The formation rate of blue stragglers in 47 Tucanae

被引：31

作者：

Sills, A

Bailyn, CD

Edmonds, PD

Gilliland, RL

机构：

[1] Ohio State Univ, Dept Astron, Columbus, OH 43210 USA

[2] Yale Univ, Dept Astron, New Haven, CT 06520 USA

[3] Harvard Univ, Coll Observ, Cambridge, MA 02138 USA

[4] Space Telescope Sci Inst, Baltimore, MD 21218 USA

来源：

ASTROPHYSICAL JOURNAL | 2000年 / 535卷 / 01期

关键词：

blue stragglers; globular clusters : individual (47 Tucanae);

D O I：

10.1086/308846

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We investigate the effects of changes in the blue straggler formation rate in globular clusters on the blue straggler distribution in the color-magnitude diagram. We find that the blue straggler distribution is highly sensitive to the past formation rate. Comparison of our models to new UBV observations of a region close to the core of 47 Tucanae suggests that this cluster may have stopped forming blue stragglers several Gyr ago. This cessation of formation can be associated with an epoch of primordial binary burning which has been invoked in other clusters to infer the imminence of core collapse.

引用

页码：298 / 303

页数：6

共 21 条

[1]

AURIERE M, 1988, ASTRON ASTROPHYS, V204, P106

[2] ON THE LUMINOSITY FUNCTION, LIFETIMES, AND ORIGIN OF BLUE STRAGGLERS IN GLOBULAR-CLUSTERS [J].