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

2009 Fiscal Year Final Research Report

• 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
• Keywords: 惑星形成・進化 / 衝突 / ダスト / 微惑星

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
  • 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
• [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] 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
  • 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
  • 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 Pages: L199-L202
  • Peer Reviewed
• [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
  • Year and Date: 20100000
• [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] 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] 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: 20080000
• [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] 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