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Theoretical Studies on Evolution of Dust Size and Structure in Protoplanetary Disks

Research Project

Project/Area Number 18540227
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Astronomy
Research InstitutionHokkaido University

Principal Investigator

TANAKA Hidekazu  Hokkaido University, Institute of Low Temperature Science, Associate Professor (00282814)

Co-Investigator(Kenkyū-buntansha) WADA Koji  Hokkaido University, Institute of Low Temperature Science, Postdoctoral Fellow (10396856)
Project Period (FY) 2006 – 2007
Project Status Completed (Fiscal Year 2007)
Budget Amount *help
¥3,870,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥270,000)
Fiscal Year 2007: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2006: ¥2,700,000 (Direct Cost: ¥2,700,000)
Keywordsplanet formation / protoplanetary disk / dust grain / bulk density / planetesimal / フラクタル構造 / 惑星多形成 / BCCA / 衝突破壊
Research Abstract

The bulk density of dust aggregates is an important factor in collisional growth of dust in protoplanetary disks. The density of aggregates changes the coupling with the disk gas, which governs the motion of aggregates in disks. Collisional outcomes also depend on the aggregate density. We perform three-dimensional N-body simulations of sequential collisions of aggregates composed of a number of sub-micron-sized icy particles in order to investigate the density evolution of dust aggregates growing in protoplanetary disks. In the present simulation of sequential collisions, as the initial aggregates at each collision, we use the resultant aggregate obtained at the previous collision. By repeating N-body calculations of aggregate collisions, we examined the density evolution of aggregate collisions. At an early stage of dust growth, aggregates stick to each other without restructuring, and the density of these aggregates decreases. At a later stage, in which the impact energy exceeds a critical energy, aggregates are gradually compressed. The compressed aggregates have a fractal dimension of 2.5. Because of this small fractal dimension, their density remains very low even at this compression stage. We also derive an equation describing the density evolution of growing aggregates. Applying this equation to dust growth in protoplanetary disks, we find that dust aggregates have an extremely low density (< 0.1 kg m-3). In the simulation of the present study, we consider only head-on collisions. The effect of oblique collisions would further reduce the aggregate density.

Report

(3 results)
  • 2007 Annual Research Report   Final Research Report Summary
  • 2006 Annual Research Report
  • Research Products

    (39 results)

All 2008 2007 2006 Other

All Journal Article (21 results) (of which Peer Reviewed: 10 results) Presentation (18 results)

  • [Journal Article] Numerical Simulation of Dust Aggregate Collisions: II. Compression and Disruption of Three-Dimensional Aggregates in Head-on Collisions2008

    • Author(s)
      Koji Wada , et. al.
    • Journal Title

      Astrophysical J 677

      Pages: 1296-1308

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
    • Peer Reviewed
  • [Journal Article] COMET 9P/TEMPEL 1: INTERPRETATION WITH THE DEEP IMPACT RESULTS2008

    • Author(s)
      Satoru Yamamoto , et. al.
    • Journal Title

      Astrophysical J 673

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
    • Peer Reviewed
  • [Journal Article] Numerical Simulation of Dust Aggregate Collisions: II. Compression and Disruption of Three-Dimensional Aggregates in Head-on Collisions2008

    • Author(s)
      Koji Wada, Hidekazu Tanaka, Tom Suyama, Hiroshi Kimura, and Tetsuo Yamamoto
    • Journal Title

      Astrophysical J. 677

      Pages: 1296-1308

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Journal Article] COMET 9PITEMPEL 1: INTERPRETATION WITH THE DEEP IMPACT RESULTS2008

    • Author(s)
      Satoru Yamamoto, Hiroshi Kimura, Evgenij Zubko, Hiroshi Kobayashi, Koji Wada, Masateru Ishiguro, and Takafumi Matsui
    • Journal Title

      Astrophysical J. 673

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Journal Article] Numerical Simulation of Dust Aggregate Collisions. II. Compression and Disruption of Three-Dimensional Aggregates in Head-on Collisions2008

    • Author(s)
      Wada, K.
    • Journal Title

      Astrophysical Journal 677

      Pages: 1296-1308

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Numerical Simulation of Dust Aggregate Collisions: I. Compression and Disruption of 2D Aggregates2007

    • Author(s)
      Koji Wada , et. al.
    • Journal Title

      Astrophysical J 661

      Pages: 320-333

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
    • Peer Reviewed
  • [Journal Article] Numerical Simulation of Dust Aggregate Collisions: I. Compression and Disruption of 2D Aggregates2007

    • Author(s)
      Koji Wada, Hidekazu Tanaka, Tom Suyama, Hiroshi Kimura, and Tetsuo Yamamoto
    • Journal Title

      Astrophysical J. 661

      Pages: 320-333

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Journal Article] Numerical Simulation of Dust Aggregate Collisions. I. Compression and Disruption of Two-Dimensional Aggregates2007

    • Author(s)
      Wada, K.
    • Journal Title

      Astrophysical Journal 661

      Pages: 320-333

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Density Evolution of Dust Aggregates Growing in Protoplanetary Disks2007

    • Author(s)
      Suyama, T.
    • Journal Title

      2007 Proceedinggs of Lunar and Planetary Science Conference 39

      Pages: 1473-1474

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Orbital Evolution and Accretion of Protoplanets Tidally Interacting with a Gas Disk: II. Solid surface density evolution with type-I migration2006

    • Author(s)
      Junko K. Daisaka , et. al.
    • Journal Title

      Icarus 185

      Pages: 492-507

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
    • Peer Reviewed
  • [Journal Article] Transient crater growth in granular targets: An experimental study of lowvelocity impacts into glass sphere targets2006

    • Author(s)
      Satoru Yamamoto , et. al.
    • Journal Title

      Icarus 183

      Pages: 215-224

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
    • Peer Reviewed
  • [Journal Article] Mathematical and Physical Model of Celestial Body Impacts2006

    • Author(s)
      Koji Wada
    • Journal Title

      応用数理 16

      Pages: 19-31

    • NAID

      110006152530

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
    • Peer Reviewed
  • [Journal Article] Orbital Evolution and Accretion of Protoplanets Tidally Interacting with a Gas Disk: II. Solid surface density evolution with type-I migration2006

    • Author(s)
      Junko K. Daisaka, Hidekazu Tanaka, and Shigeru Ida
    • Journal Title

      Icarus 185

      Pages: 492-507

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Journal Article] Transient crater growth in granular targets: An experimental study of low velocity impacts into glass sphere targets2006

    • Author(s)
      Satoru Yamamoto, Koji Wada, Norihisa Okabe, Takafumi Matsui
    • Journal Title

      Icarus 183

      Pages: 215-224

    • NAID

      120000960924

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Journal Article] Mathematical and Physical Model of Celestial Body Impacts2006

    • Author(s)
      Koji Wada
    • Journal Title

      Bulletin of the Japan Society for Industrial and Applied Mathematics 16

      Pages: 19-31

    • NAID

      110006152530

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Journal Article] Orbital Evolution and Accretion of Protoplanets Tidally Interacting with a Gas Disk : II. Solid surface density evolution with type-I migration2006

    • Author(s)
      Daisaka, J.
    • Journal Title

      Icarus 185

      Pages: 492-507

    • Related Report
      2006 Annual Research Report
  • [Journal Article] 天体現象の数理モデル2006

    • Author(s)
      和田浩二
    • Journal Title

      応用数理 16-4

      Pages: 19-21

    • Related Report
      2006 Annual Research Report
  • [Journal Article] The formation of fluidized ejecta on Mars by granular flows2006

    • Author(s)
      Wada, K.
    • Journal Title

      Meteorit. Planet. Sci. 41

      Pages: 1551-1569

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Transient crater growth in granular target : An experimental study of low velocity impact into glass sphere targets2006

    • Author(s)
      Yamamoto, S.
    • Journal Title

      Icarus 183

      Pages: 215-224

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Numerical Simulahon on Density Evolution of Dust Aggregates in Protoplanetary Disks: I. Head-on Collisions

    • Author(s)
      Toru Suyama, et. al.
    • Journal Title

      Astrophysical J. (In press)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
    • Peer Reviewed
  • [Journal Article] Numerical Simulation on Density Evolution of Dust Aggregates in Protoplanetary Disks: I. Head-on Collisions

    • Author(s)
      Toru Suyama, Koji Wada, and Hidekazu Tanaka
    • Journal Title

      Astrophysical J. (In press)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Density Evolution of Dust Aggregates Growing in Protoplanetary Disks2008

    • Author(s)
      Toru Suyama
    • Organizer
      The 39th Lunar and Planetary Science Conference
    • Place of Presentation
      Marina Plaza Ballroom Leage City Texas USA
    • Year and Date
      2008-03-12
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Numerical Simulation of Dust Aggregate Collisions: Compression and Disruption of BCCA Clusters2008

    • Author(s)
      K. Wada
    • Organizer
      The 39th Lunar and Planetary Science Conference
    • Place of Presentation
      Fitness Center Leage City Texas USA
    • Year and Date
      2008-03-11
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Numerical Simulation of Dust Aggregate Collisions:Compression and Disruption of BCCA Clusters2008

    • Author(s)
      K. Wada, H. Tanaka, T. Suyama, H. Kimura, and T. Yamamoto
    • Organizer
      The 39th Lunar and Planetary Science Conference
    • Place of Presentation
      Fitness Center League City, Texas, USA
    • Year and Date
      2008-03-11
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Density Evolution of Dust Aggregates Growing in Protoplanetary Disks2008

    • Author(s)
      Toro Suyama, Koji Wada, Hidekazu Tanaka
    • Organizer
      The 39th Lunar and Planetary Science Conference
    • Place of Presentation
      Marina Plaza Ballroom League City, Texas, USA
    • Year and Date
      2008-03-11
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Planetesimal Formation through Direct Dust Growth2007

    • Author(s)
      H. Tanaka
    • Organizer
      American Astronomical Society, 39th DPS meeting
    • Place of Presentation
      The University of Florida Orlando, FL, USA
    • Year and Date
      2007-10-10
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Numerical Simulation and Formulation of Dust Compression Process2007

    • Author(s)
      T. Suyama
    • Organizer
      American Astronomical Society, 39th DPS meeting
    • Place of Presentation
      The University of Florida Orlando, FL, USA
    • Year and Date
      2007-10-10
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Planetesimal Formation through Direct Dust Growth2007

    • Author(s)
      H. Tanaka, T. Suyama, K. Wada, and H. Kobayashi
    • Organizer
      American Astronomical Society, 39th DPS meeting
    • Place of Presentation
      TheUniversity of Central Florida, Orlando FL, USA
    • Year and Date
      2007-10-10
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Numerical Simulation and Formulation of Dust Compression Process2007

    • Author(s)
      T. Suyama, K. Wada, and H.Tanaka
    • Organizer
      American Astronomical Society, 39th DPS meeting
    • Place of Presentation
      The University of Central Florida, Orlando, FL, USA
    • Year and Date
      2007-10-10
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Planetesimal Formation through Direct Dust Growth2007

    • Author(s)
      H. Tanaka
    • Organizer
      American Astronomical Society, 39th DPS meeting
    • Place of Presentation
      Rosen Centere, Orlando, USA
    • Year and Date
      2007-10-10
    • Related Report
      2007 Annual Research Report
  • [Presentation] Size and structure evolution of dust aggregates in nebula disks2006

    • Author(s)
      Hidekazu Tanaka
    • Organizer
      The 3rd Workshop on Development of Extra-solar Planetary Science
    • Place of Presentation
      Koshiba Memorial Hall Tokyo Univ., Japan
    • Year and Date
      2006-12-13
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Numerical simulation of dust aggregate collisions2006

    • Author(s)
      Wada, K
    • Organizer
      The 3rd Workshop on Development of Extra-solar Planetary Science
    • Place of Presentation
      Koshiba Memorial Hall Tokyo Univ., Japan
    • Year and Date
      2006-12-13
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Size and structure evolution of dust aggregates in nebula disks2006

    • Author(s)
      Hidekazu Tanaka
    • Organizer
      The 3rd Workshop on Development of Extra-solar Planetary Science
    • Place of Presentation
      Koshiba Memorial Hall,Tokyo Univ., Japan
    • Year and Date
      2006-12-13
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Size and structure evolution of dust grains in nebula disks2006

    • Author(s)
      H. Tanaka
    • Organizer
      Workshop-From Dust to Planetesimals
    • Place of Presentation
      Ringberg Castle, Germany
    • Year and Date
      2006-09-13
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Size and structure evolution of dust grains in nebula disks2006

    • Author(s)
      H. Tanaka, T. Suyama, and K. Wada
    • Organizer
      Workshop -From Dust to Planetesimals
    • Place of Presentation
      Ringberg Castle, Germany
    • Year and Date
      2006-09-13
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Compression at collisions of fluffy dust aggregates2006

    • Author(s)
      T. Suyama
    • Organizer
      Workshop-From Dust to Planetesimals
    • Place of Presentation
      Ringberg Castle, Germany
    • Year and Date
      2006-09-11
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Compression at collisions of fluffy dust aggregates2006

    • Author(s)
      T. Suyama, K. Wada, and H.Tanaka
    • Organizer
      Workshop -From Dust to Planetesimals
    • Place of Presentation
      Ringberg Castle, Germany
    • Year and Date
      2006-09-11
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] A3-D numerical simulation of dust aggregate collisions2006

    • Author(s)
      Wada, K
    • Organizer
      Asia Oceania Geosciences Society 3rd Annual Meeing
    • Place of Presentation
      Suntec Singapore International Convention & Exhibition Centre
    • Year and Date
      2006-07-11
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] A 3-D numerical simulation of dust aggregate collisions2006

    • Author(s)
      Wada, K., Tanaka, H., Suyama, T., Kimura, H., and Yamamoto, T.
    • Organizer
      Asia Oceania Geosciences Society 3rd Annual Meeing
    • Place of Presentation
      SuntecSingapore InternationalConvention & Exhibition Centre,Singapore
    • Year and Date
      2006-07-11
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary

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Published: 2006-04-01   Modified: 2016-04-21  

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