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Neutron-capture elements in the double-enhanced star HE 1305-0007: a new s- and r-process paradigm
Cui Wen-Yuan; Cui Dong-Nuan; Du Yun-Shuang; Zhang Bo
2007-05-01
发表期刊CHINESE PHYSICS LETTERS
卷号24期号:5页码:1417-1420
摘要The star HE 1305-0007 is a metal-poor double-enhanced star with metallicity [Fe/H] = -2.0, which is just it the upper limit of the inetallicity for the observed double-enhanced stars. Using a parametric model, we find that almost all s-elements were made in a single neutron exposure. This star should be a member of a post-common-envelope binary. After the s-process material has experienced only one neutron exposure in the nucleosynthesis region and is dredged-up to its envelope, the AGB evolution is terminated by the onset of common-envelope evolution. Based on the high radial-velocity of HE 1305-0007, we speculate that the star could be a runaway star from a binary system, in which the AIC event has occurred and produced the r-process elements.
收录类别SCI
语种英语
WOS记录号WOS:000246659400081
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文献类型期刊论文
条目标识符http://ir.bao.ac.cn/handle/114a11/7890
专题光学天文研究部
作者单位1.Hebei Normal Univ, Dept Phys, Shijiazhuang 050016, Peoples R China
2.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
3.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China
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GB/T 7714
Cui Wen-Yuan,Cui Dong-Nuan,Du Yun-Shuang,et al. Neutron-capture elements in the double-enhanced star HE 1305-0007: a new s- and r-process paradigm[J]. CHINESE PHYSICS LETTERS,2007,24(5):1417-1420.
APA Cui Wen-Yuan,Cui Dong-Nuan,Du Yun-Shuang,&Zhang Bo.(2007).Neutron-capture elements in the double-enhanced star HE 1305-0007: a new s- and r-process paradigm.CHINESE PHYSICS LETTERS,24(5),1417-1420.
MLA Cui Wen-Yuan,et al."Neutron-capture elements in the double-enhanced star HE 1305-0007: a new s- and r-process paradigm".CHINESE PHYSICS LETTERS 24.5(2007):1417-1420.
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