Enrichment of neutron-capture elements in our galaxy at the early epoch

被引：10

作者：

Ishimaru, Y ^{[1
]}

Wanajo, S ^{[1
]}

机构：

[1] Univ Tokyo, Dept Astron, Bunkyo Ku, Tokyo 1130033, Japan

来源：

FIRST STARS | 2000年

关键词：

D O I：

10.1007/10719504_34

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Recent observations of halo stars show large dispersions in abundances, especially for neutron-capture elements. These dispersions may indicate that the inter-stellar medium was not mixed well at the early epoch. If star formations are induced by supernovae, chemical compositions of stars should be determined by each supernova yield. Under this assumption, we construct a new evolution model of our Galaxy. We examine distributions of stellar abundance ratios, and find the inhomogenious enrichment causes the observed dispersions. We also determine the origins of neutron-capture elements, by comparing our results with observations.

引用

页码：189 / 193

页数：5

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