Li-rich giants: A survey based on IRAS colours

被引：23
|
作者：
Castilho, BV
Gregorio-Hetem, J
Spite, F
Spite, M
Barbuy, B
机构：
[1] Univ Sao Paulo, IAG, Dept Astron, BR-01060970 Sao Paulo, Brazil
[2] Observ Paris, F-92195 Meudon, France
来源：
ASTRONOMY & ASTROPHYSICS SUPPLEMENT SERIES | 1998年 / 127卷 / 02期
关键词：
stars; abundances; infrared; late type;
D O I：
10.1051/aas:1998338
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
In a previous work we studied the IRAS colours of knows Li-rich red giants and showed that they have flux ratios F-12/F-25 and F-25/F-60 in well defined ranges. By using this result as a selection criterion, we prepared a list of 280 IRAS Point Source candidates to be Li-rich giant stars. Up to the present we have obtained spectra for 57% of our target list. We identified five stars showing a strong LiI 670.079 mn line and six ones with a Li line of medium strength. Most of the candidates show features typical of normal giants having circumstellar dust, as indicated by their IRAS colours.
引用
收藏
页码：139 / 144
页数：6
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