Kinematics of stars in the old open cluster M67

被引：0
|
作者：
A. V. Loktin
机构：
[1] Ural State University,Astronomical Observatory
来源：
Astronomy Reports | 2005年 / 49卷
关键词：
Kinetic Energy; Velocity Component; Tangential Component; Radial Component; Open Cluster;
D O I：
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中图分类号：
学科分类号：
摘要：
We report an analysis of the kinematic properties of stars in the old open cluster M67 based on proper motions taken from a master catalog made up of nine different catalogs containing proper motions of stars in the cluster field. A modified Sanders method is used to identify 511 probable cluster members. The dependence of the mean radial components of the proper motions of cluster members on clustercentric radius indicates that the cluster core is expanding with a velocity of 0.4 km/s. The radial dependence of the mean tangential components of the proper motions suggests the possible rotation of the cluster core. The dispersions of the velocity components of the cluster members show no evidence for the dominance of elongated stellar orbits in the cluster. The kinetic energy of the cluster stars depends strongly on their mass.
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页码：693 / 700
页数：7
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