%0 Journal Article
%T Neutron-Capture Elements in the Double-Enhanced Star HE 1305-0007: a New s- and r-Process Paradigm<br>Neutron-Capture Elements in the Double-Enhanced Star HE 1305-0007： a New s- and r-Process Paradigm
%A CUI Wen-Yuan
%A CUI Dong-Nuan
%A DU Yun-Shuang
%A ZHANG Bo
%A <br>崔文元
%A 崔冬暖
%A 杜云霜
%A 张波
%J 中国物理快报
%D 2007
%I 
%X The star HE 1305-0007 is a metal-poor double-enhanced star with metallicity Fe/H] = -2.0, which is just at the upper limit of the metallicity 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-commonenvelope 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.
%K 97
%K 10
%K Cv
%K 26
%K 45
%K +h
%K 97
%K 10
%K Tk<br>中子
%K 捕获
%K 金属性
%K 参数模型
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=E27DA92E19FE279A273627875A70D74D&aid=03664AC44D4808189CF1CE946E299A4B&yid=A732AF04DDA03BB3&vid=B91E8C6D6FE990DB&iid=94C357A881DFC066&sid=656BC79BFC7F0F4B&eid=76DAC16A9BFED90B&journal_id=0256-307X&journal_name=中国物理快报&referenced_num=0&reference_num=0