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EMP stars with high mass IMF and hierarchical galaxy formation

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Title: EMP stars with high mass IMF and hierarchical galaxy formation
Authors: Komiya, Yutaka Browse this author
Suda, Takuma Browse this author
Habe, Asao Browse this author →KAKEN DB
Fujimoto, Masayuki Y. Browse this author
Keywords: stars: abundances
stars: Population II
Galaxy: evolution
Galaxy: halo
Issue Date: 2009
Publisher: Cambridge University Press
Journal Title: Proceedings of the International Astronomical Union
Volume: 5
Issue: S265
Start Page: 128
End Page: 129
Publisher DOI: 10.1017/S1743921310000384
Abstract: Extremely metal-poor (EMP) stars in the Galactic halo are stars formed in the very early stage of the chemical evolution of the Galaxy. In previous study, we proposed that typical mass of EMP stars are massive, based on observations of carbon-enhanced EMP stars. In this study, we build a merger tree of the Galaxy semi-analytically and follow the chemical evolution along the merger tree. We also consider the effect of binary and high-mass initial mass function(IMF). Resultant theoretical metallicity distribution function (MDF) and abundance distribution are compared with observed metal-poor halo stars.
Rights: © International Astronomical Union 2010
Type: proceedings
Appears in Collections:理学院・理学研究院 (Graduate School of Science / Faculty of Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 羽部 朝男

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