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
收藏
页码：674C / 676C
页数：3
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