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Prediction for the first generation stars from a Galactic halo chemical evolution model with Miller-Scalo initial mass function
Lu, Y; Zhao, G; Deng, LC; Cen, MR; Liang, YC
2001-02-01
Source PublicationASTRONOMY & ASTROPHYSICS
Volume367Issue:1Pages:277-281
AbstractA model of supernova-driven chemical evolution of the Galactic halo proposed by Tsujimoto et al. (1999) (TSY) is used to investigate the observations of the first generation stars (FGS). We assume in this paper that a star with a metallicity [Fe/H] less than or equal to -6 is truly a FGS. We obtain FGS probabilities with the Miller-Scalo form of the stellar initial mass function and limit our model parameters to values consistent with the observed metallicity distributions of metal-poor stars in the range of -4.0 < [Fe/H] < -1.0. We find a metallicity distribution function (MDF) of the long-lived halo field stars for [Fe/H] < -1 against the iron abundance in agreement with the observations. If the star formation in the halo is confined to individual gas clouds with masses from 1 10(7) to 1 10(8) M., our model suggests that the probability of identifying FGS in the halo is about 6.14 10(-5) to 6.14 10(-6).
KeywordGalaxy : Evolution Galaxy : Halo-stars : Abundance Stars : Formation Supernovae : General
Indexed BySCI
Language英语
WOS IDWOS:000167440000025
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/8578
Collection光学天文研究部
Affiliation1.Beijing Astron Observ, Beijing 100012, Peoples R China
2.Cent China Normal Univ, Dept Phys, Wuhan 430079, Peoples R China
Recommended Citation
GB/T 7714
Lu, Y,Zhao, G,Deng, LC,et al. Prediction for the first generation stars from a Galactic halo chemical evolution model with Miller-Scalo initial mass function[J]. ASTRONOMY & ASTROPHYSICS,2001,367(1):277-281.
APA Lu, Y,Zhao, G,Deng, LC,Cen, MR,&Liang, YC.(2001).Prediction for the first generation stars from a Galactic halo chemical evolution model with Miller-Scalo initial mass function.ASTRONOMY & ASTROPHYSICS,367(1),277-281.
MLA Lu, Y,et al."Prediction for the first generation stars from a Galactic halo chemical evolution model with Miller-Scalo initial mass function".ASTRONOMY & ASTROPHYSICS 367.1(2001):277-281.
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