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School of Science Professor
Title
Professor
Homepage
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OKUZUMI SATOSHI
News & Topics
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Astronomers Discover First Step Toward Planet Formation
2023/10/06
Languages： English
An international research team led by Project Assistant Professor Satoshi Ohashi of the National Astronomical Observatory of Japan (NAOJ) has conducted high-resolution and multi-wavelength observ
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2023/10/06
Languages： Japanese
概要東京工業大学理学院地球惑星科学系の奥住聡准教授を含む国立天文台の大橋聡史特任助教らの国際研究チームは、比較的若い原始星、おうし座DG星まわりの原始惑星系円盤に対し、アルマ望遠鏡※による高解像度観測や多波長観測を行い、円盤の構造や惑星の材料となる塵の大きさ、量について詳細に調べま
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宇宙の塵の塊の「跳ね返り」が衝突合体による微惑星形成を阻害する 大きくなるとくっつきにくくなる粉状体の衝突挙動を発見
2023/07/11
Languages： Japanese
要点-2つの固体微粒子の塊が衝突する数値シミュレーションを行い、構成粒子数が約1万粒子から14万粒子までの様々な大きさの塊について、衝突後に2つの塊がくっついて大きな塊となる（以下、「衝突合体」）確率を調査した。-衝突させる微粒子の塊の半径が大きくなるほど衝突
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隕石中に閉じ込められたCO2に富む液体の水を世界で初めて発見 太陽系形成時に誕生した小天体がその後の木星の軌道変化に伴なって移動した証拠
2021/05/11
Languages： Japanese
立命館大学総合科学技術研究機構の𡈽山明教授、東京工業大学理学院地球惑星科学系の奥住聡准教授らの研究グループは、炭素質コンドライトと呼ばれる隕石（サッターズミル隕石：Sutter'sMill）の鉱物の中に、X線ナノCTおよび低温下での透過型電子顕微鏡を用いた分析により、鉱物中に閉じ込められた二酸化炭素
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太陽系外惑星の材料を特定する新しい観測手法の提案 壊れゆく惑星から流れ出る塵の色を宇宙望遠鏡の組み合わせで観る
2020/10/07
Languages： Japanese
要点-太陽系外の惑星を構成する固体物質はこれまでのところ不明-高温のため蒸発しつつある太陽系外惑星のもつ「塵の尾」に着目-複数の宇宙望遠鏡を用いて塵の尾の「色」を観測することにより、惑星の組成が推定できることを立証概要東京工業大学理学院地球惑星科学系の奥谷彩香大学院生（博士後期課程2年）、奥住聡准教
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巨大氷惑星の形成現場を捉えた―アルマ望遠鏡で見つけた海王星サイズの惑星形成の証拠―
2016/09/21
Languages： Japanese
概要 近年、太陽以外の星のまわりにも、多様性に富む数多くの惑星が発見されてきました。しかし、それらの形成過程は謎のままであり、天王星・海王星のような巨大氷惑星の形成過程も、いまだによく分かっていません。うみへび座TW星は、年齢が約1,000万歳と若く、星のまわりには塵とガスの円盤があると知られています。研究チームは今回、円盤内の塵が放つ電波をアルマ望遠鏡[用語1]で捉え、円盤のようすを詳しく描き出すことに成功しました。円盤には何本かの暗い隙間が刻まれており、特に半径22天文単位[用語2]の隙間では、周囲に比べて小さな塵が豊富に存在することがわかりました。理論的研究から、円盤内に惑星が存在すると、こうした特徴が現れることが提唱されており、今回の観測成果はこの理論予測と合致します。隙間の特徴を考慮すると、ここには海王星程度の大きさの惑星ができていると考えられます。この発見により、どんな大きさの惑星が、どこでいつごろ作られるかが明らかにできると期待されます。
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ALMA Spots Possible Formation Site of Icy Giant Planet
2016/09/21
Languages： English
Astronomers found signs of a growing planet around TW Hydra, a nearby young star, using the Atacama Large Millimeter/submillimeter Array (ALMA). Based on the distance from the central star and the distribution of tiny dust grains, the baby planet is thought to be an icy giant, similar to Uranus and Neptune in our Solar System. This result is another step towards understanding the origins of various types of planets.
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2015/02/12
Languages： Japanese
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Constraining the strength of magnetic fields in planet-forming environments
2015/02/12
Languages： English
News & Media
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BSプレミアム「コズミックフロント」に奥住聡准教授と玄田英典准教授が出演
2021/10/18
Languages： Japanese
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NHK BSプレミアム「コズミックフロントNEXT」に理学院の奥住聡准教授が出演
2017/01/26 22:00
Languages： Japanese
TV： NHK BSプレミアム 「コズミックフロントNEXT」
Degree
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Ph.D. ( Kyoto University )
Research Interests
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原始惑星系円盤
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惑星科学
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planet formation and evolution
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theoretical astrophysics
Research Areas
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Natural Science / Astronomy
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Natural Science / Theoretical studies related to particle-, nuclear-, cosmic ray and astro-physics
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Natural Science / Space and planetary sciences
Education
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Kyoto University Graduate School of Human and Environmental Studies
2005.4 - 2010.3
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Kyoto University Faculty of Integrated Human Studies
2001.4 - 2005.3
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東京都立国立高等学校
1998.4 - 2001.3
Research History
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Institute of Science Tokyo Department of Earth and Planetary Sciences, School of Science Professor
2024.10
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Tokyo Institute of Technology School of Science Professor
2024.4 - 2024.9
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Tokyo Institute of Technology School of Science Associate Professor
2016.4 - 2024.3
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Tokyo Institute of Technology Graduate School of Science and Engineering, Department of Earth and Planetary Sciences Associate Professor
2015.9 - 2016.3
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Tokyo Institute of Technology Department of Earth and Planetary Sciences Assistant Professor
2013.3 - 2015.8
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Nagoya University Department of Physics JSPS Superlative Research Fellow
2010.4 - 2013.2
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Kyoto University Graduate School of Human and Environmental Studies JSPS Research Fellow (DC2)
2008.4 - 2010.3
Professional Memberships
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THE JAPANESE SOCIETY FOR PLANETARY SCIENCES
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ASTRONOMICAL SOCIETY OF JAPAN
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理論天文学宇宙物理学懇談会
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JAPAN GEOSCIENCE UNION
Committee Memberships
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日本惑星科学会 広報専門委員長
2019.10
Committee type：Academic society
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日本惑星科学会 総務専門委員
2013.3
Committee type：Academic society
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日本惑星科学会 行事部会委員
2013.3
Committee type：Academic society
Papers
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Nitrogen transport in protoplanetary disks by ammonium salts: A possible origin of Jupiter’s nitrogen enrichment
Kanon Nakazawa, Satoshi Okuzumi
Publications of the Astronomical Society of Japan 2025.6
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Thermally driven spontaneous dust accumulation in the inner regions of protoplanetary disks
Ryo Kato, Takahiro Ueda, Satoshi Okuzumi
Publications of the Astronomical Society of Japan 2025.5
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Investigating the Bouncing Barrier with Collision Simulations of Compressed Dust Aggregates
Haruto Oshiro, Misako Tatsuuma, Satoshi Okuzumi, Hidekazu Tanaka
The Astrophysical Journal 2025.4
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Modeling protoplanetary disk heating by planet-induced spiral shocks
Tomohiro Ono, Tatsuki Okamura, Satoshi Okuzumi, Takayuki Muto
Publications of the Astronomical Society of Japan 2025.2
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Surface accretion as a dust retention mechanism in protoplanetary disks. I. Formulation and proof-of-concept simulations
Satoshi Okuzumi
Publications of the Astronomical Society of Japan 2025.2
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Dust ring and gap formation by gas flow induced by low-mass planets embedded in protoplanetary disks
Ayumu Kuwahara, Michiel Lambrechts, Hiroyuki Kurokawa, Satoshi Okuzumi, Takayuki Tanigawa
Astronomy & Astrophysics 2024.12
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Isotopic variation of non-carbonaceous meteorites caused by dust leakage across the Jovian gap in the solar nebula Reviewed
Kazuaki A Homma, Satoshi Okuzumi, Sota Arakawa, Ryota Fukai
Publications of the Astronomical Society of Japan 2024.10
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On the elastoplastic behavior in collisional compression of spherical dust aggregates
Sota Arakawa, Hidekazu Tanaka, Eiichiro Kokubo, Satoshi Okuzumi, Misako Tatsuuma, Daisuke Nishiura, Mikito Furuichi
Granular Matter 26 ( 4 ) 2024.9
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A self-consistent model for dust settling and the vertical shear instability in protoplanetary disks
Yuya Fukuhara, Satoshi Okuzumi
Publications of the Astronomical Society of Japan 2024.8
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Dynamics near the inner dead-zone edges in a proprotoplanetary disk
Kazunari Iwasaki, Kengo Tomida, Shinsuke Takasao, Satoshi Okuzumi, Takeru K Suzuki
Publications of the Astronomical Society of Japan 2024.8
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Support for fragile porous dust in a gravitationally self-regulated disk around IM Lup
Takahiro Ueda, Ryo Tazaki, Satoshi Okuzumi, Mario Flock, Prakruti Sudarshan
Nature Astronomy 2024.7
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Aligned grains and scattered light found in gaps of planet-forming disk
Ian W. Stephens, Zhe-Yu Daniel Lin, Manuel Fernández-López, Zhi-Yun Li, Leslie W. Looney, Haifeng Yang, Rachel Harrison, Akimasa Kataoka, Carlos Carrasco-Gonzalez, Satoshi Okuzumi, Ryo Tazaki
Nature 2023.11
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Satoshi Ohashi, Munetake Momose, Akimasa Kataoka, Aya E Higuchi, Takashi Tsukagoshi, Takahiro Ueda, Claudio Codella, Linda Podio, Tomoyuki Hanawa, Nami Sakai, Hiroshi Kobayashi, Satoshi Okuzumi, Hidekazu Tanaka
The Astrophysical Journal 954 ( 2 ) 110 - 110 2023.8
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Formulating Compressive Strength of Dust Aggregates from Low to High Volume Filling Factors with Numerical Simulations
Misako Tatsuuma, Akimasa Kataoka, Satoshi Okuzumi, Hidekazu Tanaka
ASTROPHYSICAL JOURNAL 953 ( 1 ) 2023.8
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Size Dependence of the Bouncing Barrier in Protoplanetary Dust Growth
Sota Arakawa, Satoshi Okuzumi, Misako Tatsuuma, Hidekazu Tanaka, Eiichiro Kokubo, Daisuke Nishiura, Mikito Furuichi, Taishi Nakamoto
The Astrophysical Journal Letters 951 ( 1 ) L16 - L16 2023.7
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Probing the temperature structure of the inner region of a protoplanetary disk
Takahiro Ueda, Satoshi Okuzumi, Akimasa Kataoka, Mario Flock
Astronomy & Astrophysics 2023.7
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The Roles of Dust Growth in the Temperature Evolution and Snow Line Migration in Magnetically Accreting Protoplanetary Disks
Katsushi Kondo, Satoshi Okuzumi, Shoji Mori
The Astrophysical Journal 2023.6
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The impact of dust evolution on the dead zone outer edge in magnetized protoplanetary disks
Timmy N. Delage, Matías Gárate, Satoshi Okuzumi, Chao-Chin Yang, Paola Pinilla, Mario Flock, Sebastian Markus Stammler, Tilman Birnstiel
Astronomy & Astrophysics 2023.6
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Massive Protostellar Disks as a Hot Laboratory of Silicate Grain Evolution
Ryota Yamamuro, Kei E. I. Tanaka, Satoshi Okuzumi
The Astrophysical Journal 2023.5
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Two saturated states of the vertical shear instability in protoplanetary disks with vertically varying cooling times
Yuya Fukuhara, Satoshi Okuzumi, Tomohiro Ono
Publications of the Astronomical Society of Japan 2023.2
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Modelling the evolution of silicate/volatile accretion discs around white dwarfs
Ayaka Okuya, Shigeru Ida, Ryuki Hyodo, Satoshi Okuzumi
Monthly Notices of the Royal Astronomical Society 2022.12
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Color Dependence of the Transit Detectability of Young Active M Dwarfs
Kohei Miyakawa, Teruyuki Hirano, Bun’ei Sato, Satoshi Okuzumi, Eric Gaidos
The Astronomical Journal 2022.11
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A global two-layer radiative transfer model for axisymmetric, shadowed protoplanetary disks
Satoshi Okuzumi, Takahiro Ueda, Neal J Turner
Publications of the Astronomical Society of Japan 2022.8
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Impact of Dust Size Distribution Including Large Dust Grains on Magnetic Resistivity: An Analytical Approach
Yusuke Tsukamoto, Satoshi Okuzumi
The Astrophysical Journal 2022.7
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ALMA High-resolution Multiband Analysis for the Protoplanetary Disk around TW Hya
Takashi Tsukagoshi, Hideko Nomura, Takayuki Muto, Ryohei Kawabe, Kazuhiro D. Kanagawa, Satoshi Okuzumi, Shigeru Ida, Catherine Walsh, Tom J. Millar, Sanemichi Z. Takahashi, Jun Hashimoto, Taichi Uyama, Motohide Tamura
The Astrophysical Journal 928 ( 1 ) 49 - 49 2022.3
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Steady-state accretion in magnetized protoplanetary disks
Timmy N. Delage, Satoshi Okuzumi, Mario Flock, Paola Pinilla, Natalia Dzyurkevich
Astronomy & Astrophysics 2022.2
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Modeling Early Clustering of Impact-induced Ejecta Particles Based on Laboratory and Numerical Experiments
Kanon Nakazawa, Satoshi Okuzumi, Kosuke Kurosawa, Sunao Hasegawa
The Planetary Science Journal 2021.12
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Early Initiation of Inner Solar System Formation at the Dead-zone Inner Edge
Takahiro Ueda, Masahiro Ogihara, Eiichiro Kokubo, Satoshi Okuzumi
The Astrophysical Journal Letters 921 ( 1 ) L5 - L5 2021.11
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Akira Kouchi, Masashi Tsuge, Tetsuya Hama, Yasuhiro Oba, Satoshi Okuzumi, Sin-iti Sirono, Munetake Momose, Naoki Nakatani, Kenji Furuya, Takashi Shimonishi, Tomoya Yamazaki, Hiroshi Hidaka, Yuki Kimura, Ken-ichiro Murata, Kazuyuki Fujita, Shunichi Nakatsubo, Shogo Tachibana, Naoki Watanabe
The Astrophysical Journal 918 ( 2 ) 45 - 45 2021.9
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Evolution of the Water Snow Line in Magnetically Accreting Protoplanetary Disks
Shoji Mori, Satoshi Okuzumi, Masanobu Kunitomo, Xue-Ning Bai
The Astrophysical Journal 916 ( 2 ) 72 - 72 2021.8
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A Tale of Two Grains: Impact of Grain Size on Ring Formation via Nonideal Magnetohydrodynamic Processes
Xiao 晓 Hu 胡, Lile 力乐 Wang 王, Satoshi 住 聡 Okuzumi 奥, Zhaohuan 照 寰 Zhu 朱
The Astrophysical Journal 913 ( 2 ) 133 - 133 2021.6
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Effects of Dust Evolution on the Vertical Shear Instability in the Outer Regions of Protoplanetary Disks
Yuya Fukuhara, Satoshi Okuzumi, Tomohiro Ono
The Astrophysical Journal 2021.6
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Hideko Nomura, Takashi Tsukagoshi, Ryohei Kawabe, Takayuki Muto, Kazuhiro D. Kanagawa, Yuri Aikawa, Eiji Akiyama, Satoshi Okuzumi, Shigeru Ida, Seokho Lee, Catherine Walsh, T. J. Millar
The Astrophysical Journal 914 ( 2 ) 113 - 113 2021.6
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Haze Formation on Triton
Kazumasa Ohno, Xi Zhang, Ryo Tazaki, Satoshi Okuzumi
The Astrophysical Journal 912 ( 1 ) 37 - 37 2021.5
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Discovery of primitive CO2-bearing fluid in an aqueously altered carbonaceous chondrite
Akira Tsuchiyama, Akira Miyake, Satoshi Okuzumi, Akira Kitayama, Jun Kawano, Kentaro Uesugi, Akihisa Takeuchi, Tsukasa Nakano, Michael Zolensky
Science Advances 7 ( 17 ) 2021.4
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Formation of chiral CO polyhedral crystals on icy interstellar grains
Akira Kouchi, Masashi Tsuge, Tetsuya Hama, Hiromasa Niinomi, Naoki Nakatani, Takashi Shimonishi, Yasuhiro Oba, Yuki Kimura, Sin-iti Sirono, Satoshi Okuzumi, Munetake Momose, Kenji Furuya, Naoki Watanabe
Monthly Notices of the Royal Astronomical Society 505 ( 1 ) 1530 - 1542 2021.4
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Planetesimal formation around the snow line
Ryuki Hyodo, Tristan Guillot, Shigeru Ida, Satoshi Okuzumi, Andrew N. Youdin
Astronomy & Astrophysics 646 2021.2
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Ring Formation by Coagulation of Dust Aggregates in the Early Phase of Disk Evolution around a Protostar
Satoshi Ohashi, Hiroshi Kobayashi, Riouhei Nakatani, Satoshi Okuzumi, Hidekazu Tanaka, Koji Murakawa, Yichen Zhang, Hauyu Baobab Liu, Nami Sakai
The Astrophysical Journal 907 ( 2 ) 2021.2
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Planetesimal formation around the snow line: I. Monte Carlo simulations of silicate dust pile-up in a turbulent disk
Shigeru Ida, Tristan Guillot, Ryuki Hyodo, Satoshi Okuzumi, Andrew N. Youdin
ASTRONOMY & ASTROPHYSICS 646 2021.2
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Constraining the Bulk Composition of Disintegrating Exoplanets Using Combined Transmission Spectra from JWST and SPICA
Ayaka Okuya, Satoshi Okuzumi, Kazumasa Ohno, Teruyuki Hirano
The Astrophysical Journal 2020.10
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Clouds of Fluffy Aggregates: How They Form in Exoplanetary Atmospheres and Influence Transmission Spectra
Kazumasa Ohno, Satoshi Okuzumi, Ryo Tazaki
The Astrophysical Journal 2020.3
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The Galilean Satellites Formed Slowly from Pebbles
Yuhito Shibaike, Chris W. Ormel, Shigeru Ida, Satoshi Okuzumi, Takanori Sasaki
The Astrophysical Journal 2019.11
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Nonideal MHD Simulation of HL Tau Disk: Formation of Rings
Xiao 晓 Hu 胡, Zhaohuan 照寰 Zhu 朱, Satoshi 住聡 Okuzumi 奥, Xue-Ning 雪宁 Bai 白, Lile 力乐 Wang 王, Kengo 田賢吾 Tomida 富, James M. Stone
The Astrophysical Journal 2019.11
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Unveiling Dust Aggregate Structure in Protoplanetary Disks by Millimeter-wave Scattering Polarization
Ryo Tazaki, Hidekazu Tanaka, Akimasa Kataoka, Satoshi Okuzumi, Takayuki Muto
The Astrophysical Journal 885 ( 1 ) 2019.10
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Nonsticky Ice at the Origin of the Uniformly Polarized Submillimeter Emission from the HL Tau Disk
Satoshi Okuzumi, Ryo Tazaki
The Astrophysical Journal 2019.6
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The Generalized Nonlinear Ohm's Law: How a Strong Electric Field Influences Nonideal MHD Effects in Dusty Protoplanetary Disks
Satoshi Okuzumi, Shoji Mori, Shu-ichiro Inutsuka
The Astrophysical Journal 2019.6
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Rocky Planetesimal Formation Aided by Organics
Kazuaki A. Homma, Satoshi Okuzumi, Taishi Nakamoto, Yuta Ueda
The Astrophysical Journal 877 ( 2 ) 2019.6
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Water delivery by pebble accretion to rocky planets in habitable zones in evolving disks
Shigeru Ida, Takeru Yamamura, Satoshi Okuzumi
Astronomy & Astrophysics 624 2019.4
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Millimeter-wave Polarization Due to Grain Alignment by the Gas Flow in Protoplanetary Disks Reviewed
Akimasa Kataoka, Satoshi Okuzumi, Ryo Tazaki
The Astrophysical Journal Letters 874 ( 1 ) L6 2019.3
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Effect of dust size and structure on scattered-light images of protoplanetary discs Reviewed
Ryo Tazaki, H Tanaka, T Muto, A Kataoka, S Okuzumi
Monthly Notices of the Royal Astronomical Society 485 ( 4 ) 4951 2019.3
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Temperature Structure in the Inner Regions of Protoplanetary Disks: Inefficient Accretion Heating Controlled by Nonideal Magnetohydrodynamics
Shoji Mori, Xue-Ning Bai, Satoshi Okuzumi
The Astrophysical Journal 2019.2
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Dust Pileup at the Dead-zone Inner Edge and Implications for the Disk Shadow
Takahiro Ueda, Mario Flock, Satoshi Okuzumi
The Astrophysical Journal 2019.1
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Dependence of Hall coefficient on grain size and cosmic ray rate and implication for circumstellar disc formation Reviewed
Shunta Koga, Yusuke Tsukamoto, Satoshi Okuzumi, Masahiro N Machida
Monthly Notices of the Royal Astronomical Society 484 ( 2 ) 2119 - 2136 2019.1
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Y. Tsukamoto, S. Okuzumi, K. Iwasaki, M. N. Machida, S. Inutsuka
The Astrophysical Journal 868 2018.11
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Impacts of Dust Feedback on a Dust Ring Induced by a Planet in a Protoplanetary Disk Reviewed
Kazuhiro D. Kanagawa, Takayuki Muto, Satoshi Okuzumi, Takayuki Tanigawa, Tetsuo Taki, Yuhito Shibaike
The Astrophysical Journal 868 ( 1 ) 48 - 48 2018.11
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Kazumasa Ohno, Satoshi Okuzumi
Astrophysical Journal 859 ( 1 ) 34 - 34 2018.5
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Harvesting the decay energy of 26 Al to drive lightning discharge in protoplanetary discs Reviewed
Anders Johansen, Satoshi Okuzumi
Astronomy and Astrophysics 609 A31 2018.1
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Yusuke Tsukamoto, Satoshi Okuzumi, Kazunari Iwasaki, Masahiro N. Machida, Shu-ichiro Inutsuka
PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN 69 ( 6 ) 95 2017.12
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Shoji Mori, Takayuki Muranushi, Satoshi Okuzumi, Shu-ichiro Inutsuka
ASTROPHYSICAL JOURNAL 849 ( 2 ) 86 - 86 2017.11
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Different modes of star formation: gravitational collapse of magnetically subcritical cloud Reviewed
Masahiro N. Machida, Koki Higuchi, Satoshi Okuzumi
Monthly Notices of the Royal Astronomical Society 473 ( 3 ) 3080 - 3094 2017.10
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Satellitesimal Formation via Collisional Dust Growth in Steady Circumplanetary Disks Reviewed
Yuhito Shibaike, Satoshi Okuzumi, Takanori Sasaki, Shigeru Ida
ASTROPHYSICAL JOURNAL 846 ( 1 ) 81 2017.9
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What pebbles are made of: Interpretation of the V883 Ori disk Reviewed
Djoeke Schoonenberg, Satoshi Okuzumi, Chris W. Ormel
ASTRONOMY & ASTROPHYSICS 605 L2 2017.9
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Magnetically Induced Disk Winds and Transport in the HL Tau Disk Reviewed
Yasuhiro Hasegawa, Satoshi Okuzumi, Mario Flock, Neal J. Turner
ASTROPHYSICAL JOURNAL 845 ( 1 ) 31 2017.8
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Effect of Dust Radial Drift on Viscous Evolution of Gaseous Disk Reviewed
Kazuhiro D. Kanagawa, Takahiro Ueda, Takayuki Muto, Satoshi Okuzumi
ASTROPHYSICAL JOURNAL 844 ( 2 ) 142 2017.8
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Analytic Expressions for the Inner-rim Structure of Passively Heated Protoplanetary Disks Reviewed
Takahiro Ueda, Satoshi Okuzumi, Mario Flock
ASTROPHYSICAL JOURNAL 843 ( 1 ) 49 2017.7
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微惑星形成理論の観測的検証に向けて Reviewed
田崎 亮, 田中 秀和, 奥住 聡, 片岡 章雅, 野村 英子
遊星人 26 ( 2 ) 46 2017.6
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Y. Tsukamoto, S. Okuzumi, A. Kataoka
ASTROPHYSICAL JOURNAL 838 ( 2 ) 151 2017.4
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Kazumasa Ohno, Satoshi Okuzumi
ASTROPHYSICAL JOURNAL 835 ( 2 ) 261 2017.2
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A GAP WITH A DEFICIT OF LARGE GRAINS IN THE PROTOPLANETARY DISK AROUND TW Hya Reviewed
Takashi Tsukagoshi, Hideko Nomura, Takayuki Muto, Ryohei Kawabe, Daiki Ishimoto, Kazuhiro D. Kanagawa, Satoshi Okuzumi, Shigeru Ida, Catherine Walsh, T. J. Millar
ASTROPHYSICAL JOURNAL LETTERS 829 ( 2 ) L35 2016.10
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New Alma Long Baseline Observations Of The Transitional Disk Around Tw Hya
Tsukagoshi, T, Nomura, H, Muto, T, Kawabe, R, Ishimoto, D, Kanagawa, K.D, Okuzumi, S, Ida, S, Walsh, C, Millar, T.J
Resolving planet formation in the era of ALMA and extreme AO 2016.7
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LIGHT SCATTERING BY FRACTAL DUST AGGREGATES. I. ANGULAR DEPENDENCE OF SCATTERING Reviewed
Ryo Tazaki, Hidekazu Tanaka, Satoshi Okuzumi, Akimasa Kataoka, Hideko Nomura
ASTROPHYSICAL JOURNAL 823 ( 2 ) 70 2016.6
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On the water delivery to terrestrial embryos by ice pebble accretion Reviewed
Takao Sato, Satoshi Okuzumi, Shigeru Ida
ASTRONOMY & ASTROPHYSICS 589 A15 2016.5
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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 821 ( 2 ) 82 2016.4
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ALMA OBSERVATIONS OF A GAP AND A RING IN THE PROTOPLANETARY DISK AROUND TW HYA Reviewed
Hideko Nomura, Takashi Tsukagoshi, Ryohei Kawabe, Daiki Ishimoto, Satoshi Okuzumi, Takayuki Muto, Kazuhiro D. Kanagawa, Shigeru Ida, Catherine Walsh, T. J. Millar, Xue-Ning Bai
ASTROPHYSICAL JOURNAL LETTERS 819 ( 1 ) L7 2016.3
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FROM PLANETESIMALS TO PLANETS IN TURBULENT PROTOPLANETARY DISKS. I. ONSET OF RUNAWAY GROWTH Reviewed
Hiroshi Kobayashi, Hidekazu Tanaka, Satoshi Okuzumi
ASTROPHYSICAL JOURNAL 817 ( 2 ) 105 2016.2
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Wladimir Lyra, Alexander J. W. Richert, Aaron Boley, Neal Turner, Mordecai-Mark Mac Low, Satoshi Okuzumi, Mario Flock
ASTROPHYSICAL JOURNAL 817 ( 2 ) 102 2016.2
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Shoji Mori, Satoshi Okuzumi
ASTROPHYSICAL JOURNAL 817 ( 1 ) 52 2016.1
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DEVELOPMENT OF A METHOD FOR THE OBSERVATION OF LIGHTNING IN PROTOPLANETARY DISKS USING ION LINES Reviewed
Takayuki Muranushi, Eiji Akiyama, Shu-ichiro Inutsuka, Hideko Nomura, Satoshi Okuzumi
ASTROPHYSICAL JOURNAL 815 ( 2 ) 84 2015.12
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Y. Tsukamoto, K. Iwasaki, S. Okuzumi, M. N. Machida, S. Inutsuka
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 452 ( 1 ) 278 - 288 2015.9
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BIMODALITY OF CIRCUMSTELLAR DISK EVOLUTION INDUCED BY THE HALL CURRENT Reviewed
Y. Tsukamoto, K. Iwasaki, S. Okuzumi, M. N. Machida, S. Inutsuka
ASTROPHYSICAL JOURNAL LETTERS 810 ( 2 ) L26 2015.9
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Kengo Tomida, Satoshi Okuzumi, Masahiro N. Machida
ASTROPHYSICAL JOURNAL 801 ( 2 ) 117 2015.3
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Satoshi Okuzumi, Shu-ichiro Inutsuka
ASTROPHYSICAL JOURNAL 800 ( 1 ) 47 2015.2
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RADIAL TRANSPORT OF LARGE-SCALE MAGNETIC FIELDS IN ACCRETION DISKS. II. RELAXATION TO STEADY STATES Reviewed
Taku Takeuchi, Satoshi Okuzumi
ASTROPHYSICAL JOURNAL 797 ( 2 ) 132 2014.12
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Satoshi Okuzumi
ASTROPHYSICAL JOURNAL 793 ( 2 ) 143 2014.10
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Opacity of fluffy dust aggregates Reviewed
Akimasa Kataoka, Satoshi Okuzumi, Hidekazu Tanaka, Hideko Nomura
ASTRONOMY & ASTROPHYSICS 568 A42 2014.8
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Satoshi Okuzumi, Taku Takeuchi, Takayuki Muto
ASTROPHYSICAL JOURNAL 785 ( 2 ) 127 2014.4
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ON THE VIABILITY OF THE MAGNETOROTATIONAL INSTABILITY IN CIRCUMPLANETARY DISKS Reviewed
Yuri I. Fujii, Satoshi Okuzumi, Takayuki Tanigawa, Shu-ichiro Inutsuka
ASTROPHYSICAL JOURNAL 785 ( 2 ) 101 2014.4
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Yuri I. Fujii, Satoshi Okuzumi, Shu-ichiro Inutsuka
LABYRINTH OF STAR FORMATION 36 81 - 83 2014
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Rapid planetesimal formation in the inner protoplanetary disk Reviewed
Joanna Drązkowska, Fredrik Windmark, Satoshi Okuzumi
Proceedings of the International Astronomical Union 9 ( S310 ) 208 - 211 2014
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Growth efficiency of dust aggregates through collisions with high mass ratios Reviewed
Koji Wada, Hidekazu Tanaka, Satoshi Okuzumi, Hiroshi Kobayashi, Toru Suyama, Hiroshi Kimura, Tetsuo Yamamoto
ASTRONOMY & ASTROPHYSICS 559 A62 2013.11
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THE FATE OF PLANETESIMALS IN TURBULENT DISKS WITH DEAD ZONES. I. THE TURBULENT STIRRING RECIPE Reviewed
Satoshi Okuzumi, Chris W. Ormel
ASTROPHYSICAL JOURNAL 771 ( 1 ) 43 2013.7
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Takayuki Muranushi, Satoshi Okuzumi, Shu-ichiro Inutsuka
ASTROPHYSICAL JOURNAL 771 ( 2 ) 138 2013.7
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RADIATION MAGNETOHYDRODYNAMIC SIMULATIONS OF PROTOSTELLAR COLLAPSE: PROTOSTELLAR CORE FORMATION Reviewed
Kengo Tomida, Kohji Tomisaka, Tomoaki Matsumoto, Yasunori Hori, Satoshi Okuzumi, Masahiro N. Machida, Kazuya Saigo
ASTROPHYSICAL JOURNAL 763 ( 1 ) 2013.1
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Ormel, CW, Okuzumi, Satoshi
The Astrophysical Journal 771 ( 1 ) 44 - 44 2013
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Static compression of porous dust aggregates Reviewed
A. Kataoka, H. Tanaka, S. Okuzumi, K. Wada
Astronomy and Astrophysics 554 A4 2013
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Nonlinear Ohm's Law: Electric-Field Heating of Plasmas in Protoplanetary Disks Reviewed
Okuzumi Satoshi, Inutsuka Shu-ichiro
Protostars and Planets VI Posters 2013
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Exposing the Long Lives of Circumplanetary Disks Reviewed
Fujii Yuri, Okuzumi S, Tanigawa T, Inutsuka S
AAS/Division for Planetary Sciences Meeting Abstracts 45 2013
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Fluffy dust forms icy planetesimals by static compression Reviewed
Akimasa Kataoka, Hidekazu Tanaka, Satoshi Okuzumi, Koji Wada
Astronomy and Astrophysics 557 L4 2013
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INTERDEPENDENCE OF ELECTRIC DISCHARGE AND MAGNETOROTATIONAL INSTABILITY IN PROTOPLANETARY DISKS Reviewed
Takayuki Muranushi, Satoshi Okuzumi, Shu-ichiro Inutsuka
ASTROPHYSICAL JOURNAL 760 ( 1 ) 56 2012.11
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INTERDEPENDENCE OF ELECTRIC DISCHARGE AND MAGNETOROTATIONAL INSTABILITY IN PROTOPLANETARY DISKS Reviewed
Takayuki Muranushi, Satoshi Okuzumi, Shu-ichiro Inutsuka
ASTROPHYSICAL JOURNAL 760 ( 1 ) 2012.11
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Geometric cross sections of dust aggregates and a compression model for aggregate collisions Reviewed
Toru Suyama, Koji Wada, Hidekazu Tanaka, Satoshi Okuzumi
Astrophysical Journal 753 ( 2 ) 2012.7
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Satoshi Okuzumi, Shigenobu Hirose
ASTROPHYSICAL JOURNAL LETTERS 753 ( 1 ) L8 2012.7
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Satoshi Okuzumi, Hidekazu Tanaka, Hiroshi Kobayashi, Koji Wada
Astrophysical Journal 752 ( 2 ) 2012.6
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Radiation magnetohydrodynamic simulations of protostellar collapse: protostellar core formation Reviewed
Tomida, Kengo, Tomisaka, Kohji, Matsumoto, Tomoaki, Hori, Yasunori, Okuzumi, Satoshi, Machida, Masahiro N., Saigo, Kazuya
The Astrophysical Journal 763 ( 1 ) 6 - 6 2012
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Okuzumi, Satoshi, Tanaka, Hidekazu, Kobayashi, Hiroshi, Wada, Koji
The Astrophysical Journal 752 ( 2 ) 106 - 106 2012
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Geometric Cross Sections of Dust Aggregates and a Compression Model for Aggregate Collisions Reviewed
Suyama, Toru, Wada, Koji, Tanaka, Hidekazu, Okuzumi, Satoshi
The Astrophysical Journal 753 ( 2 ) 115 - 115 2012
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Growth of Cosmic Dust Aggregates and Reexamination of Particle Interaction Models
Hidekazu Tanaka, Koji Wada, Toru Suyama, Satoshi Okuzumi
PROGRESS OF THEORETICAL PHYSICS SUPPLEMENT ( 195 ) 101 - 113 2012
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MODELING MAGNETOROTATIONAL TURBULENCE IN PROTOPLANETARY DISKS WITH DEAD ZONES Reviewed
Satoshi Okuzumi, Shigenobu Hirose
ASTROPHYSICAL JOURNAL 742 ( 2 ) 65 2011.12
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Yuri I. Fujii, Satoshi Okuzumi, Shu-ichiro Inutsuka
ASTROPHYSICAL JOURNAL 743 ( 1 ) 53 2011.12
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Satoshi Okuzumi, Hidekazu Tanaka, Taku Takeuchi, Masa-aki Sakagami
ASTROPHYSICAL JOURNAL 731 ( 2 ) 95 2011.4
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Satoshi Okuzumi, Hidekazu Tanaka, Taku Takeuchi, Masa-aki Sakagami
ASTROPHYSICAL JOURNAL 731 ( 2 ) 96 2011.4
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Coevolution of dust and magnetic turbulence in protoplanetary disks [in Japanese] Reviewed
Okuzumi, S, Hirose, S
Planetary People 20 ( 1 ) 42 - 51 2011.3
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Dust Charging in Protoplanetary Disks: Introducing Electrostatics to Planetesimal Formation Theories
OKUZUMI SATOSHI
天文月報 104 ( 3 ) 126 - 136 2011.2
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Induced turbulence and the density structure of the dust layer in a protoplanetary disk Reviewed
Takeuchi, Taku, Muto, Takayuki, Okuzumi, Satoshi, Ishitsu, Naoki, Ida, Shigeru
The Astrophysical Journal 744 ( 2 ) 101 - 101 2011
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Theoretical Modeling of the Charging and Structure Evolution of Dust Aggregates in Protoplanetary Disks: Possible Discovery of an Electrostatic Barrier Against Dust Growth
Okuzumi, Satoshi
2010
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NUMERICAL MODELING OF THE COAGULATION AND POROSITY EVOLUTION OF DUST AGGREGATES Reviewed
Satoshi Okuzumi, Hidekazu Tanaka, Masa-Aki Sakagami
ASTROPHYSICAL JOURNAL 707 ( 2 ) 1247 - 1263 2009.12
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地上の星 遷音速流でつくる「音のブラックホール」
奥住聡, 富永真太郎, 阪上雅昭
ながれ 28 ( 5 ) 391 - 398 2009.10
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ELECTRIC CHARGING OF DUST AGGREGATES AND ITS EFFECT ON DUST COAGULATION IN PROTOPLANETARY DISKS Reviewed
Satoshi Okuzumi
ASTROPHYSICAL JOURNAL 698 ( 2 ) 1122 - 1135 2009.6
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Numerical modeling of the coagulation and porosity evolution of dust aggregates Reviewed
Okuzumi, Satoshi, Tanaka, Hidekazu, Sakagami, Masa-aki
The Astrophysical Journal 707 ( 2 ) 1247 - 1247 2009
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Electric Charging of Dust Aggregates and its Effect on Dust Coagulation in Protoplanetary Disks Reviewed
Satoshi Okuzumi, Hidekazu Tanaka, Masa-aki Sakagami
EXOPLANETS AND DISKS: THEIR FORMATION AND DIVERSITY 1158 149 - + 2009
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Creating Black Holes in the Lab: Experimental Studies of Black Hole Physics Using Transonic Flow
OKUZUMI SATOSHI, SAKAGAMI MASAAKI
日本物理学会誌 63 ( 11 ) 845 - 851 2008.11
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Possible discovery of a nonlinear tail and second-order quasinormal modes in black hole ringdown Reviewed
Satoshi Okuzumi, Kunihito Ioka, Masa-aki Sakagami
PHYSICAL REVIEW D 77 ( 12 ) 2008.6
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Possible discovery of a nonlinear tail and second-order quasinormal modes in black hole ringdown Reviewed
Okuzumi, Satoshi, Ioka, Kunihito, Sakagami, Masa-aki
Physical Review D 77 ( 12 ) 124018 - 124018 2008
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Quasinormal ringing of acoustic black holes in Laval nozzles: Numerical simulations Reviewed
Satoshi Okuzumi, Masa-Aki Sakagami
Physical Review D - Particles, Fields, Gravitation and Cosmology 76 ( 8 ) 084027 2007.10
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Quasinormal ringing of acoustic black holes in Laval nozzles: Numerical simulations Reviewed
Satoshi Okuzumi, Masa-Aki Sakagami
PHYSICAL REVIEW D 76 ( 8 ) 2007.10
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高速プラズマ流と衝撃波の研究事始め 4.宇宙における高速流と衝撃波研究の最前線 4.4 ホーキング輻射の謎と遷音速流による模擬実験
奥住聡, 阪上雅昭
プラズマ・核融合学会誌 83 ( 4 ) 387 - 390 2007.4
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Quasinormal ringing of acoustic black holes
Satoshi Okuzumi, Masa-Aki Sakagami
Proceedings of the 16th Workshop on General Relativity and Gravitation in Japan, JGRG 2006 167 - 170 2006
MISC
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黒澤, 耕介, 佐藤, 雅彦, 大野, 遼, 新原, 隆史, 中澤, 風音, 奥住, 聡, 村主, 崇行, 長谷川, 直, KUROSAWA, Kosuke, SATO, Masahiko, ONO, Haruka, NIIHARA, Takafumi, NAKAZAWA, Kanon, OKUZUMI, Satoshi, MURANISHI, Takayuki, HASEGAWA, Sunao
令和2年度宇宙科学に関する室内実験シンポジウム 講演集 = Proceedings of 2021 Symposium on Laboratory Experiment for Space Science 2021.3
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黒澤, 耕介, 中澤, 風音, 佐藤, 雅彦, 奥住, 聡, 村主, 崇行, 長谷川, 直, KUROSAWA, Kosuke, NAKAZAWA, Kanon, SATO, Masahiko, OKUZUMI, Satoshi, MURANUSHI, Takayuki, HASEGAWA, Sunao
令和元年度宇宙科学に関する室内実験シンポジウム 講演集 = Proceedings of 2020 Symposium on Laboratory Experiment for Space Science 2020.3
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Discovery of An au-scale Excess in Millimeter Emission from the Protoplanetary Disk around TW Hya
Takashi Tsukagoshi, Takayuki Muto, Hideko Nomura, Ryohei Kawabe, Kazuhiro D. Kanagawa, Satoshi Okuzumi, Shigeru Ida, Catherine Walsh, Tom J. Millar, Sanemichi Z. Takahashi, Jun Hashimoto, Taichi Uyama, Motohide Tamura
The Astrophysical Journal Letters 2019.6
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黒澤, 耕介, 岩澤, 聖徳, 奥住, 聡, 村主, 崇行, 長谷川, 直, Kurosawa, Kosuke, Iwasawa, Masanori, Okuzumi, Satoshi, Muranushi, Takayuki, Hasegawa, Sunao
平成30年度宇宙科学に関する室内実験シンポジウム 講演集 = Proceedings of 2019 Symposium on Laboratory Experiment for Space Science 2019.2
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黒澤, 耕介, 村主, 崇行, 奥住, 聡, 長谷川, 直, Kurosawa, Kosuke, Muranushi, Takayuki, Okuzumi, Satoshi, Hasegawa, Sunao
平成29年度宇宙科学に関する室内実験シンポジウム 講演集 = Proceedings of 2018 Symposium on Laboratory Experiment for Space Science 2018.2
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Report of the 5th Workshop on Satellite Systems
Tanigawa Takayuki, Kimura Jun, Okuzumi Satoshi, Sekine Yasuhito, Kuramoto Kiyoshi, Ohtsuki Keiji, Tanaka Hidekazu
Planetary People - The Japanese Society for Planetary Sciences 26 ( 4 ) 190 - 191 2017
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Modeling Dust and Turbulence in Protoplanetary Disks : A New Picture of Planetesimal Formation
109 ( 12 ) 833 - 842 2016.12
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Report of Workshop on Satellite Systems 2015
Tanigawa T., Kimura J., Sekine Y., Kuramoto K., Ohtsuki K., Tanaka H., Okuzumi S.
Planetary People - The Japanese Society for Planetary Sciences 24 ( 4 ) 343 - 345 2015
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Report of Workshop on Satellite Systems
Tanigawa T, Okuzumi S, Kimura J, Kuramoto K, Ohtsuki K
Planetary People 23 ( 4 ) 386 - 388 2014.12
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O4-01 微惑星サイズと乱流の関係(口頭発表セッション4 惑星形成II,口頭発表)
小林 浩, 田中 秀和, 奥住 聡
日本惑星科学会秋期講演会予稿集 2014 "O4 - 01" 2014.9
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P1-16 モノマーサイズ分布のあるダストアグリゲイトの衝突とイジェクタ量(ポスターセッション1,ポスター発表)
和田 浩二, 田中 秀和, 小林 浩, 奥住 聡, 木村 宏
日本惑星科学会秋期講演会予稿集 2014 "P1 - 16" 2014.9
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S01 高空隙ダストの静的圧縮を考慮した微惑星形成(特別セッション(最優秀発表賞選考),口頭発表)
片岡 章雅, 田中 秀和, 奥住 聡, 和田 浩二
日本惑星科学会秋期講演会予稿集 2013 S01 2013.11
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Report of Workshop on Satellite Systems
Tanigawa T., Okuzumi S., Kimura J., Kuramoto K., Ohtsuki K.
Planetary People - The Japanese Society for Planetary Sciences 22 ( 4 ) 274 - 276 2013
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Report of the Mini Workshop on the Formation of Satellite Systems
TANIGAWA T, OKUZUMI S, KURAMOTO K, OHTSUKI K
Planetary People 21 ( 4 ) 377 - 379 2012.12
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O8-06 原始惑星系円盤におけるダストの静的圧縮過程(口頭発表セッション8(室内実験II,惑星形成論I),口頭発表)
片岡 章雅, 田中 秀和, 奥住 聡, 和田 浩二
日本惑星科学会秋期講演会予稿集 2012 71 - 71 2012.10
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S07 周惑星円盤ガスの降着過程についての理論的解析(特別セッション:最優秀発表賞選考,口頭発表)(ポスターセッション1,ポスター発表)
藤井 悠里, 奥住 聡, 谷川 享行, 犬塚 修一郎
日本惑星科学会秋期講演会予稿集 2012 7 - 7 2012.10
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108,P001 原始惑星系円盤における帯電ダストの合体成長(オーラルセッション2 最優秀発表賞選考,最優秀発表賞選考エントリーポスター,ポスターセッション1)
奥住 聡, 田中 秀和, 阪上 雅昭
日本惑星科学会秋期講演会予稿集 2009 8 - 8 2009.9
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28pSP-1 Coagulation of charged dust aggregates in protoplanetary disks
Okuzumi Satoshi, Tanaka Hidekazu, Sakagami Masa-aki
Meeting abstracts of the Physical Society of Japan 64 ( 1 ) 225 - 225 2009.3
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Possible discovery of nonlinear tail and quasinormal modes in black hole ringdown Reviewed
S. Okuzumi, K. Ioka, M.-A. Sakagami
Journal of Physics: Conference Series 154 2009
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26aSG-8 Quasinonnal ringing of acoustic black holes
Okuzumi Satoshi, Sakagami Masa-aki
Meeting abstracts of the Physical Society of Japan 62 ( 1 ) 98 - 98 2007.2
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IX-4 Puzzles of Hawking Radiation and its Simulation by Transonic Flow
Sakagami Masa-aki, Okuzumi Satoshi
( 23 ) 54 - 54 2006
Awards
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2020年度理学院教員教育賞
2021.2 東京工業大学
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平成30年度科学技術分野の文部科学大臣表彰 若手科学者賞
2018.4
奥住 聡
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平成28年度東工大挑戦的研究賞・学長特別賞
2016.8 東京工業大学
奥住 聡
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2015年度研究奨励賞
2016.3 日本天文学会
奥住 聡
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平成26年度理学系若手研究奨励賞
2014.12 東京工業大学
奥住 聡
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Outstanding Young Scientist Award of the Year 2013
2014.4 The Japanese Society for Planetary Sciences
Satoshi Okuzumi
Research Projects
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隕石のマルチスケール揮発性元素組成分析により解き明かすD型小惑星の起源と進化
Grant number：25K00025 2025.4 - 2028.3
日本学術振興会 科学研究費助成事業 基盤研究(B)
深井 稜汰, 林 佑, 奥住 聡, 荒川 創太
Grant amount：\18720000 （ Direct Cost: \14400000 、 Indirect Cost：\4320000 ）
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Constructing the theory of rocky planet formation in cold protoplanetary disks
Grant number：23K25923 2023.4 - 2027.3
Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)
Grant amount：\18720000 （ Direct Cost: \14400000 、 Indirect Cost：\4320000 ）
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Constructing the theory of rocky planet formation in cold protoplanetary disks
Grant number：23H01227 2023.4 - 2027.3
Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)
Grant amount：\18720000 （ Direct Cost: \14400000 、 Indirect Cost：\4320000 ）
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Meteoritic and theoretical studies on the origin of isotopic dichotomy in meteorites
Grant number：23H00143 2023.4 - 2027.3
Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (A)
Grant amount：\47060000 （ Direct Cost: \36200000 、 Indirect Cost：\10860000 ）
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Exploring Substructure Formation in Infant Protoplanetary-Disks
Grant number：20H00182 2020.4 - 2025.3
Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (A) Grant-in-Aid for Scientific Research (A)
Grant amount：\44980000 （ Direct Cost: \34600000 、 Indirect Cost：\10380000 ）
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Construction of an unifying model of formation and evolution of primordial material in the solar system
Grant number：20H00205 2020.4 - 2025.3
Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (A) Grant-in-Aid for Scientific Research (A)
Grant amount：\44330000 （ Direct Cost: \34100000 、 Indirect Cost：\10230000 ）
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A new scenario of dust growth in protoplanetary disks explored through large-scale direct numerical simulations of turbulence
Grant number：20H01948 2020.4 - 2024.3
Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B) Grant-in-Aid for Scientific Research (B)
Grant amount：\16900000 （ Direct Cost: \13000000 、 Indirect Cost：\3900000 ）
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Snow lines at the origin of multiple dust rings in protoplanetary disks
Grant number：19K03926 2019.4 - 2022.3
Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C) Grant-in-Aid for Scientific Research (C)
Okuzumi Satoshi
Grant amount：\4290000 （ Direct Cost: \3300000 、 Indirect Cost：\990000 ）
High-resolution observations of disks by the ALMA radio telescope have revealed that dust rings are distributed in protoplanetary disks. Some models suggest that such dust rings may form around snow lines, where volatiles sublimate. In this study, we developed an accurate model for the disk temperature distribution needed for accurate prediction of the location of the snow line. We further examined the possibility that dust rings formed around snow lines may lead to planet formation. We found that snow lines can be everywhere in disks due to the instability of the disk temperature distribution. We also found that dust rings forming around snow lines can produce planetesimals when the radial inward flux of dust in the disk is high.
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大規模数値計算によるダスト付着成長の微物理の発展
Grant number：19K03941 2019.4 - 2022.3
日本学術振興会 科学研究費助成事業 基盤研究(C) 基盤研究(C)
田中 秀和, 和田 浩二, 奥住 聡, 田中 今日子
Grant amount：\4290000 （ Direct Cost: \3300000 、 Indirect Cost：\990000 ）
ALMAにより明らかにされた多数の原始惑星系円盤におけるリング状の間隙構造は焼結したダストの衝突合体を起こしにくい性質により形成されたとする説が提唱されている。また最近のALMA偏光観測より円盤ダストは比較的密な構造を持つことが示唆されているが焼結したダストの衝突合体は跳ね返りの効果で密な構造をつくることも予想されている。昨年度の研究で、跳ね返り条件はダストの配位数（構成粒子1つに対する接触点数）が重要であることが示されていた。
本年度は衝突で生成された様々な配位数をもつダストに対する跳ね返り条件を調べ、また配位数の増加過程についても調べた。その結果、焼結領域においてその場成長したダストは配位数の増加が押さえられ成長を継続でき、一方外側の低温領域で成長した後に焼結領域へ入ってきたダストは配位数が大きく、焼結による成長阻害が効くことが明かになった。
次に、ダスト衝突合体に対する衝突ダストの質量比依存性を調べた。特に質量比が3倍程度の時に破壊が最も起こりやすいことが明らかになった。この成果については論文投稿し印刷中である。衝突で発生した破片総量やサイズ分布についても詳細に調べる予定である。
さらに、ダスト衝突時の圧縮過程において2体の衝突ダストの間で充填率に差がある場合には従来モデルより大幅に圧縮が起きやすいという注目すべき現象も明らかになっている。今後これらについてもさらに詳しく調べる予定である。 -
Theory for the Formation of Planetary Systems from Diverse Protoplanetary Disks
Grant number：18H05438 2018.6 - 2023.3
Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area) Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)
Grant amount：\122200000 （ Direct Cost: \94000000 、 Indirect Cost：\28200000 ）
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Impact-induced lightning: A new perspective on the paleoenvironment of planets
Grant number：17K18812 2017.6 - 2020.3
Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Grant-in-Aid for Challenging Research (Exploratory) Grant-in-Aid for Challenging Research (Exploratory)
Kurosawa Kosuke
Grant amount：\6370000 （ Direct Cost: \4900000 、 Indirect Cost：\1470000 ）
Impact-generated ejecta curtains produced by hypervelocity impacts onto planets are investigated using experimental, analytical and numerical methods. It is found that no large-scale discharge structures are generated in typical spatial and time scales of laboratory impact experiments. The analytic and numerical models were developed to analysis the mutual collisions between the constituent micro particles of ejecta curtains. We have reproduced the mesh-like patterns of ejecta curtains observed in the laboratory experiments. In the future, we will investigate the possibility whether lightning discharges occur in ejecta curtain.
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Modeling the coevolution of dust and the snow line in protoplanetary disks
Grant number：16K17661 2016.4 - 2019.3
Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Grant-in-Aid for Young Scientists (B) Grant-in-Aid for Young Scientists (B)
Okuzumi Satoshi, MORI shoji, TAZAKI ryo, HOMMA kazuaki
Grant amount：\4030000 （ Direct Cost: \3100000 、 Indirect Cost：\930000 ）
Planets form in gas disks around young stars. These protoplanetary disks have an inner region where water cannot exist in its solid form. The outer boundary of this ice-free region is called the snow line. In this study, we investigated the efficiency of disk heating due to Joule dissipation, finding that the heating is so inefficient that the snow line in the solar nebula must have located interior to the current orbit of the Earth. We also developed a numerical model that can treat dust growth and disk temperature evolution, and discovered a new mechanism by which icy small solid bodies promptly form in a region outside the snow line.
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Decoding the origin of solar system from the isotope anomalies of heavy elements in meteorites
Grant number：16H04081 2016.4 - 2019.3
Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B) Grant-in-Aid for Scientific Research (B)
Yokoyama Tetsuya
Grant amount：\17680000 （ Direct Cost: \13600000 、 Indirect Cost：\4080000 ）
The aim of this research is to derive a new planet formation theory by measuring isotope anomalies of heavy elements in meteorites and constraining the dynamic history of precursor materials of planetesimals. The isotopic compositions of Sr, Nd, and Mo in meteorites revealed the presence of two isotopically distinct reservoirs in the early solar system where parent bodies of meteorites were formed. In particular, the outer asteroid belt was found to be enriched in components derived from supernovae. Such isotopic variability is caused by the heterogeneous distribution of s- and r-process nuclides in the early solar system, which was triggered by the selective destruction of dust grains by nebular thermal processing in the inner solar system, followed by the transportation of recrystallized-silicate dusts into the outer solar system.
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Constructing a standard formation model of satellites around gas giant planets
Grant number：15H02065 2015.4 - 2020.3
Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (A) Grant-in-Aid for Scientific Research (A)
Ida Shigeru
Grant amount：\41210000 （ Direct Cost: \31700000 、 Indirect Cost：\9510000 ）
Toward construction of a standard theoretical model for moon formation around general gas giant planets, which has not been addressed, we performed state-of-arts fluid dynamical, gravitational N-body, and statistical Monte Carlo simulations. Using the simulation results of gas inflow to a circumplanetary disk, we suggested the growth mode of a solid core in a gas giant. Through N-body simulations, we showed that orbit crossing occurred between Enceladus, a Saturnian moon, and other moons and the associated tidal heating is enough to maintain Enceladus geyser activity with assistance of the moon-ring gravitational interactions. Based in these results, we published a review article on current understanding of Saturnian moon formation in Science. We also showed that the orbital configurations and chemical compositions of Galilean moons are reproduced if a modern model of a circumplanetary disk is used.
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原始惑星系円盤における大局磁場とガス降着の共進化
Grant number：26400224 2014.4 - 2016.3
日本学術振興会 科学研究費助成事業 基盤研究(C) 基盤研究(C)
竹内 拓, 奥住 聡, 武藤 恭之, 廣瀬 重信
Grant amount：\4680000 （ Direct Cost: \3600000 、 Indirect Cost：\1080000 ）
本研究は、原始惑星系円盤などの降着円盤において、円盤を貫く星間磁場がどのような形状になっているか、また星間磁場を種とする乱流の強さ、および円盤の降着率はどの程度になるかを理論的に解き明かすことを目的としている。
これまでの研究で、円盤の降着速度が与えられた場合の磁場形状の定常解の解析的な導出および、磁場のみの時間進化を求めることに成功している。平成27年度は、円盤の密度と磁場構造の同時進化の研究を行った。これまでに開発したデッドゾーンがある場合でのガスと磁束の移流速度のモデル化を使った。このモデルでは、移流速度は、磁場強度および電離度を通して面密度の関数となる。われわれは円盤内側のデッドゾーンとその外側の磁気乱流が活発な場所との境界に着目し、そこでの微小な摂動に対する線形安定性を調べ、そこが粘性不安定を持つことがわかった。さらに、密度と磁場の時間進化を数値的に解いて、非線形発展を調べたところ、デッドゾーン境界に密度が濃い部分と薄い部分が縞状に現れ、その後100万年程度で消失することがわかった。この縞の幅は、現在の計算では数値的なグリッドサイズで決まっているが、現実の円盤では他の流体不安定や熱拡散で決まると考えられる。デッドゾーン境界での詳細な密度構造を求めるにはさらなる数値シミュレーションが必要であるが、本研究成果は、年齢１００万年程度の円盤に特徴的な縞状構造が現れることを予言しており、近い将来の高分解能観測によって検証できると考えられる。
また、円盤中心部には密度の低い領域が現れることも数値計算によって示され、観測されているいくつかの遷移円盤を形成するメカニズムの一つになると考えられる。 -
Modeling the coevolution of dust and magnetic turbulence in planetesimal formation stages
Grant number：25887023 2013.8 - 2015.3
Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Grant-in-Aid for Research Activity Start-up Grant-in-Aid for Research Activity Start-up
OKUZUMI Satoshi, TAKEUCHI Taku, MORI Shoji
Grant amount：\2730000 （ Direct Cost: \2100000 、 Indirect Cost：\630000 ）
Planet formation begins with the growth of dust grains to planetesimals. In this research project, we have focused on the roles of protoplanetary disk turbulence in planetesimal formation processes and have investigated how the intensive of magnetic disk turbulence evolves with dust growth. Specifically, (1) we analyzed the transport of magnetic fluxes (the seeds of magnetic turbulence) within a protoplanetary disk, and found that there is an upper limit on the magnetic flux strength in a steady disk; (2) we for the first time modeled plasma heating by magnetic disk turbulence, and found that the heated plasma stabilizes the magnetic turbulence, promotes grains’ negative charging, and thereby slows down the collisional growth of the grains.
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Formation theory of habitable terrestrial planets
Grant number：23103005 2011.4 - 2016.3
Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area) Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)
IDA SHIGERU
Grant amount：\141960000 （ Direct Cost: \109200000 、 Indirect Cost：\32760000 ）
Regarding formation of protostars and protoplanetary disks, we have constructed a new scenario that a disk is formed at the stage of a Jupiter-mass star and the disk fragment into clumps to fall onto the star. Regarding planetesimal formation, through analysis of simultaneous evolution of dust size, porosity and orbit, we found that icy planetesimals are successfully formed. Regarding comparison of theory with observed data, we performed Monte Carlo simulations to reproduce the orbital eccentricity distribution of exoplanets. Our study of planetary atmosphere acquired from the disk could explain diversity of bulk density of extrasolar super-Earths. We also proposed two theoretical models to explain the ring structure in the disks that were revealed by ALMA observations.
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塵粒子集合体の電気力学及び構造力学的進化が駆動する微惑星形成
Grant number：10J07006 2010 - 2012
日本学術振興会 科学研究費助成事業 特別研究員奨励費 特別研究員奨励費
奥住 聡
Grant amount：\6000000 （ Direct Cost: \6000000 ）
従来の惑星形成理論では、付着成長を通じて形成される塵粒子集合体(ダストアグリゲイト)をコンパクトな球とみなすという著しい簡単化がなされていた。しかしながら、近年の実験室および数値実験によると、ダスト粒子は付着成長を通じて極めて低い内部密度を持つアグリゲイトへと進化することが明らかになっている。本研究員は、合体成長・内部密度進化・軌道進化を同時かつ無矛盾に考慮した円盤ダスト進化数値シミュレーションを世界に先駆けて行った。その結果、低密度化に伴うダストの空気力学的特性の変化がダストの急速な成長をもたらし、微惑星形成理論における最大の難題の1つであった「ダストの中心星落下問題」が回避されることを示した。さらに、塵粒子集合体の構造進化の観測的実証を目指し、低密度のアグリゲイトモデルを用いて原始惑星系円盤のミリ波放射光の時間進化の理論予測を行った。その結果、ダストの急速成長が中心星近傍における円盤ミリ波放射の欠損をもたらし、すでに観測されている「ミリ波遷移円盤」と類似の放射構造が自然に説明されることを明らかにした。
一方、原始惑星系円盤中の乱流は惑星形成に対して決定的な影響を与えることが知られている。本研究員は、原始惑星系円盤における主要な乱流である磁気流体力学的乱流(磁気乱流)を考慮した微惑星形成の数値シミュレーションを実施し、その結果、微惑星形成が阻害されないためには大局的磁束強度が10mG程度でなければならないことを示した。円盤大局磁束の強度は、分子雲コアから原始惑星系円盤が形成される段階で、ある程度決定すると考えられている。本研究成果は、「円盤形成期における磁場の輸送進化がその後の惑星形成過程を決定付ける」というこれまでにない新しい視点を提供するものである。 -
音響ブラックホールモデルを用いたブラックホール物理の解明
Grant number：08J04371 2008 - 2009
日本学術振興会 科学研究費助成事業 特別研究員奨励費 特別研究員奨励費
奥住 聡
Grant amount：\1200000 （ Direct Cost: \1200000 ）
ブラックホールとは、一般相対性理論からその存在が予言される天体である。近年になって、ブラックホールの関与するいくつかの新しい波動現象が予言された。これらの予言を実証することは、一般相対性理論のより精密な検証に繋がるものであるが、これらを天文観測から直接実証することは現在では困難である。本研究の目的は、(1)これらの現象を詳細に解析するための理論的に整備すること、(2)地上実験が可能なブラックホール擬似モデルである「音のブラックホール」を利用し、これらの現象の存否を実証すること、の2点である。本年度の研究成果は以下の2点に要約される。
1.ブラックホールは「準固有振動」と呼ばれる重力波を放出することが知られる。ごく最近、一般相対性理論の非線形効果が周波数の異なる準固有振動を生み出すことが予想された(Ioka & Nakano 2007)。しかし、この先行研究で用いられた解析手法の妥当性は大いに疑問が残されていた。本研究では、非線形な重力波に対しても妥当性が保証される新たな解析手法を独自に開発し、先行研究で予言されていた非線形由来の準固有振動が実際に存在することを証明した。さらに副産物として、準固有振動とは別種の未知なる重力波モードを発見した。この現象は近い将来観測されるであろう重力波形に大きな影響を与えると予想される。本研究業績は国際論文誌「Journal of Physics」において発表した。
2.ブラックホールは「ホーキング輻射」と呼ばれる熱輻射を放出することが予言されている。近年、高エネルギー領域での量子論的効果がこの輻射のスペクトルを変形させる可能性が指摘された(Barcelo et al.2009)。本研究では、ホーキング輻射のスペクトルを実験的に特定するための手段として、量子論的効果が現れる流体である「ボース・アインシュタイン凝縮体」に注目し、これを用いた音響ブラックホールを現在の技術で実現するための方策を提案した。本研究業績は国内論文誌「ながれ」において発表した。
Teaching Experience
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力学（地惑）
Institution：東京工業大学
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電磁気学