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1999 Fiscal Year Final Research Report Summary

Study of Planetesimals - Origin of Edgeworth - Kuiper belt objects and small bodies in the Solar system

Research Project

Project/Area Number 09640528
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Space and upper atmospheric physics
Research InstitutionNagoya University (1999)
Hokkaido University (1997-1998)

Principal Investigator

YAMAMOTO Tetsuo  Nagoya University, Graduate School of Science, Professor, 大学院・理学研究科, 教授 (10126196)

Project Period (FY) 1997 – 1999
Keywordsplantesimal / Edgeworth-Kuiper belt object / thermal history / mechanical properties / powder / nucleation / comet / presolar grains
Research Abstract

The goal of the present study is to clarify whether Edgeworth-Kuiper belt objects (EKOs) and comets are remnant planetesimals. Focus is placed on revealing (1) the structure of the Edgeworth-Kuiper belt and (2) physical properties of EKOs and small bodies in the solar system, in particular mechanical strength and properties of volatile solids including amorphous ice.
(1) Evaluation is made of the contribution of the Edgeworth-Kuiper belt to supply of interplanetary dust. It is found that substantial amount of dust is produced in the Edgeworth-Kuiper belt. Detectability of the Dust cloud is discussed for revealing the global structure of the Edgeworth-Kuiper belt.
(2) An expression of the thermal conductivity of granular materials is derived. The result is applied to the calculations of thermal histories of icy planetenesimals including the evolution of their mechanical strength due to sintering. Release mechanisms of volatile molecules from amorphous ice are also revealed.
Progress in the study leads to the study of the formation of dust grains that form solar system bodies. Physical conditions for formation of presolar grains found in the carbonaceous chondrites have been revealed.

  • Research Products

    (16 results)

All Other

All Publications (16 results)

  • [Publications] J. M. Greenberg: "On the Crystalline Silicate Component of Comet Dust"Proc. IAU Colloquium (Physics, Chemistry and Dynamics of Interplanetory Dust). 150. 487-506 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] S. Sirono: "Thermal Conductivity of a Granular Material Relevant to the Thermal Evolution of Cometary Nuclei"Planetary and Space Science. 45. 827-834 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 佐々木晶: "宇宙塵の起源"遊・星・人. 6・4. 291-301 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T. Chigai: "Formation Conditions of Presolar Tic Core-Graphite Mantle Spherules in the Murchison Meteorite"Astrophysical Journal. 510. 999-1010 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] S. Sirono: "Internal Evolution of an Icy Planetesimal ; The Evolution of Temperature, Chemical Composition and Mechanical Properties"Advances in Space Research. 23・7. 1299-1308 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T. Yamamoto: "Long-term Evolution of the Temperature, Chemical Composition, and Mechanical Properties of Cometary Nuclei"Conference Series of the Astronomical Society of the Pacific. (in press).

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T. Yamamoto: "Cosmic Dust Connection"Kluwer Academic Publishers. 545 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] S. Sirono: "Formation and Evolution of Solids in Space"Kluwer Academic Publishers. 598 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Greenberg, J.M., Li, A., Yamamoto, T., and Kozasa. T.: "On the Crystalline Silicate Component of Comet Dust, Physics, Chemistry, and Dynamics of Interplanetary Dust"Proc. IAU Colloquium No. 150 eds. B.A.S. Gustafson, and M.S. Hanner, ASP Conference Series, Kluwer Academic Publishers. 487-506 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Sirono, S. and Yamamoto, T.: "Thermal Conductivity of a Granular Material Relevent to the Thermal Evolution of Cometary Nuclei"Planetary and Space Science. 45. 827-834 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Sasaki, S., Yamamoto, T., Yoshikawa, M.., and Hanada, T.: "Origin of Cosmic Dust"Yu-Sei-Jin (Japanese Society of Planetary Sciences). vol.6, No.4. 291-301 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Chigai, T., and Yamamoto, T., and Kozasa, T.: "Formation Conditions of Presolar TiC Core-Graphic Mantle Spherules in the Murchison Meteorite"510. 999-1010 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Yamamoto, T. and Sirono, S.: "Long-term Evolution of the Temperature, Chemical Composition, and Mechanical Properties of Cometary Nuclei"Conference Series of the Astronomical Society of the Pacific. (in press). (2000)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Sirono, S. and Yamamoto, T.: "Internal Evolution of an Icy Planetesimal : The Evolution of Temperature, Chemical Composition and Mechanical Properties"Advances in Space Research. vol. 23 no 7. 1299-1308 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T. Yamamoto: "Origin and Evolution of Cometary Ice, Cosmic Dust Connection (Lecture note for the International School of Space Chemistry at Erice), ed. J.M. Greenberg"Kluwer Acdemic Publishers. 413-441 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Sirono, S. and Yamamoto, T.: "Release Mechanisms of Volatile Molecules in Amorphous H2O ice, Formation and Evolution of Solids in Space, eds. 〜J.M. Greenberg and A. Li"Kluwer Academic Publishers. 527-534 (1999)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 2001-10-23  

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