The study of s-process nucleosynthesis based on barium stars, CEMP-s and CEMP-r/s stars
文献类型：期刊论文
| 作者 | Cui, Wenyuan1,2,3; Shi, Jianrong2 ; Geng, Yuanyuan1; Zhang, Caixia1; Meng, Xiaoying1; Shao, Lang1; Zhang, Bo1
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| 刊名 | ASTROPHYSICS AND SPACE SCIENCE
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| 出版日期 | 2013-08-01 |
| 卷号 | 346期号:2页码:477-492 |
| 关键词 | Nucleosynthesis Abundances Stars: AGB Stars: barium |
| 英文摘要 | In order to get a broader view of the s-process nucleosynthesis we study the abundance distribution of heavy elements of 35 barium stars and 24 CEMP-stars, including nine CEMP-s stars and 15 CEMP-r/s stars. The similar distribution of [Pb/hs] between CEMP-s and CEMP-r/s stars indicate that the s-process material of both CEMP-s and CEMP-r/s stars should have a uniform origin, i.e. mass transfer from their predominant AGB companions. For the CEMP-r/s stars, we found that the r-process should provide similar proportional contributes to the second s-peak and the third s-peak elements, and also be responsible for the higher overabundance of heavy elements than those in CEMP-s stars. Which hints that the r-process origin of CEMP-r/s stars should be closely linked to the main r-process. The fact that some small r values exist for both barium and CEMP-s stars, implies that the single exposure event of the s-process nucleosynthesis should be general in a wide metallicity range of our Galaxy. Based on the relation between C (r) and C (s), we suggest that the origin of r-elements for CEMP-r/s stars have more sources. A common scenario is that the formation of the binary system was triggered by only one or a few supernova. In addition, accretion-induced collapse(AIC) or SN 1.5 should be the supplementary scenario, especially for these whose pre-AGB companion with higher mass and smaller orbit radius, which support the higher values of both C (r) and C (s). |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000321214800020 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/5963]  |
| 专题 | 国家天文台_光学天文研究部 |
| 作者单位 | 1.Hebei Normal Univ, Dept Phys, Yuhua Dist 050024, Shijiazhuang, Peoples R China 2.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China 3.Shandong Univ, Dept Phys, Jinan 250100, Shandong, Peoples R China |
| 推荐引用方式 GB/T 7714 | Cui, Wenyuan,Shi, Jianrong,Geng, Yuanyuan,et al. The study of s-process nucleosynthesis based on barium stars, CEMP-s and CEMP-r/s stars[J]. ASTROPHYSICS AND SPACE SCIENCE,2013,346(2):477-492. |
| APA | Cui, Wenyuan.,Shi, Jianrong.,Geng, Yuanyuan.,Zhang, Caixia.,Meng, Xiaoying.,...&Zhang, Bo.(2013).The study of s-process nucleosynthesis based on barium stars, CEMP-s and CEMP-r/s stars.ASTROPHYSICS AND SPACE SCIENCE,346(2),477-492. |
| MLA | Cui, Wenyuan,et al."The study of s-process nucleosynthesis based on barium stars, CEMP-s and CEMP-r/s stars".ASTROPHYSICS AND SPACE SCIENCE 346.2(2013):477-492. |
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来源：国家天文台
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