Chin. Phys. Lett.  2004, Vol. 21 Issue (8): 1673-1676    DOI:
Original Articles |
Dynamics of the Globular Cluster NGC 6656 with WFPC2
CHEN Ding;CHEN Li;WANG Jia-Ji
Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai 200030
Cite this article:   
CHEN Ding, CHEN Li, WANG Jia-Ji 2004 Chin. Phys. Lett. 21 1673-1676
Download: PDF(350KB)  
Export: BibTeX | EndNote | Reference Manager | ProCite | RefWorks
Abstract We have used the Hubble Space Telescope observations to measure proper motion of the globular cluster NGC 6656 (M22) with respect to the background bulge stars and its internal velocity dispersion profile. Based on the proper motion of the cluster, its space velocity (II,,W) = (184±3,209±14, 132±15)kms-1 and galactic orbit are also obtained. The central velocity dispersion in radial and tangential components of the internal motion of cluster stars is 16.99kms-1. We derive the mass-to-light ratio M/Lv~3.3±0.2, which is relatively higher than the previous results.
Keywords: 98.20.-d      98.20.+z      98.20.Jp     
Published: 01 August 2004
PACS:  98.20.-d (Stellar clusters and associations)  
  98.20.+z  
  98.20.Jp (Globular clusters in external galaxies)  
TRENDMD:   
URL:  
https://cpl.iphy.ac.cn/       OR      https://cpl.iphy.ac.cn/Y2004/V21/I8/01673
Service
E-mail this article
E-mail Alert
RSS
Articles by authors
CHEN Ding
CHEN Li
WANG Jia-Ji
Related articles from Frontiers Journals
[1] LIU Xiao-Liang, HUANG Yong-Qing, LIU Nian-Hua, LAI Zhen-Quan, SHU Cheng-Gang,. Stellar Mass Function of Lyman Break Galaxies: Theoretical Perspective[J]. Chin. Phys. Lett., 2006, 23(4): 1673-1676
[2] WU Zhen-Yu, ZHOU Xu, MA Jun. Orbital Phase Dependence of Globular Cluster’s Tidal Radii[J]. Chin. Phys. Lett., 2004, 21(2): 1673-1676
[3] WU Zhen-Yu, SHU Cheng-Gang, CHEN Wen-Ping. Dynamical Evolution of Globular Clusters in the Galaxy[J]. Chin. Phys. Lett., 2003, 20(9): 1673-1676
[4] MAO Xin-Jie. Temperature Rise at the Edges of Dark Molecular Clouds[J]. Chin. Phys. Lett., 2000, 17(1): 1673-1676
[5] MAO Xin-jie, QIU Hong-mei, WANG Yu-chun. Outflows of Massive Stars in Cluster[J]. Chin. Phys. Lett., 1998, 15(4): 1673-1676
Viewed
Full text


Abstract