On the probability of moons formation

• Project/Area Number: 15K13562
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Solid earth and planetary physics
• Research Institution: Tokyo Institute of Technology
• Principal Investigator: GENDA Hidenori 東京工業大学, 地球生命研究所, 特任准教授 (90456260)
• Research Collaborator: CHARNOZ Sebastian ; ROSENBLATT Pascal ; HYODO Ryuki
• Project Period (FY): 2015-04-01 – 2017-03-31
• Project Status: Completed (Fiscal Year 2016)
• Budget Amount: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000); Fiscal Year 2016: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000); Fiscal Year 2015: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
• Keywords: 巨大天体衝突 / 地球型惑星形成 / 円盤進化 / 衛星形成 / ジャイアントインパクト / 月形成 / 原始月円盤 / 潮汐進化

Outline of Final Research Achievements

We developed the new numerical code that includes the orbital evolution of protoplanets and collisional process of them. We carried out 10 simulations of terrestrial planet formation, and extracted the impact conditions for giant impacts. First we focused on the Martian moons, and discussed the possibility of their formation via a giant impact onto Mars. Next we showed that Pluto's satellite Charon can also be formed by a giant impact that happened in the outer solar system.

Research Products

• [Int'l Joint Research] Institut de Physique du Globe/Universite Paris Diderot/Institut de Physique de Rennes(フランス)
• [Int'l Joint Research] Royal Observatory of Belgium(ベルギー)
• [Int'l Joint Research] Chinese Academy of Sciences(中国)
• [Int'l Joint Research] University of Vienna/Austrian Academy Sci. Space Res. Inst.(オーストリア)
• [Int'l Joint Research] Inst. Astron. Russian Academy Sci.(ロシア連邦)
• [Journal Article] Ring formation around giant planets by tidal disruption of a single passing large Kuiper belt object (2017)
  • Author(s): Ryuki Hyodo, Sebastien Charnoz, Keiji Ohtsuki, Hidenori Genda
  • Journal Title: Icarus Volume: 282, 15 Pages: 195-213
  • DOI: 10.1016/j.icarus.2016.09.012
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] The Charon-forming giant impact as a source of Pluto's equatorial dark regions (2017)
  • Author(s): Sekine, Y., H. Genda, S. Kamata, T. Funatsu
  • Journal Title: Nature Astronomy Volume: 1 Issue: 2 Pages: 1-6
  • DOI: 10.1038/s41550-016-0031
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Impact erosion model for gravity-dominated planetesimals (2017)
  • Author(s): Genda, H., Fujita, T., Kobayashi, H., Tanaka, H., Suetsugu, R., and Abe, Y.
  • Journal Title: Icarus Volume: 印刷中 Pages: 234-246
  • DOI: 10.1016/j.icarus.2017.03.009
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Ejection of iron-bearing giant-impact fragments and the dynamical and geochemical influence of the fragment re-accretion (2017)
  • Author(s): Genda, H., Iizuka, T., Sasaki, T., Ueno, Y., and Ikoma, M.
  • Journal Title: Earth and Planetary Science Letters Volume: 印刷中
  • Peer Reviewed
• [Journal Article] Accretion of Phobos and Deimos in an extended debris disc stirred by transient moons (2016)
  • Author(s): Pascal Rosenblatt, Sebastien Charnoz, Kevin M Dunseath, Mariko Terao-Dunseath, Antony Trinh, Ryuki Hyodo, Hidenori Genda, Steven Toupin
  • Journal Title: Nature Geoscience Volume: 9 Issue: 8 Pages: 581-583
  • DOI: 10.1038/ngeo2742
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] FORMATION OF CENTAURS' RINGS THROUGH THEIR PARTIAL TIDAL DISRUPTION DURING PLANETARY ENCOUNTERS (2016)
  • Author(s): Ryuki Hyodo, Sebastien Charnoz, Hidenori Genda, Keiji Ohtsuki
  • Journal Title: The Astrophysical Journal Letters Volume: 828 Issue: 1 Pages: L8-L8
  • DOI: 10.3847/2041-8205/828/1/l8
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Formation and Evolution of Protoatmospheres (2016)
  • Author(s): Massol, H., Hamano K., Tian F., Ikoma M., Abe, Y.., Chassefiere E., Davaille A., Genda H., Gudel M., Hori Y., Leblanc F., Marcq E., Sarda P., Shematovich, V. I., Stokl, A. and Lammer H
  • Journal Title: Space Science Reviews Volume: Volume 205, Issue 1-4, Issue: 1-4 Pages: 153-211
  • DOI: 10.1007/s11214-016-0280-1
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] The Giant Impact Simulations with Density Independent Smoothed Particle Hydrodynamics (2016)
  • Author(s): Hosono, N., Saitoh, T. R., Makino, J., Genda, H., and Ida, S.
  • Journal Title: Icarus Volume: 271 Pages: 131-157
  • DOI: 10.1016/j.icarus.2016.01.036
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Origin of Earth’s oceans: An assessment of the total amount, history and supply of water (2016)
  • Author(s): Genda, H.
  • Journal Title: GEOCHEMICAL JOURNAL Volume: 50 Issue: 1 Pages: 27-42
  • DOI: 10.2343/geochemj.2.0398
  • NAID: 130005124704
  • ISSN: 0016-7002, 1880-5973
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Rapid Water Loss can Extend the Lifetime of the Planetary Habitability (2015)
  • Author(s): Kodama, T., Genda, H., Abe, Y., and Zahnle, K.
  • Journal Title: The Astrophysical Journal Volume: 812 Issue: 2 Pages: 165-165
  • DOI: 10.1088/0004-637x/812/2/165
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Resolution Dependence of Disruptive Collisions between Planetesimals in the Gravity Regime (2015)
  • Author(s): Genda, H., Fujita, T., Kobayashi, H., Tanaka, H., and Abe, Y.
  • Journal Title: Icarus Volume: 262 Pages: 58-66
  • DOI: 10.1016/j.icarus.2015.08.029
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Warm Debris Disks Produced by Giant Impact During Terrestrial Planet Formation (2015)
  • Author(s): Genda, H., Kobayashi, H., and Kokubo, E.
  • Journal Title: The Astrophysical Journal Volume: 810 Issue: 2 Pages: 136-136
  • DOI: 10.1088/0004-637x/810/2/136
  • Peer Reviewed / Open Access
• [Journal Article] SPH法による衝突数値計算 (2015)
  • Author(s): 玄田英典
  • Journal Title: 遊星人 Volume: 24 Pages: 191-200
  • Peer Reviewed
• [Presentation] 巨大天体衝突 (2017)
  • Author(s): 玄田英典
  • Organizer: 第４９回天体力学N体力学研究会
  • Place of Presentation: 東京工業大学（東京都）
  • Year and Date: 2017-03-22
  • Invited
• [Presentation] スーパーアースの平均密度多様性の起源：天体衝突侵食の影響 (2017)
  • Author(s): 玄田英典
  • Organizer: 第５回宇宙における生命ワークショップ
  • Place of Presentation: 一橋大学（東京都）
  • Year and Date: 2017-03-07
• [Presentation] Planet Formation (2016)
  • Author(s): Genda, H.
  • Organizer: UK-Japan Frontiers of Science Symposium
  • Place of Presentation: The Royal Society at Chicheley Hall, Buckinghamshire, U.K.
  • Year and Date: 2016-11-08
  • Int'l Joint Research / Invited
• [Presentation] Giant Impacts and Satellite Formation (2016)
  • Author(s): Genda, H.
  • Organizer: Japan-Germany Planet & Disk Workshop
  • Place of Presentation: Beach Hotel Sunshine Ishigakijima, Ishigaki Island, Okinawa, Japan
  • Year and Date: 2016-09-30
  • Int'l Joint Research / Invited
• [Presentation] 冥王星の暗い赤道領域はカロン形成巨大衝突で作れるか？ (2016)
  • Author(s): 玄田英典、関根康人、鎌田俊一、舟津太郎
  • Organizer: 日本惑星科学会 2016年秋季講演会
  • Place of Presentation: ノートルダム清心女子大学（岡山県）
  • Year and Date: 2016-09-13
• [Presentation] 新たな衝突仮説に基づく火星衛星の起源と火星サイエンス (2016)
  • Author(s): 玄田英典
  • Organizer: 第49回 月・惑星シンポジウム
  • Place of Presentation: 宇宙科学研究所（神奈川県）
  • Year and Date: 2016-07-21
• [Presentation] The Formation of Elongated Dark Areas on Pluto by a Charon-Forming Giant Impact (2016)
  • Author(s): Genda, H., Sekine, Y. and Funatsu, T.
  • Organizer: Goldschmidt Conference 2016
  • Place of Presentation: Pacifico Yokohama, Kanagawa, Japan
  • Year and Date: 2016-06-29
  • Int'l Joint Research
• [Presentation] On the origin of Martian moons (2016)
  • Author(s): Genda, H., Hyodo, R., Charnoz, S. and Rosenblatt, P.
  • Organizer: Japan Geoscience Union Meeting 2016
  • Place of Presentation: Makuhari Messe International Conference Hall, Chiba, Japan
  • Year and Date: 2016-05-23
  • Int'l Joint Research
• [Presentation] 巨大衝突シナリオの検証可能性 (2016)
  • Author(s): 玄田英典
  • Organizer: 第14回CPS月惑星探査研究会
  • Place of Presentation: 北海道大学東京オフィス（東京都）
  • Year and Date: 2016-05-20
• [Presentation] 巨大天体衝突 (2016)
  • Author(s): 玄田英典
  • Organizer: 宇宙生命計算科学連携拠点 第２回ワークショップ
  • Place of Presentation: 筑波大学（茨城県）
  • Year and Date: 2016-04-27
  • Int'l Joint Research
• [Presentation] 火星形成論とMMX (2016)
  • Author(s): 玄田英典
  • Organizer: 第10回CPS月惑星探査研究会
  • Place of Presentation: 神戸大学（兵庫県）
  • Year and Date: 2016-03-28
• [Presentation] 惑星形成シミュレーションの量的・質的向上に向けて (2016)
  • Author(s): 玄田英典
  • Organizer: 日本天文学会 2016年春季年会
  • Place of Presentation: 首都大学東京（東京都）
  • Year and Date: 2016-03-15
  • Invited
• [Presentation] 生命を宿す惑星の成り立ちを考える (2016)
  • Author(s): 玄田英典
  • Organizer: 第20回自然科学研究機構シンポジウム
  • Place of Presentation: 学術総合センター（東京都）
  • Year and Date: 2016-03-13
  • Invited
• [Presentation] Scientific Aspects of MMX Mission (2016)
  • Author(s): Genda, H.
  • Organizer: Phobos, Deimos, and Mars Workshop
  • Place of Presentation: 東京工業大学（東京都）
  • Year and Date: 2016-01-13
  • Int'l Joint Research
• [Presentation] Giant impacts and early evolution of terrestrial planets (2016)
  • Author(s): Genda, H.
  • Organizer: The 4th ELSI International Symposium
  • Place of Presentation: 東京工業大学（東京都）
  • Year and Date: 2016-01-13
  • Int'l Joint Research
• [Presentation] 火星衛星の起源とサイエンス (2015)
  • Author(s): 玄田英典
  • Organizer: 第7回CPS月惑星探査研究会
  • Place of Presentation: 神戸大学（兵庫県）
  • Year and Date: 2015-11-17
• [Presentation] Giant Impacts and Terrestrial Planet Formation (2015)
  • Author(s): Genda, H.
  • Organizer: Workshop for The Earth's Mantle and Core
  • Place of Presentation: 道後プリンスホテル（愛媛県）
  • Year and Date: 2015-11-04
  • Int'l Joint Research
• [Presentation] 地球型惑星における大気と海洋の形成 (2015)
  • Author(s): 玄田英典
  • Organizer: 大気化学検討会2015
  • Place of Presentation: 東京工業大学（東京都）
  • Year and Date: 2015-10-20
  • Invited
• [Presentation] 火星衛星の起源について～現状整理と展望、サイエンスの展開～ (2015)
  • Author(s): 玄田英典、樋口有理可、Ramon Brasser、小南淳子、兵頭龍樹、末次竜、関根康人、木村淳、臼井寛裕、黒川宏之、中田亮一、井田茂、大槻圭史、中本泰史、火星衛星サンプルリターン計画科学検討チーム
  • Organizer: 日本惑星科学会 2015年秋季講演会
  • Place of Presentation: 東京工業大学（東京都）
  • Year and Date: 2015-10-14
• [Presentation] 地球形成と初期進化 (2015)
  • Author(s): 玄田英典
  • Organizer: 日本地球化学会年会
  • Place of Presentation: 横浜国立大学（神奈川県）
  • Year and Date: 2015-09-16
  • Invited
• [Presentation] 火星衛星の起源について：現状の理解とサイエンス (2015)
  • Author(s): 玄田英典、火星衛星サンプルリターン計画科学検討チーム
  • Organizer: 第6回CPS月惑星探査研究会
  • Place of Presentation: 神戸大学（兵庫県）
  • Year and Date: 2015-08-27
• [Presentation] Splashed Hadean Seawater Hypothesis (2015)
  • Author(s): Genda, H., Ueno, Y., Foriel, J., Usui, T., Ueta, S., Bao, H. and Sun, T.
  • Organizer: Goldschmidt Conference 2015
  • Place of Presentation: Prague Congress Center (Purague, Czech Republic)
  • Year and Date: 2015-08-20
  • Int'l Joint Research
• [Presentation] 冥王代海洋飛沫仮説の立案と検証法について (2015)
  • Author(s): 玄田英典、上野雄一郎、臼井寛裕、上田翔士、Foriel Julien、Bao Huiming、Tao Sun
  • Organizer: 日本地球惑星科学連合 2015年連合大会
  • Place of Presentation: 幕張メッセ 国際会議場（千葉県）
  • Year and Date: 2015-05-25
  • Invited