A W UMa contact binary in the globular cluster NGC 6397

被引：22
|
作者：
Rubenstein, EP [1 ]
Bailyn, CD [1 ]
机构：
[1] ASSOC UNIV RES ASTRON INC,CERRO TOLOLO INTER AMER OBSERV,WASHINGTON,DC
来源：
ASTRONOMICAL JOURNAL | 1996年 / 111卷 / 01期
关键词：
D O I：
10.1086/117778
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We report the identification of a W UMa contact binary less than or similar to 2' from the center of the metal-poor core-collapse globular cluster NGC 6397. The photometric properties of this binary system are consistent with cluster membership. The orbital period is 0.27 days. Fits to theoretical models suggest that the total mass of the system is likely to be greater than the mass of main-sequence turnoff stars. Moreover, since this system is losing angular momentum it will ultimately coalesce and may become a blue snaggier. None of the other approximate to 3000 cluster members observed, including 14 blue stragglers for which there are time series data, showed significant variability. (C) 1996 American Astronomical Society.
引用
收藏
页码：260 / 266
页数：7
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