A reinvestigation of the possible metallicity spread in NGC 3201

被引:15
作者
Covey, KR
Wallerstein, G
Gonzalez, G
Vanture, AD
Suntzeff, NB
机构
[1] Univ Washington, Dept Astron, Seattle, WA 98195 USA
[2] AURA Inc, Cerro Tololo Interamer Observ, La Serena, Chile
[3] Everett Community Coll, Div Sci, Everett, WA 98201 USA
关键词
D O I
10.1086/376394
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We have conducted a reanalysis of the metallicity of six red giants within NGC 3201 on the basis of a new homogeneous set of spectra with resolution similar to30,000. Iron line strengths and the MOOG software suite were used to derive metallicities based on spectroscopically and photometrically estimated values of T-eff and log g. We cannot confirm the presence of a significant spread in metallicity within the cluster greater than about 0.3 dex nor any significant correlation between metallicity and temperature, as first suggested by Gonzalez & Wallerstein. We call attention to the possibility that differences in boundary temperature for stars of the same T-eff may lead to apparent differences in metallicity.
引用
收藏
页码:819 / 824
页数:6
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