Construction of a growth model of dust to planetesimals by numerical N-body simulation

2011 Fiscal Year Final Research Report

• Project/Area Number: 22740299
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Solid earth and planetary physics
• Research Institution: Chiba Institute of Technology
• Principal Investigator: WADA Koji 千葉工業大学, 惑星探査研究センター, 上席研究員 (10396856)
• Project Period (FY): 2010 – 2011
• Keywords: 惑星形成・進化 / 衝突 / ダスト / 微惑星

Research Abstract

I carried out numerical simulations of collisions between dust aggregates consisting of submicron grains to construct a growth model of dust to planetesimals in protoplanetary disks. In particular, I focus on the effects of bouncing process, the mass ratio of colliding aggregates, and the monomer size distributions in aggregates. As a result, I found that icy dust aggregates are able to grow in protoplanetary disks, but silicate dust aggregates are still difficult to grow. We need study more in wider ranges of parameters and the effects of other factors.

Research Products

• [Journal Article] Geometrical cross sections of dust aggregates and a compression model at aggregate collisions (2012)
  • Author(s): Suyama, T., Wada, K., Tanaka, H., and Okuzumi, S
  • Journal Title: Astrophys. J. Volume: (In press)
  • Peer Reviewed
• [Journal Article] Rapid coagulation of porous dust aggregates outside the snow line : A pathway to successful icy planetesimal formation (2012)
  • Author(s): Okuzumi, S., Tanaka, H., Kobayashi, H., and Wada, K
  • Journal Title: Astrophys. J. Volume: (In press)
  • Peer Reviewed
• [Journal Article] Growth of cosmic dust aggregates and reexamination of particle interaction models (2012)
  • Author(s): Tanaka, H., Wada, K., Suyama, T., and Okuzumi, S
  • Journal Title: Prog. Theor. Phys. Suppl. Volume: (In press)
  • Peer Reviewed
• [Journal Article] Numerical simulations of collisions of dust aggregates with size distributions (2011)
  • Author(s): Wada, K., Tanaka, H., Suyama, T., Kimura, H., and Yamamoto, T
  • Journal Title: 第29回Grain Formation Workshop/平成23年度銀河のダスト研究会集録 Volume: (印刷中)
• [Journal Article] The Rebound Condition of Dust Aggregates Revealed by Numerical Simulation on their Collisions (2011)
  • Author(s): Wada, K., Tanaka, H., Suyama, T., Kimura, H., and Yamamoto, T
  • Journal Title: Astrophys. J Volume: 737 Pages: 36(12)
  • Peer Reviewed
• [Journal Article] Growth Effciency of Dust Aggregates Through Collisions with a Great Difference in Their Sizes Proc (2011)
  • Author(s): Wada, K., Tanaka, H., Suyama, T., Kimura, H., and Yamamoto, T.
  • Journal Title: Lunar Planet 42nd Volume: #1730
• [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., and Matsui, T
  • Journal Title: Earth Planet Volume: Space 62 Pages: 5-11
  • Peer Reviewed
• [Journal Article] Collisional Growth Possibility of Dust Aggregates : A Bouncing Problem (2010)
  • Author(s): Wada, K., Tanaka, H., Suyama, T., Kimura, H., and Yamamoto, T
  • Journal Title: Lunar Planet. Sci. Conf. 41st Volume: #1717
• [Presentation] Numerical simulation of collisions of dust aggregates with monomer size distributions (2012)
  • Author(s): 和田浩二, 田中秀和, 陶山徹, 木村宏, 山本哲生
  • Organizer: 第8回太陽系外惑星大研究会
  • Place of Presentation: 熱海
  • Year and Date: 2012-04-19
• [Presentation] Numerical Simulation of Collisions of Dust Aggregates Composed of Particles with Size Distributions (2012)
  • Author(s): Wada, K., Tanaka, H., Suyama, T., Kimura, H., and Yamamoto, T
  • Organizer: Dust and Grains in Low Gravity and Space Environment, ESA/ESTEC
  • Place of Presentation: Noordwijk, The Netherlands
  • Year and Date: 2012-04-04
• [Presentation] サイズ分布のある粒子からなるダストアグリゲイトの衝突シミュレーション (2011)
  • Author(s): 和田浩二, 田中秀和, 陶山徹, 木村宏, 山本哲生
  • Organizer: 第29回Grain Formation Workshop/平成23年度銀河のダスト研究会
  • Place of Presentation: CPS,神戸
  • Year and Date: 2011-11-10
• [Presentation] Numerical Simulation of Dust Aggregate Collisions : Current Understandings and Future Perspectives (2011)
  • Author(s): Wada, K., Tanaka, H., Suyama, T., Kimura, H., and Yamamoto, T
  • Organizer: Asia Oceania Geosciences Society 8th Annual Meeing
  • Place of Presentation: Taipei International Convention Center, Taipei
  • Year and Date: 2011-08-09
• [Presentation] Growth Effciency of Dust Aggregates Through Collisions with a Great Difference in Their Sizes (2011)
  • Author(s): Wada, K., Tanaka, H., Suyama, T., Kimura, H., and Yamamoto, T
  • Organizer: Lunar Planet. Sci. Conf. 42th
  • Place of Presentation: Woodlands, TX, USA
  • Year and Date: 2011-03-08
• [Presentation] To Bounce, or Not to Bounce : That is the Question of Dust Aggregates, Recent Progress in Physics of Dissipative Particles (2010)
  • Author(s): Wada, K., Tanaka, H., Suyama, T., Kimura, H., and Yamamoto, T
  • Organizer: From fine powders to macroscopic behaviors of granular particles
  • Place of Presentation: Yukawa Institute for Theoretical Physics(YITP), Kyoto University
  • Year and Date: 2010-11-25
• [Presentation] ダストアグリゲイト同士のDEM衝突シミュレーション (2010)
  • Author(s): 和田浩二, 田中秀和, 陶山徹, 木村宏, 山本哲生
  • Organizer: 「粉体物理を惑星科学の接点」ワークショップ,惑星科学研究センターセミナー
  • Place of Presentation: 神戸大学
  • Year and Date: 2010-11-23
• [Presentation] サイズ比のついたダストアグリゲイトの衝突 (2010)
  • 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(VI)
  • Place of Presentation: 北海道大学低温科学研究所
  • Year and Date: 2010-11-05
• [Presentation] ダストアグリゲイトの衝突シミュレーション:サイズ比の効果 (2010)
  • 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: 名古屋大学
  • Year and Date: 2010-10-06
• [Presentation] To Be Planetesimals, or Not to Be : That is the Question of Dust Aggregates?. Numerical Simulations of Dust Aggregate Collisions (2010)
  • Author(s): Wada, K., Tanaka, H., Suyama, T., Kimura, H., and Yamamoto, T
  • Organizer: Japanese-German Workshop "Dust IN Planetanary Systems"
  • Place of Presentation: Jena, Germany
  • Year and Date: 2010-09-29
• [Presentation] A dust aggregate model based on numerical simulations of aggregate collisions (2010)
  • Author(s): Wada, K., Tanaka, H., Suyama, T., Kimura, H., and Yamamoto, T
  • Organizer: 38th COSPAR Scientific Assembly
  • Place of Presentation: Bremen, Germany, solicited talk
  • Year and Date: 2010-07-23
• [Presentation] Numerical Simulations of Collisions between Different-sized Dust Aggregates (2010)
  • Author(s): Wada, K., Tanaka, H., Suyama, T., Kimura, H., and Yamamoto, T
  • Organizer: Asia Oceania Geosciences Society 7th Annual Meeing
  • Place of Presentation: Hyderabad, India
  • Year and Date: 2010-07-09
• [Presentation] To be or not to be : That is the question 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: 2010年度第1回CPSセミナー
  • Place of Presentation: 神戸大学
  • Year and Date: 2010-06-16