The Dynamics Of Galactic Globular Cluster

摘要：

We have used the Hubble Space Telescope (HST) to measure proper motion of the globular cluster NGC 6656 (M22) with respect to the background bulge stars and its internal velocity dispersion profile. With the space velocity of (Π,Θ,W) = (184±3,209±14,132±15)kms-1,we also calculate the orbit of the cluster. The central velocity dispersion in both components of the proper motion of cluster stars is 16.99 km s-1. We derive the mass-to-ration (M/L)～1.7 which is relatively higher than the past works.

关键词： astrometry globular clusters:general

作者: Chen Ding

作者单位: National Time Service Center,Chinese Academy of Science,Xian 710600,China

会议类型: 国际会议

会议名称: The 252th Symposium of the International Astronomical Union(国际天文学联合会第252届研讨会)

会议地点: 海南三亚

会议语种:英文

页码: 269-270

在线出版日期: 2008-04-06（万方平台首次上网日期，不代表论文的发表时间）