疏散星团M11的研究:3.团星分布的两点相关函数分析

Studies of the Open Cluster M11: 3.Two-point Correlation Analyses of the Member Star Distribution

本文首次利用两点相关函数，对著名中年疏散星团M11团星的空间分布进行了讨论．结果表明，无论对全部成员星还是不同星等的成员星，它们的自相关和交叉相关函数都能很好地以幂律形式描述．不同星等成员星的自相关和交叉相关计算表明，M11已经历了一定的动力学弛豫，出现了质量的空间分层效应．

Two-point correlation analyses for the typical intermediate-age open cluster M11 are presented. It is concluded that correlation functions for all member stars and member stars with different magnitudes can all be well described by using power laws. We also find from the correlation analyses that there ekists some mass segregation in M11, which should be due to its dynamical evolution.