Construction of a structure evolution model of small solar system bodies by numerical simulations of aggregate collisions

• Project/Area Number: 20740247
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Solid earth and planetary physics
• Research Institution: Hokkaido University
• Principal Investigator: WADA Koji Hokkaido University, 惑星探査研究センター, 上席研究員 (10396856)
• Project Period (FY): 2008 – 2009
• Project Status: Completed (Fiscal Year 2009)
• Budget Amount: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000); Fiscal Year 2009: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2008: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
• Keywords: 惑星形成・進化 / 衝突 / ダスト / 微惑星 / 惑星起源・進化 / 天文

Research Abstract

Small solar system bodies, such as comets and asteroids, are considered to be remnants of planetesimals formed through collisional growth of dust aggregates consisting of submicron grains in a protoplanetary disk. We carried out numerical simulations of collisions of dust aggregates to construct a structure evolution model of planetesimals and small solar system bodies. We reveal that very low density planetesimals are inevitably formed as a result of collisional growth of dust aggregates and such process leads small solar system bodies to have low density structures we observe at present.

Research Products

• [Journal Article] Collisional Growth Possibility of Dust Aggregates: A Bouncing Problem (2010)
  • Author(s): Wada, K., Tanaka, H., Suyama, T., Kimura, H., Yamamoto, T.
  • Journal Title: Proc. Lunar Planet. Sci. Conf. 41th #1717
• [Journal Article] Collisional process on comet 9/P Tempel 1: Mass loss of its dust and ices by impacts of asteroidal objects and its collisional history (2010)
  • Author(s): Yamamoto, S., Wada, K., Kobayashi, H., Kimura, H., Ishiguro, M., Matsui, T.
  • Journal Title: Earth Planet. Space 62 Pages: 5-11
  • NAID: 10029015168
  • Peer Reviewed
• [Journal Article] Collisional process on Comet 9/P Tempel 1 : mass loss of its dust and ice by impacts of asteroidal objects and its collisional history (2010)
  • Author(s): Yamamoto, S., Wada, K., Kobayashi, H., Kimura, H., Ishiguro, M., Matsui, T.
  • Journal Title: Earth, Planets and Space 62 Pages: 5-11
  • NAID: 10029015168
  • Peer Reviewed
• [Journal Article] つぶらな衝突 (2009)
  • Author(s): 和田浩二
  • Journal Title: 日本惑星科学会誌(遊・星・人) Vol.18,No.4 Pages: 216-225
  • Peer Reviewed
• [Journal Article] Collisional Growth Conditions for Dust Aggregates (2009)
  • Author(s): Wada, K., Tanaka, H., Suyama, T., Kimura, H., Yamamoto, T.
  • Journal Title: Astrophys. J. 702 Pages: 1490-1501
  • Peer Reviewed
• [Journal Article] Numerical Simulation of Dust Aggregate Collisions: Growth and Disruption of Dust Aggregates (2009)
  • Author(s): Wada, K., Tanaka, H., Suyama, T., Kimura, H., Yamamoto, T.
  • Journal Title: Proceedings of the International Conference on Exoplanets and Disks Pages: 103-106
• [Journal Article] 惑星系円盤ダストの物理過程 (2009)
  • Author(s): 山本哲生, 和田浩二, 小林浩, 木村宏, 田中今日子, 田中秀和
  • Journal Title: 天文月報 Vol.102,No.2 Pages: 118-126
  • NAID: 10027890779
• [Journal Article] Growth and disruption of dust aggregates by Collisions, Proceedings of Cosmic Dust (2009)
  • Author(s): Wada, K., Tanaka, H., Suyama, T., Kimura, H., Yamamoto, T.
  • Journal Title: Near & Far 2008 in Astoronomical Society of the Pacific (in press)
• [Journal Article] つぶらな衝突 (2009)
  • Author(s): 和田浩二
  • Journal Title: 日本惑星科学会誌(遊・星・人) 18 Pages: 216-225
  • Peer Reviewed
• [Journal Article] Collisional Growth Conditions for Dust Aggregates (2009)
  • Author(s): Wada, K., Tanaka, H., Suyama, T., Kimura, H,, Yamamoto, T.
  • Journal Title: Astrophysical Journal 702 Pages: 1490-1501
  • Peer Reviewed
• [Journal Article] 合体成長過程におけるダスト圧縮過程の数値計算とその定式化 (2008)
  • Author(s): 陶山徹, 和田浩二, 田中秀和
  • Journal Title: 日本惑星科学会誌(遊・星・人) Vol.17,No.3 Pages: 177-184
  • NAID: 110006951744
  • Peer Reviewed
• [Journal Article] Numerical simulation of density evolution of dust aggregates in protoplanetary disks. (2008)
  • Author(s): Suyama, T., Wada, K., Tanaka, H.
  • Journal Title: I. Head-on collisions, Astrophys. J. 684 Pages: 1310-1322
  • Peer Reviewed
• [Journal Article] Numerical Simulation of Dust Aggregate Collisions. (2008)
  • Author(s): Wada, K., Tanaka, H., Suyama, T., Kimura, H., Yamamoto, T.
  • Journal Title: II. Compression and Disruption of Three-Dimensional Aggregates in Head-on Collisions. Astrophys. J. 667 Pages: 1296-1308
  • NAID: 120000947292
  • Peer Reviewed
• [Journal Article] Comet 9P/Tempel 1: Interpretation with the Deep Impact Results (2008)
  • Author(s): Yamamoto, S., Kimura, H., Zubko, E., Kobayashi, H., Wada, K., Ishiguro, M., Matsui, T.
  • Journal Title: Astrophys. J. 673
  • Peer Reviewed
• [Journal Article] Numerical Simulation of Dust Aggregate Collisions. II. Compression and Disruption of Three-Dimensional Aggregates in Head-on Collisions (2008)
  • Author(s): Wada, K., Tanaka, H., Suyama, T., Kimura, H., Yamamoto, T.
  • Journal Title: Astrophysical Journal 667 Pages: 1296-1308
  • Peer Reviewed
• [Journal Article] Numerical simulation of density evolution of dust aggregates in protoplanetary disks. I. Head-on collisions (2008)
  • Author(s): Suyama, T., Wada, K., and Tana ka, H.
  • Journal Title: Astrophysical Journal 684 Pages: 1310-1322
  • Peer Reviewed
• [Journal Article] Comet 9P/Tempel 1 : Interpretation with the Deep Impact Results (2008)
  • Author(s): Yamamoto, S., Kimura, H., Zubko, E., Kobayashi, H., Wada, K. Ishiguro, M., Matsui, T.
  • Journal Title: Astrophysical Journal 673
  • Peer Reviewed
• [Presentation] Bouncing Conditions and Collisional Growth Possibility of Dust Aggregates (2010)
  • Author(s): 和田浩二, 田中秀和, 陶山徹, 木村宏, 山本哲生
  • Organizer: 第6回太陽系外惑星大研究会
  • Place of Presentation: 国立天文台
  • Year and Date: 2010-01-18
• [Presentation] Collisional Growth Possibility of Dust Aggregates: A Bouncing Problem, Lunar Planet (2010)
  • Author(s): Wada, K., Tanaka, H., Suyama, T., Kimura, H., Yamamoto, T.
  • Organizer: Sci. Conf. 41th
  • Place of Presentation: Woodlands, TX, USA
• [Presentation] ダストアグリゲイトの跳ね返り条件 (2009)
  • Author(s): 和田浩二, 田中秀和, 陶山徹, 木村宏, 山本哲生
  • Organizer: 「天体の衝突物理の解明」研究会(V)
  • Place of Presentation: 北海道大学低温科学研究所
  • Year and Date: 2009-11-13
• [Presentation] ダストアグリゲイト衝突シミュレーション (2009)
  • Author(s): 和田浩二
  • Organizer: 第25回Grain Formation Workshop/平成21年度銀河のダスト研究会
  • Place of Presentation: 大阪産業大学梅田サテライト教室
  • Year and Date: 2009-10-09
• [Presentation] つぶらな衝突 (2009)
  • Author(s): 和田浩二
  • Organizer: 日本惑星科学会秋季年会
  • Place of Presentation: 東京大学
  • Year and Date: 2009-09-29
• [Presentation] ダストアグリゲイトの衝突による付着・反発・破壊 (2009)
  • Author(s): 和田浩二, 田中秀和, 陶山徹, 木村宏, 山本哲生
  • Organizer: 日本地球惑星科学連合大会
  • Place of Presentation: 幕張
  • Year and Date: 2009-05-19
• [Presentation] Numerical Simulation of Dust Aggregate Collisions: Growth and Disruption of Dust Aggregates (2009)
  • Author(s): Wada, K., Tanaka, H., Suyama, T., Kimura, H., Yamamoto, T.
  • Organizer: Exoplanets and Disks: Their formation and Diversity, The 2nd Subaru International Conference
  • Place of Presentation: Keauhou, Hawaii, USA
  • Year and Date: 2009-03-11
• [Presentation] Numerical Simulation of Dust Aggregate Collisions : Growth and Disruption of Dust Aggregates (2009)
  • Author(s): Wada, K., Tanaka, H., Suyama, T., Kimura, H., Yamamoto, T.
  • Organizer: Exoplanets and Disks : Their Formation and Diver sity, The 2nd Subaru International Conference
  • Place of Presentation: Keauhou, Hawaii(USA)
  • Year and Date: 2009-03-10
• [Presentation] 衝突によるダストの破壊と成長 (2008)
  • Author(s): 和田浩二, 田中秀和, 陶山徹, 木村宏, 山本哲生
  • Organizer: 日本惑星科学会秋季年会
  • Place of Presentation: 九州大学
  • Year and Date: 2008-11-03
• [Presentation] ダストアグリゲイトの衝突シミュレーションによる破壊過程と成長効率 (2008)
  • Author(s): 和田浩二, 田中秀和, 陶山徹, 木村宏, 山本哲生
  • Organizer: 「天体の衝突物理の解明」研究会(IV)
  • Place of Presentation: 北海道大学低温科学研究所
  • Year and Date: 2008-09-29
• [Presentation] Growth and disruption of dust aggregates by collisions (2008)
  • Author(s): Wada, K., Tanaka, H., Suyama, T., Kimura, H., Yamamoto, T.
  • Organizer: Cosmic Dust-Near & Far
  • Place of Presentation: Heidelberg, Germany
  • Year and Date: 2008-09-11
• [Presentation] Numerical Simulation of Dust Aggregate Collisions: Compression and Disruption of 3D Aggregates (2008)
  • Author(s): Wada, K., Tanaka, H., Suyama, T., Kimura, H., Yamamoto, T.
  • Organizer: Asia Oceania Geosciences Society 5th Annual Meeing
  • Place of Presentation: Busan, Korea
  • Year and Date: 2008-06-18
• [Presentation] ダストアグリゲイトの衝突による付着と破壊 (2008)
  • Author(s): 和田浩二, 田中秀和, 陶山徹, 木村宏, 山本哲生
  • Organizer: 日本地球惑星科学連合大会
  • Place of Presentation: 幕張
  • Year and Date: 2008-05-30
• [Presentation] Growth and disruption of dust aggregates by collisions (2008)
  • Author(s): Wada, K., Tanaka, H., Suyama, T., Kimura, H., Yamamoto, T.
  • Organizer: Cosmic Dust - Near & Far
  • Place of Presentation: Heidelberg, Germany