Chemical Evolution of R-process Elements in the Hierarchical Galaxy Formation
Chemical Evolution of R-process Elements in the Hierarchical Galaxy Formation
复制标题
分层星系形成中 R 过程元素的化学演化
DOI：
10.1017/s1743921315008662
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
Toshikazu
中科院分区：
文献类型：
--
作者：
Komiya;Yutaka; Shigeyama;Toshikazu
The main astronomical source of r-process elements has not yet been identified. One plausible site is neutron star mergers (NSMs). From the perspective of Galactic chemical evolution, however, it has been pointed out that the NSM scenario is incompatible with observations. Recently, Tsujimoto & Shigeyama (2014) pointed out that NSM ejecta can spread into much larger volume than ejecta from a supernova. We re-examine the chemical evolution of r-process elements under the NSM scenario considering this difference in propagation of the ejecta. We find that the NSM scenario can be compatible with the observed abundances of the Milky Way halo stars.
