The Mass and Stellar Content of the Globular Cluster M13
The Mass and Stellar Content of the Globular Cluster M13
复制标题
球状星团 M13 的质量和恒星含量
DOI：
10.1086/116386
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发表时间：
1992
期刊：
影响因子：
--
通讯作者：
G. Fahlman
中科院分区：
文献类型：
--
作者：
P. Leonard;H. Richer;G. Fahlman
运动学信息已被用于求解Jeans方程，以提供球状星团m13的质量估计。由于该星团一直是固有运动和径向速度研究的主题，因此有可能比较基于两种数据得出的速度分散剖面的质量估计。我们发现固有运动提供了比径向速度更受约束的质量估计，这是由于需要两个独立的速度色散剖面来解球面Jeans方程的基本事实
Kinematical information has been used to solve the Jeans equation to provide mass estimates in the globular cluster M 13. Since the cluster has been the subject of both proper motion and radial velocity studies, it is possible to compare mass estimates based on velocity dispersion profiles derived from the two types of data. It is found that the proper motions provide a much more constrained mass estimate than do the radial velocities, which is due to the fundamental fact that two independent velocity dispersion profiles are required to solve the spherical Jeans equation