Vilnius photometry of the red horizontal branch stars in the Galactic thick disk

被引：4
|
作者：
Tautvaisiene, G
机构：
[1] Inst. of Theor. Phys. and Astronomy, Vilnius 2600
来源：
ASTRONOMISCHE NACHRICHTEN | 1996年 / 317卷 / 01期
关键词：
red horizontal branch stars; photometry; fundamental parameters; stellar evolution;
D O I：
10.1002/asna.2113170109
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The photometric observations and three-dimensional classification in the Vilnius system have been carried out for 13 of the red horizontal branch (RHB) stars in the Galactic thick disk identified by Rose (1985). The photometric spectral types, metallicities [Fe/H], effective temperatures, surface gravities and absolute magnitudes are determined. The age of about 10-12 Gyr is evaluated for this group of stars from comparison with model isochrones, indicating that the age of the thick disk is intermediate between the disk globular and the oldest open clusters.
引用
收藏
页码：29 / 34
页数：6
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