中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
The probability of detecting first generation stars of the Galaxy

文献类型:期刊论文

作者Cen, MR; Lu, Y; Zhao, G
刊名CHINESE ASTRONOMY AND ASTROPHYSICS
出版日期2001-10-01
卷号25期号:4页码:432-438
关键词Galactic halo model of chemical evolution Population III stars initial mass function
英文摘要First generation stars are the oldest stars that were formed in post-big bang, primitive gas, containing no elements heavier than carbon, with ages greater than 14 Gyr and having undergone no evolution so far. Observations over a long time have confirmed that, up to now, no stars with zero metallicity ([Fe/H]) or with [Fe/H]less than or equal to -6 have been found in the Galaxy. To explain this absence, we shall make a theoretical calculation of the probability of detecting first generation stars using Tsuiimoto et al.'s model of chemical evolution of the galactic halo and assuming an initial mass function of the Miller-Scalo form. We use all the observational data on the halo stars to constrain the parameters. Our result is that, if the mass of the cloud that formed the stars is 10(6)-10(7) M-circle dot, then the probability of detecting first generation stars is 6.14x10(-4)-6.14x10(-5).
收录类别SCI
语种英语
WOS记录号WOS:000172661300006
源URL[http://ir.bao.ac.cn/handle/114a11/8613]  
专题国家天文台_光学天文研究部
作者单位1.Huazhong Normal Univ, Dept Phys, Wuhan 430079, Peoples R China
2.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
推荐引用方式
GB/T 7714
Cen, MR,Lu, Y,Zhao, G. The probability of detecting first generation stars of the Galaxy[J]. CHINESE ASTRONOMY AND ASTROPHYSICS,2001,25(4):432-438.
APA Cen, MR,Lu, Y,&Zhao, G.(2001).The probability of detecting first generation stars of the Galaxy.CHINESE ASTRONOMY AND ASTROPHYSICS,25(4),432-438.
MLA Cen, MR,et al."The probability of detecting first generation stars of the Galaxy".CHINESE ASTRONOMY AND ASTROPHYSICS 25.4(2001):432-438.

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来源:国家天文台

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