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2010 Fiscal Year Final Research Report

A Study of the Stars and the Structure Formation History in the Early Universe

Research Project

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Project/Area Number 18104003
Research Category

Grant-in-Aid for Scientific Research (S)

Allocation TypeSingle-year Grants
Research Field Astronomy
Research InstitutionHokkaido University

Principal Investigator

FUJIMOTO Masayuki  北海道大学, 大学院・理学研究院, 教授 (00111708)

Co-Investigator(Kenkyū-buntansha) NOMOTO Ken'ichi  東京大学, 数物連携宇宙研究機構, 特任教授 (90110676)
KOZASA Takashi  北海道大学, 大学院・理学研究院, 教授 (90263368)
AOKI Wako  国立天文台, 光赤外研究部, 助教 (20321581)
SUDA Takuma  国立天文台, 光赤外研究部, 博士研究員 (90374735)
TSUJI Takashi  東京大学, 名誉教授 (20011546)
Project Period (FY) 2006 – 2010
Keywords恒星進化 / 元素合成 / 恒星大気 / 宇宙塵 / 銀河系形成
Research Abstract

Recent presence of stars with heavier elements other than hydrogen and helium less than a thousandth of the solar abundances is revealed thanks to large-scale surveys and high dispersion spectroscopy studies with large telescope of diameter 8m for the Galactic halo. These stars are the low-mass survivors of the stars formed in early Universe just after the Big Bang. In this study, we investigate the characteristics of these extremely metal-poor stars theoretically and observationally to explore what are the first stars born first and in early stage in our Universe. In addition, with these stars as probe, we study and derive a new picture on the early evolution of Universe and the formation process of our Milky Way galaxy.

  • Research Products

    (20 results)

All 2011 2010 2009 2008 2007 Other

All Journal Article (18 results) (of which Peer Reviewed: 18 results) Presentation (1 results) Remarks (1 results)

  • [Journal Article] The Stellar Abundances for Galactic Archaeology (SAGA) Database II-Implications for Mixing and Nucleosynthesis in Extremely Metal-Poor Stars and Chemical Enrichment of the Galaxy2011

    • Author(s)
      T. Suda, S. Yamada, Y. Katsuta, Y. Komiya, C. Ishizuka, T. Nishimura, W. Aoki, M. Y. Fujimoto
    • Journal Title

      Monthly Notices of the Royal Astronomical Society

      Volume: Vol.412, No.2 Pages: 843-874

    • Peer Reviewed
  • [Journal Article] Formation of Dust in the Ejecta of Type Ia Supernovae2011

    • Author(s)
      Nozawa, T., Maeda, K., Kozasa, T., Tanaka, M., Nomoto, K., Umeda, H
    • Journal Title

      Astrophysical Journal

      Volume: Vol.736, No.1 Pages: 45-57

    • Peer Reviewed
  • [Journal Article] The Role of Dust in the Early Universe. I. Protogalaxy Evolution2011

    • Author(s)
      Yamasawa, D., Habe, A., Kozasa, T., Nozawa, T., Hirashita, H., Umeda, H., Nomoto, K
    • Journal Title

      Astrophysical Journal

      Volume: Vol.735, No.44 Pages: 44-57

    • Peer Reviewed
  • [Journal Article] Formation History of Metal-poor Halo Stars with the Hierarchical Model and the Effect of Interstellar Matter Accretion on the Most Metal-poor Stars2010

    • Author(s)
      Komiya, Y., Habe, A., Suda, T., Fujimoto, M. Y.
    • Journal Title

      Astrophysical Journal

      Volume: vol.717, No.1 Pages: 542-561

    • Peer Reviewed
  • [Journal Article] Evolution of low-and intermediate-mass stars with [Fe/H] <=-2.52010

    • Author(s)
      Suda, T., Fujimoto, M. Y.
    • Journal Title

      Monthly Notices of the Royal Astronomical Society

      Volume: Vol.405, No.1 Pages: 177-193

    • Peer Reviewed
  • [Journal Article] Oxygen and Light Element Synthesis by Neutron-Capture Reactions in Metal-Free and Extremely Metal-Poor AGB Stars2009

    • Author(s)
      Takanori, Nishimura, Masayuki Aikawa
    • Journal Title

      Publication of the Astronomical Society of Japan

      Volume: vol.61, No.5 Pages: 909-929

    • Peer Reviewed
  • [Journal Article] Hierarchical Formation of the Galactic Halo and the Origin of Hyper Metal-Poor Stars2009

    • Author(s)
      Y. Komiya, A. Habe, T. Suda, M.Y. Fujimoto
    • Journal Title

      Astrophysical Journal Letters

      Volume: vol.696, No.1 Pages: L79-L83

    • Peer Reviewed
  • [Journal Article] Early-Age Evolution of the Milky Way Related by Extremely Metal-Poor Stars2009

    • Author(s)
      Y. Komiya, T. Suda, and M. Y. Fujimoto
    • Journal Title

      Astrophysical Journal

      Volume: vol.694 Pages: 1577-1594

    • Peer Reviewed
  • [Journal Article] Carbon-Enhanced Metal-Poor Stars. III. Main-Sequence Turnoff Stars from the SDSS SEGUE Sample2008

    • Author(s)
      Aoki, W., Beers, T. C., Sivarani, T. Marsteller, B., Lee, Y.S., Honda, S., Norris, J. E. Ryan, S., Carollo, D.
    • Journal Title

      Astrophysical Journal

      Volume: Vol.678, No.2 Pages: 1351-1371

    • Peer Reviewed
  • [Journal Article] Asphericity in Supernova Explosions from Late-Time Spectroscopy2008

    • Author(s)
      Maeda, K. Nomoto, K., 他16名
    • Journal Title

      Science

      Volume: Vol.319, No.5867 Pages: 1220-1223

    • Peer Reviewed
  • [Journal Article] Stellar Abundances for the Galactic Archeology (SAGA) Database-Compilation of the Characteristics of Known Extremely Metal-Poor Stars2008

    • Author(s)
      T. Suda, Yutaka. Katsuta, Shimako. Yamada, Tamon. Suwa, Chieko. Ishizuka, Y. Komiya, Kazuo., Sorai, M. Aikawa, and M. Y. Fujimoto
    • Journal Title

      Publication of the Astronomical Society of Japan

      Volume: vol.60, No.5 Pages: 1159-1171

    • Peer Reviewed
  • [Journal Article] Extinction curves flattened by reverse shocks in supernovae2008

    • Author(s)
      H. Hirashita, T. Nozawa, T.T. Takeuchi, T. Kozasa
    • Journal Title

      Monthly Notices of the Royal Astronomical Society

      Volume: Vol.384, No.2 Pages: 1725-1732

    • Peer Reviewed
  • [Journal Article] Formation of Dust in the Ejecta of Type Ib SN 2006jc and Temperature and Mass of the Dust2008

    • Author(s)
      Nozawa, T., Kozasa, T., Tominaga, N., Sakon, I., Tanaka, M., Suzuki, T., Nomoto, K., Maeda, K., Umeda, H., Limongi, M., Onaka, T.
    • Journal Title

      Astrophysical Journal

      Volume: Vol.684, No.3 Pages: 1343-1350

    • Peer Reviewed
  • [Journal Article] Carbon-enhanced Metal-poor Stars. I. Chemical Compositions of 26 Stars2007

    • Author(s)
      W. Aoki, T. C. Beers, N. Christlieb, J. E. Norris, S. G. Ryan, S. Tsangarides
    • Journal Title

      Astrophysical Journal

      Volume: vol.655, No.1 Pages: 492-521

    • Peer Reviewed
  • [Journal Article] The Aspherical Properties of the Energetic Type Ic SN 2002ap as Inferred from Its Nebular Spectra2007

    • Author(s)
      P. A. Mazzali K. Nomoto, 他11名
    • Journal Title

      Astrophysical Journal

      Volume: vol.670, No.1 Pages: 592-599

    • Peer Reviewed
  • [Journal Article] The Connection between Gamma-Ray Bursts and Extremely Metal-Poor Stars : Black-Hole Forming Supernovae with Relativistic Jets2007

    • Author(s)
      N. Tominaga, K. Maeda, H. Umeda, K. Nomoto, M., N. Iwamoto, T. Suzuki, A. Mazzali
    • Journal Title

      Astrophysical Journal

      Volume: vol.657, No.2 Pages: L77-L80

    • Peer Reviewed
  • [Journal Article] Evolution of Dust in Primordial Supernova Remnants : Can Dust Grains Formed in the Ejecta Survive and Be Injected into the Early Interstellar Medium?2007

    • Author(s)
      T. Nozawa, T. Kozasa, A. Habe, E. Dwek, H. Umeda, N.Tominaga, K. Maeda, K. Nomoto
    • Journal Title

      Astrophysical Journal

      Volume: Vol.666, No.2 Pages: 955-966

    • Peer Reviewed
  • [Journal Article] The Origin of Carbon-Enhancement and Initial Mass Function of Extremely Metal-Poor Stars in the Galactic Halo2007

    • Author(s)
      Y. Komiya, T. Suda, H. Minaguchi, T. Shigeyama, W. Aoki, and M.Y. Fujimoto
    • Journal Title

      Astrophysical Journal

      Volume: Vol.658, No.1 Pages: 367-390

    • Peer Reviewed
  • [Presentation]2007

    • Author(s)
      M. Y. Fujimoto,(Char), T, Kozasa(Co-Chair), W. Aoki(Co-char), T. Suda(Co-Chair), K., Nomoto, 他13名
    • Organizer
      10th internal Symposium on Origin of Matter and Evolution of Galaxies (OMEG10), LOC
    • Place of Presentation
      Sapporo, Japan
    • Year and Date
      20071204-7
  • [Remarks] SAGA(銀河考古学のための星の組成)データベース(The Stellar Abundances for Galactic Archaeology Database)

    • URL

      http://saga.sci.hokudai.ac.jp/

URL: 

Published: 2013-07-31  

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