银河系中F型球状星团的空间分布及运动特征  

Space and Velocity Distribution of F Spectral Type Globula Clusters in the Galaxy

作　　者：王龙[1] 周洪楠[1] 

机构地区：[1]南京师范大学物理科学与技术学院,南京210097

出　　处：《南京师大学报（自然科学版）》2001年第2期31-36,共6页Journal of Nanjing Normal University(Natural Science Edition)

基　　金：江苏省教育委员会基金(1999WLX0 0 0SJ2 )

摘　　要：选择了 2 9个银河系中累积光谱型为F型的球状星团作为讨论样本 ,分析了它们在银心银道坐标系中的空间分布特征和运动速度特征 ,发现它们大多分布在银心距 10kpc范围之内 ,相对于银心呈空间球对称分布 ,而在速度空间中具有明显的椭球分布特征 .此外 ,还采用了两种不同的引力势模型计算逃逸速度 ,并将其与球状星团的空间速度进行比较 ,进而讨论两种引力势模型下球状星团的稳定性 .As an old celestial system,globular cluster is of significance on the study of the structure and evolution of the Galaxy.We select a group of samples of 29 globular clusters in the Galaxy with spectral type F.The characteristic of their space and velocity distribution is analysed in the galactocentric coordinates.It is found that most of them concentrate at the distances less than 10*#kpc from the galactic center,and show a symmetrical distribution toward the galactic center.The ellipsoidal distribution is clearly showed in the space of velocity.Besides,two different galactic potential models are used to calculate the escape velocities.Comparing the escape velocities with the space velocities of globular clusters,the stability of potential models is discussed.

关 键 词：F型球状星团 空间分布 速度特征 银河系 运动特征 

分 类 号：P156[天文地球—天文学]