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The probability of detecting first generation stars of the Galaxy
Cen, MR; Lu, Y; Zhao, G
2001-10-01
Source PublicationCHINESE ASTRONOMY AND ASTROPHYSICS
Volume25Issue:4Pages:432-438
AbstractFirst 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).
KeywordGalactic Halo Model Of Chemical Evolution Population Iii Stars Initial Mass Function
Indexed BySCI
Language英语
WOS IDWOS:000172661300006
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/8613
Collection光学天文研究部
Affiliation1.Huazhong Normal Univ, Dept Phys, Wuhan 430079, Peoples R China
2.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
Recommended Citation
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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