi, H. Tanaka, Y. Abe

Icarus Vol. 262 page： 58 2015.12

Comet C/2012 S1 (ISON) coma composition at ~4 au from HST observations Reviewed

E. Zubko, G. Videen, D. C. Hines, Y. Shkuratov, V. Kaydash, K. Muinonen, M. M. Knight, M. L. Sitko, C. M. Lisse, M. Mutchler, D. H. Wooden, J.-Y. Li, H. Kobayashi

Planetary and Space Science Vol. 118 page： 138 2015.12

Warm Debris Disks Produced by Giant Impacts During Terrestrial Planet Formation

H. Genda, H. Kobayashi, E. Kokubo

Astrophysical Journal Vol. 810 page： 136(8p) 2015.11

Significant gas-to-dust ratio asymmetry and variation in the disk of HD 142527 and the indication of gas depletion

Takayuki Muto, Takashi Tsukagoshi, Munetake Momose, Tomoyuki Hanawa, Hideko Nomura, Misato Fukagawa, Kazuya Saigo, Akimasa Kataoka, Yoshimi Kitamura, Sanemichi Z Takahashi, Shu-ichiro Inutsuka, Taku Takeuchi, Hiroshi Kobayashi, Eiji Akiyama, Mitsuhiko Honda, Hideaki Fujiwara, Hiroshi Shibai

Publications of the Astronomical Society of Japan page： psv098 2015.11

Cohesion of Amorphous Silica Spheres: Toward a Better Understanding of The Coagulation Growth of Silicate Dust Aggregates Reviewed

Hiroshi Kimura, Koji Wada, Hiroki Senshu, Hiroshi Kobayashi

Astrophysical Journal Vol. 812 page： 1 2015.10

Planetary and meteoritic Mg/Si and δ30Si variations inherited from solar nebula chemistry Reviewed

N. Dauphas, F. Poitrasson, C. Burkhardt, H. Kobayashi, K. Kurosawa

Earth and Planetary Science Letter Vol. 427 page： 236 2015.10

Formation of terrestrial planets in disks evolving via disk winds and implications for the origin of the solar system's terrestrial planets

M. Ogihara, H. Kobayashi, S. Inutsuka, T. Suzuki

Astronomy & Astrophysics Vol. 579 page： A65 2015.6

Orbital Evolution of Planetesimals in Gaseous Disks

Hiroshi Kobayashi

Earth, Planets and Space Vol. 67 page： 60 2015.4

Debris disc formation induced by planetary growth Reviewed

Hiroshi Kobayashi, Torsten Loehne

Monthly Notices of the Royal Astronomical Society Vol. 442 ( 4 ) page： 464-8602 2014.8

N-body Simulations of Terrestrial Planet Formation under the Influence of a Hot Jupiter Reviewed

Ogihara, Masahiro; Kobayashi, Hiroshi; Inutsuka, Shu-ichiro

The Astrophysical Journal Vol. 787 ( 2 ) page： id 172(16p) 2014.6

Local Enhancement of the Surface Density in the Protoplanetary Ring Surrounding HD 142527 Reviewed

Fukagawa, Misato; Tsukagoshi, Takashi; Momose, Munetake; Saigo, Kazuya; Ohashi, Nagayoshi; Kitamura, Yoshimi; Inutsuka, Shu-ichiro; Muto, Takayuki; Nomura, Hideko; Takeuchi, Taku; Kobayashi, Hiroshi; Hanawa, Tomoyuki; Akiyama, Eiji; Honda, Mitsuhiko; Fujiwara, Hideaki; Kataoka, Akimasa; Takahashi, Sanemichi Z.; Shibai, Hiroshi

Publications of the Astronomical Society of Japan Vol. 65 ( 6 ) page： L14 (5p) 2013.12

Crowding-out of Giants by Dwarfs: An Origin for the Lack of Companion Planets in Hot Jupiter Systems Reviewed

Ogihara, Masahiro; Inutsuka, Shu-ichiro; Kobayashi, Hiroshi

The Astrophysical Journal Letters Vol. 778 ( 1 ) page： id L9 (5p) 2013.11

Growth efficiency of dust aggregates through collisions with high mass ratios Reviewed

Wada, Koji; Tanaka, Hidekazu; Okuzumi, Satoshi; Kobayashi, Hiroshi; Suyama, Toru; Kimura, Hiroshi; Yamamoto, Tetsuo

Astronomy & Astrophysics Vol. 559 page： id A62 (8p) 2013.11

Evolution of dust grain size distribution by shattering in the interstellar medium: Robustness and uncertainty Reviewed

Hirashita, H.; Kobayashi, H.

Earth, Planets and Space Vol. 65 ( 10 ) page： 1083-1094 2013.10

Condition for Capture into First-order Mean Motion Resonances and Application to Constraints on the Origin of Resonant Systems Reviewed

Ogihara, Masahiro; Kobayashi, Hiroshi

The Astrophysical Journal Vol. 775 ( 1 ) page： id 34 (12p) 2013.9

Small planetesimals in a massive disk formed Mars Reviewed

Kobayashi, Hiroshi; Dauphas, Nicolas

Icarus Vol. 225 ( 1 ) page： 122-130 2013.7

Dust mantle of comet 9P/Tempel 1: dynamical constraints on physical properties Reviewed

Kobayashi, H.; Kimura, H.; Yamamoto, S.

Astronomy & Astrophysics Vol. 550 page： id A72 (4p) 2013.2

Rapid Formation of Saturn after Jupiter Completion Reviewed

Kobayashi, Hiroshi; Ormel, Chris W.; Ida, Shigeru

The Astrophysical Journal Vol. 756 ( 1 ) page： id 70 (7p) 2012.9

Rapid Coagulation of Porous Dust Aggregates outside the Snow Line: A Pathway to Successful Icy Planetesimal Formation Reviewed

Okuzumi, Satoshi; Tanaka, Hidekazu; Kobayashi, Hiroshi; Wada, Koji

The Astrophysical Journal Vol. 752 ( 2 ) page： id 106 (18p) 2012.6

An improved model of the Edgeworth-Kuiper debris disk Reviewed

Vitense, Ch.; Krivov, A. V.; Kobayashi, H.; Löhne, T.

Astronomy & Astrophysics Vol. 540 page： id A30 (10p) 2012.4

Understanding How Planets Become Massive. I. Description and Validation of a New Toy Model Reviewed

Ormel, C. W.; Kobayashi, H.

The Astrophysical Journal Vol. 747 ( 2 ) page： id 115 (21p) 2012.3

破壊が決める原始惑星の最終質量 Invited Reviewed

小林浩

日本惑星科学会誌「遊星人」 Vol. 20 ( 4 ) page： 317 2011.12

Sublimation temperature of circumstellar dust particles and its importance for dust ring formation Reviewed

Kobayashi, H.; Kimura, H.; Watanabe, S.-i.; Yamamoto, T.; Müller, S.

Earth, Planets and Space Vol. 63 ( 10 ) page： 1067-1075 2011.10

Planetary Core Formation with Collisional Fragmentation and Atmosphere to Form Gas Giant Planets Reviewed

Kobayashi, Hiroshi; Tanaka, Hidekazu; Krivov, Alexander V.

The Astrophysical Journal Vol. 738 ( 1 ) page： id 35 (11p) 2011.9

Planetary growth with collisional fragmentation and gas drag Reviewed

Kobayashi, Hiroshi; Tanaka, Hidekazu; Krivov, Alexander V.; Inaba, Satoshi

Icarus Vol. 209 ( 2 ) page： 836-847 2010.10

Fragmentation model dependence of collision cascades Reviewed

Kobayashi, Hiroshi; Tanaka, Hidekazu

Icarus Vol. 206 ( 2 ) page： 735-746 2010.4

Planets in orbit around β Pictoris formed the orbital architecture of planetesimal belts? Reviewed

Kimura, H.; Fukagawa, M.; Tamura, M.; Kobayashi, H.; Yamamoto, T.; Ishii, M.; Suto, H.

Earth, Planets and Space Vol. 62 ( 1 ) page： 111-116 2010.1

Collisional process on Comet 9/P Tempel 1: mass loss of its dust and ice by impacts of asteroidal objects and its collisional history Reviewed

Yamamoto, S.; Wada, K.; Kobayashi, H.; Kimura, H.; Ishiguro, M.; Matsui, T.

Earth, Planets and Space Vol. 62 ( 1 ) page： 5-11 2010.1

Ice sublimation of dust particles and their detection in the outer solar system Reviewed

Kobayashi, H.; Kimura, H.; Yamamoto, S.; Watanabe, S.-I.; Yamamoto, T.

Earth, Planets and Space Vol. 62 ( 1 ) page： 57-61 2010.1

Dust ring formation due to sublimation of dust grains drifting radially inward by the Poynting-Robertson drag: An analytical model Reviewed

Kobayashi, Hiroshi; Watanabe, Sei-ichiro; Kimura, Hiroshi; Yamamoto, Tetsuo

Icarus Vol. 201 ( 1 ) page： 395-405 2009.5

Dust ring formation due to ice sublimation of radially drifting dust particles under the Poynting Robertson effect in debris disks Reviewed

Kobayashi, Hiroshi; Watanabe, Sei-ichiro; Kimura, Hiroshi; Yamamoto, Tetsuo

Icarus Vol. 195 ( 2 ) page： 871-881 2008.6

太陽系外縁天体の起源と進化 Invited Reviewed

小林浩

日本惑星科学会誌「遊星人」 Vol. 17 ( 1 ) page： 22 2008.3

Comet 9P/Tempel 1: Interpretation with the Deep Impact Results Reviewed

Yamamoto, Satoru; Kimura, Hiroshi; Zubko, Evgenij; Kobayashi, Hiroshi; Wada, Koji; Ishiguro, Masateru; Matsui, Takafumi

The Astrophysical Journal Vol. 673 ( 2 ) page： L199-L202 2008.2

The evidence of an early stellar encounter in Edgeworth Kuiper belt Reviewed

Kobayashi, Hiroshi; Ida, Shigeru; Tanaka, Hidekazu

Icarus Vol. 177 ( 1 ) page： 246-255 2005.9

Percolation-fission model study of the 1 GeV proton-induced reaction on Pb 208 targets Reviewed

M Katsuma, H Kobayashi, T Sasa, T Sawada

Physical Review C Vol. 71 ( 4 ) page： 044605 2005.4

なぜ海王星以遠では惑星がないのか? Reviewed

小林浩，井田茂

日本惑星科学会誌「遊星人」 Vol. 10 ( 4 ) page： 208 2001.12

The Effects of a Stellar Encounter on a Planetesimal Disk Reviewed

Kobayashi, Hiroshi; Ida, Shigeru

Icarus Vol. 153 ( 2 ) page： 416-429 2001.10

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