Searching for s-Process-Enhanced Metal-Poor Stars

被引：1

作者：

Cruz, M. A. ^{[1
]}

Rossi, S. ^{[2
]}

Beers, T. C. ^{[3
,4
]}

机构：

[1] Max Planck Inst Astrophys, D-85748 Garching, Germany

[2] Univ Sao Paulo, Dept Astron, Inst Astron Geofis & Ciencias Atmosfer, BR-05508090 Sao Paulo, Brazil

[3] Michigan State Univ, Dept Phys & Astron, CSCE, E Lansing, MI 48824 USA

[4] Michigan State Univ, JINA, E Lansing, MI 48824 USA

来源：

PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF AUSTRALIA | 2009年 / 26卷 / 03期

基金：

巴西圣保罗研究基金会; 美国国家科学基金会;

关键词：

surveys; techniques: spectroscopic; stars: abundances; DIGITAL SKY SURVEY; STELLAR; ABUNDANCE;

D O I：

10.1071/AS08042

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present preliminary results for the estimation of barium [Ba/Fe], and strontium [Sr/Fe], abundances ratios using medium-resolution spectra (1-2 angstrom). We established a calibration between the abundance ratios and line indices for Ba and Sr, using multiple regression and artificial neural network techniques. A comparison between the two techniques (showing the advantage of the latter), as well as a discussion of future work, is presented.

引用

页码：335 / 338

页数：4

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