Proper motions of open clusters based on the TYCHO2 Catalogue -: II.: Clusters farther than 1 kpc

被引:48
作者
Dias, WS [1 ]
Lépine, JRD [1 ]
Alessi, BS [1 ]
机构
[1] Univ Sao Paulo, Dept Astron, BR-01060970 Sao Paulo, Brazil
关键词
Galaxy : open clusters and association : general;
D O I
10.1051/0004-6361:20020417
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We determined the mean absolute proper motion of 94 open clusters situated farther than 1 kpc from the Sun. The results are derived from the stellar proper motion data given in the Tycho2 Catalogue. The mean proper motion of the clusters and membership probability of individual stars were obtained from the proper motion data by applying the statistical method proposed by Sanders (1971). The measurements made use of a large number of stars, usually several tens, for each cluster. The total number of stars investigated in the fields of the clusters is 4864 of which 2021 were considered members. For 55 clusters, this is the first determination of the proper motion.
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收藏
页码:168 / 171
页数:4
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