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Formation of Dust Grains in the Early Universe and its Effects on the Observations.

Research Project

Project/Area Number 13640229
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Astronomy
Research InstitutionHOKKAIDO UNIVERSITY

Principal Investigator

KOZASA Takashi  Hokkaido University, Graduate School of Science, Professor, 大学院・理学研究科, 教授 (90263368)

Project Period (FY) 2001 – 2003
Project Status Completed (Fiscal Year 2003)
Budget Amount *help
¥1,800,000 (Direct Cost: ¥1,800,000)
Fiscal Year 2003: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 2002: ¥1,000,000 (Direct Cost: ¥1,000,000)
Keywordsdust formation / supernoave / population III / dust / early universe / 星間物質 / 宇宙論 / presolar grains
Research Abstract

Dust formation in the ejecta of population III supernovae including not only core-collapse supernoave (CCSNe) but also pair instability supernovae (PISNE) was investigated. Two extreme cases are considered for the elemental composition in the ejecta ; unmixed and uniformly mixed cases within He-core. The results of the calculations for CCSNe and PISNe are summarized as follows ; (1)A variety of grain species condense in the unmixed ejecta reflecting the diffeience in the elemental composition at the formation site in the ejecta ; otherwise only silicate and oxide grains condense in the uniformly mixed ejecta. (2)The size distribution function of each grain species is approximately log-normal, except for Mg-silicate, MgO,Si,and FeS in the unmixed case, and Al_2O_3 in both cases. The size distribution function summed up over all grain species is approximated by a power-law formula whose index is -3.5 for the larger radius and -2.5 for the smaller one ; the radius at the crossover point ranges from 0.004 to 0.1μm, depending on the progenitor mass. (3)The fraction of mass locked into dust grains increases with increasing the progenitor mass : 2%〜5% of the progenitor mass for CCSNe and 15%〜30% for PISNe whose progenitor mass ranges from 140 to 260 M. Based on the calculated dust yield from supernovae, the amount of dust grains in the early universe is evaluated by applying a closed box model where the initial mass function, star formation rate, and dust destruction efficiency by interstellar shock are taken as the parameters. The result of calculation shows that the amount of dust is very sensitive to the dust destruction efficiency.

Report

(4 results)
  • 2003 Annual Research Report   Final Research Report Summary
  • 2002 Annual Research Report
  • 2001 Annual Research Report
  • Research Products

    (16 results)

All Other

All Publications (16 results)

  • [Publications] Yamamoto, T.: "Kinetic theory of steady chemical nucleation in the gas phase"Astronomy and Astrophysics. 330. 373-378 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Blum, J.: "First result from cosmic dust aggregation experiment codag"Advance in Space Research. 29. 497-503 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Chigai, T.: "Heterogeneous condensation of presolar titanium carbide core-graphite mantle spherules"Meteoritics & Planetary Science. 37. 1937-1951 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Nozawa, T.: "Dust in the early universe : Dust formation in the ejecta of population III supernovae"Astrophysical Journal. 598. 785-803 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Nozawa, T.: "Dust formation and evolution in the early universe"Proc.Origin of Matter and Evolution of the Galaxies. (in press). (2004)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] YAMAMOTO, Tetsuo: "Kinetic theory of steady chemical nucleation in the gas phase"Astronomy and Astrophysics. Vol.390. 373-378 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] BLUM, Juergen: "First result from cosmic dust aggregation experiment codag"Advance in Space Reseach. Vol.29. 497-503 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] CHIGAI, Takeshi: "Heterogeneous condensation of presolar titanium carbide core -graphite mantle spherules"Meteoritics & Planetary Science. Vol.37. 1937-1951 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] NOZAWA, Takaya: "Dust in the early universe : Dust formation in the ejecta of population III supernovae"Astrophysical Journal. Vol.598. 785-803 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] NOZAWA, Takaya: "Dust formation and evolution in the early universe"Proc.Origin of Matter and Evolution of the Galaxies. (in press). (2004)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Nozawa, T.: "Dust in the Early Universe : Dust Formation in the Ejecta of Population III Supernovae"Astrophysical Journal. 598. 785-803 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Nozawa, T.: "Dust Formation and Evolution in the Early Universe"Proc.Origin of Matter and Evolution of the Galaxies 2003. (in press). (2004)

    • Related Report
      2003 Annual Research Report
  • [Publications] Chigai, T.: "Heterogeneous condensation of presolar titanium carbide core-graphite mantle spherules"Meteoritics and Planetary Science. 37. 1937-1951 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Blum, J.: "First results from the cosmic dust aggregation experiment codag"Advance in Space Research. 29. 497-503 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Aoki, K.: "Simultaneous Formation of Presolar SiC and Graphite Grains"Proc.the 34th ISAS Lunar and Planetary Symp.. 34. 164-166 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Yamamoto, T.: "Kinetic Theory of Steady Chemical Nucleation in the Gas Phase"Astronomy and Astrophysics.

    • Related Report
      2001 Annual Research Report

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Published: 2002-04-01   Modified: 2016-04-21  

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