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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
Source PublicationCHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS
Volume7Issue:2Pages:224-234
AbstractBased 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.
KeywordGalaxy : Evolution Stars : Agb And post-Agb Stars : Abundances
Indexed BySCI
Language英语
WOS IDWOS:000246129300006
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/8909
Collection光学天文研究部
Affiliation1.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
Recommended Citation
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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