Whiting 1: A new halo young globular cluster

被引:29
作者
Carraro, G [1 ]
机构
[1] Univ Chile, Dept Astron, Santiago, Chile
基金
美国国家科学基金会;
关键词
open clusters and associations : general; open clusters and associations : individual (Whiting 1);
D O I
10.1086/428945
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We report on BVI CCD photometry of a field centered in the region of the Galactic star cluster Whiting 1 down to V = 23.0. This cluster has never been studied insofar, and we provide for the first time estimates of its fundamental parameters, namely, radial extent, age, distance, and reddening. Whiting 1 turns out to be a compact star cluster with a diameter of about 1'. We find that the cluster is about 5 Gyr old and has a probable metal abundance around [Fe/H] = -1.20. Its position at b = -60.degrees64 and at a heliocentric distance of about 45 kpc makes the cluster a rather strange object, surely not a disk old open cluster, but perhaps the youngest halo globular cluster insofar known.
引用
收藏
页码:L61 / L64
页数:4
相关论文
共 8 条