Faculty Profiles - KOBAYASHI Hiroshi

Papers - KOBAYASHI Hiroshi

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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

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Papers - KOBAYASHI Hiroshi