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A statistical model for predicting the average abundance patterns of heavier elements in metal-poor stars
Zhang, B; Zhang, YX; Li, J; Peng, QH
2002-10-01
Source PublicationCHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS
Volume2Issue:5Pages:429-440
AbstractWe have collected nearly all the available observed data of the elements from Ba to Dy in halo and disk stars in the metallicity range -4.0 <[Fe/H]< 0.5. Based on the observed data of Ba and Eu, we evaluated the least-squares regressions of [Ba/Fe] on [Fe/H], and [Eu/H] on [Ba/H]. Assuming that the heavy elements (heavier than Ba) are produced by a combination of the main components of s- and r-processes in metal-poor stars, and choosing Ba and Eu as respective representative elements of the main s- and the main r-processes, a statistical model for predicting the Galactic chemical evolution of the heavy elements is presented. With this model, we calculate the mean abundance trends of the heavy elements La, Ce, Pr, Nd, Sm, and Dy with the metallicity. We compare our results with the observed data at various metallicities, showing that the predicted trends are in good agreement with the observed trends, at least for the metallicity range [Fe/H]greater than or equal to -2.5. Finally, we discuss our results and deduce some important information about the Galactic chemical evolution.
KeywordStars : Abundances Stars : Population Ii Galaxy : Evolution Method : Statistical
Indexed BySCI
Language英语
WOS IDWOS:000178799000006
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Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/8632
Collection光学天文研究部
Affiliation1.Hebei Normal Univ, Dept Phys, Shijiazhuang 050016, Peoples R China
2.Natl Lab Heavy Ion Accelerator, Ctr Theoret Nucl Phys, Lanzhou 730000, Peoples R China
3.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
4.Nanjing Univ, Dept Astron, Nanjing 210093, Peoples R China
Recommended Citation
GB/T 7714
Zhang, B,Zhang, YX,Li, J,et al. A statistical model for predicting the average abundance patterns of heavier elements in metal-poor stars[J]. CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS,2002,2(5):429-440.
APA Zhang, B,Zhang, YX,Li, J,&Peng, QH.(2002).A statistical model for predicting the average abundance patterns of heavier elements in metal-poor stars.CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS,2(5),429-440.
MLA Zhang, B,et al."A statistical model for predicting the average abundance patterns of heavier elements in metal-poor stars".CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS 2.5(2002):429-440.
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