Spectroscopic studies of R-process elements in very metal-poor stars with Subaru/HDS

被引：0

作者：

Honda, S ^{[1
]}

Aoki, W ^{[1
]}

Kajino, T ^{[1
]}

Ando, H ^{[1
]}

Beers, TC ^{[1
]}

机构：

[1] Natl Astron Observ, Tokyo 181, Japan

来源：

ORIGIN OF MATTER & EVOLUTION OF GALAXIES 2003 | 2005年

关键词：

ABUNDANCES; GALAXY; RICH;

D O I：

10.1142/9789812702739_0044

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present the abundance analyses for the neutron-capture elements in very metal-poor stars based on the high-quality spectra obtained with the Subaru Telescope High Dispersion Spectrograph. Our study covers elements from light neutron-capture nuclei to the heaviest ones. The abundance patterns of elements around Ba and Eu are quite similar to that of the r-process component in solar-system material, suggesting the origin of neutron-capture elements is r-process in these metal-poor stars. However, the abundance ratios between Sr and Ba show a very large scatter. Th/Eu ratios also show a scatter, even though that is much smaller than the scatter found in Sr/Ba. These results provide a quite useful constraints on r-process modeling and will be useful to search for the sites of this process.

引用

页码：440 / 445

页数：6