New detections of r-process elements in extremely metal-poor stars with Subaru/HDS

被引：6

作者：

Honda, S ^{[1
]}

Aoki, W ^{[1
]}

Ando, H ^{[1
]}

Kajino, T ^{[1
]}

机构：

[1] Natl Astron Observ, Mitaka, Tokyo 1818588, Japan

来源：

NUCLEAR PHYSICS A | 2003年 / 718卷

关键词：

D O I：

10.1016/S0375-9474(03)00885-6

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

We have obtained high-resolution, high quality spectra of 22 very metal-poor stars with Subaru/HDS, in order to carry out detailed abundance studies of their neutron-capture elements. We have detected Th in seven stars in our sample. The abundance pattern of the heavy neutron-capture elements (56 < Z < 69) of these stars is similar to the r-process component in the solar-system. However, the Th abundances relative to other neutron-capture elements show a non-negligible departure from the abundance pattern of the solar-system r-process component. The meaning of this result in the context of studies of the r-process and cosmocronology are discussed.

引用

页码：674C / 676C

页数：3

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