SPACE VELOCITIES OF 14 GLOBULAR-CLUSTERS

被引:101
作者
CUDWORTH, KM [1 ]
HANSON, RB [1 ]
机构
[1] UNIV CALIF SANTA CRUZ, UNIV CALIF OBSERV LICK OBSERV, SANTA CRUZ, CA 95064 USA
关键词
D O I
10.1086/116417
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
Relative proper motions for 14 globular clusters are converted to absolute proper motions using a new procedure that uses results from the Lick program of proper motions relative to galaxies. These absolute proper motions are then used to derive space velocities for the clusters. The space velocities generally confirm the picture of disk and halo populations of globulars that had been deduced from radial velocity data alone, but there are a few surprises; most notably M4 and M28 are moderately metal-poor but in orbits confined to the disk. We also find a very high space velocity for M5.
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页码:168 / 172
页数:5
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