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Distributions of neutron exposures in AGB stars and the galaxy
Cui, Wen-Yuan; Zhang, Feng-Hua; Zhang, Wei-Juan; Zhang, Lu; Zhang, Bo
2007
发表期刊CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS
卷号7期号:2页码:224-234
摘要Based on the s-process nucleosynthesis model with the C-13 (alpha, n) O-16 reaction occurring under radiative conditions in the interpulse phases, we investigate the characteristics of the distribution of neutron exposure in low-mass Asymptotic Giant Branch (AGB) stars. We introduce a new concept, the distribution of neutron exposures of the Galaxy (NEG), to study the chemical evolution characteristics of the Galaxy for s-process elements. Using a chemical evolution model of the Galaxy, we,develop a model for the NEG and obtain the evolution results of the NEG in different epochs. The present results appear to reasonably reproduce the distribution of neutron exposures of the solar system (hereafter NES). The main component and the strong component in the NES are built up in different epochs. The strong component of the s-process is mainly synthesised in the low-mass and metal-poor AGB stars, and the main component is produced by the s-process in the low-mass AGB stars with higher metallicities.
关键词Galaxy : Evolution Stars : Agb And post-Agb Stars : Abundances
收录类别SCI
语种英语
WOS记录号WOS:000246129300006
引用统计
文献类型期刊论文
条目标识符http://ir.bao.ac.cn/handle/114a11/8909
专题光学天文研究部
作者单位1.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
2.Hebei Normal Univ, Dept Phys, Shijiazhuang 050016, Peoples R China
3.Univ Sci & Technol China, Dept Modern Phys, Hefei 230026, Peoples R China
4.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China
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GB/T 7714
Cui, Wen-Yuan,Zhang, Feng-Hua,Zhang, Wei-Juan,et al. Distributions of neutron exposures in AGB stars and the galaxy[J]. CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS,2007,7(2):224-234.
APA Cui, Wen-Yuan,Zhang, Feng-Hua,Zhang, Wei-Juan,Zhang, Lu,&Zhang, Bo.(2007).Distributions of neutron exposures in AGB stars and the galaxy.CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS,7(2),224-234.
MLA Cui, Wen-Yuan,et al."Distributions of neutron exposures in AGB stars and the galaxy".CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS 7.2(2007):224-234.
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