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
收藏
页码：335 / 338
页数：4
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