An explanation of the correlations of abundance ratio between neutron-capture elements and iron group elements in Ba stars
An explanation of the correlations of abundance ratio between neutron-capture elements and iron group elements in Ba stars
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DOI：
10.1007/s10509-012-1287-z
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发表时间：
2013-02
影响因子：
1.9
通讯作者：
Xiaojing Shen;Bo Zhang;Hong-jie Li;Shuai Liang;W. Cui
中科院分区：
文献类型：
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作者：
Xiaojing Shen;Bo Zhang;Hong-jie Li;Shuai Liang;W. Cui
Ba星的化学丰度是很好的信息设置约束的s-过程核合成模型。在这项工作中，我们采用了一种新的分析方法来确定从个别中子捕获过程的Ba星的元素丰度的相对贡献。结果表明，S过程元素的产生应伴随着Cu和Zn的产生，Cu和Zn丰度的计算结果与观测值吻合较好。Ba星的[Cu，Zn/Fe]-[s/Fe]关联可以用Ba星形成的双星方案来解释。
The chemical abundances of the Ba stars are excellent information for setting constraints on models of s-processes nucleosynthesis. In this work, we adopt a new analysis approach to determine the relative contributions from individual neutron-capture processes to the elemental abundances of Ba stars. We find that the production of s-process elements should accompany by the production of Cu and Zn, the calculated results on Cu and Zn abundances are in quite good agreement with observed data. The observed [Cu, Zn/Fe]–[s/Fe] correlations of Ba stars can be explained by binary scenario in which Ba stars formed.