Dynamics of the globular cluster NGC 6656 with WFPC2

	Dynamics of the globular cluster NGC 6656 with WFPC2
	Chen, D; Chen, L; Wang, JJ
刊名	CHINESE PHYSICS LETTERS
	2004-08-01
卷号	21 期号:8 页码:1673-1676
英文摘要	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 (Pi, Theta, W) = (184 +/- 3, 209 +/- 14, 132 +/- 15) km s(-1) and galactic orbit are also obtained. The central velocity dispersion in radial and tangential components of the internal motion of cluster stars is 16.99 km s(-1). We derive the mass-to-light ratio M/L-V similar to 3.3 +/- 0.2, which is relatively higher than the previous results.
学科主题	星系和宇宙学研究中心
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Physics, Multidisciplinary
研究领域[WOS]	Physics
关键词[WOS]	STAR-CLUSTERS ; VELOCITY DISPERSIONS ; PROPER-MOTION ; M22 ; GALAXY ; MASS ; HALO ; ABUNDANCES ; KINEMATICS ; SYSTEM
收录类别	SCI
语种	英语
WOS记录号	WOS:000223162500072
公开日期	2010-11-08
内容类型	期刊论文
源URL	[http://119.78.226.72//handle/331011/11992]
专题	上海天文台_星系宇宙学重点实验室
作者单位	Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China
推荐引用方式 GB/T 7714	Chen, D,Chen, L,Wang, JJ. Dynamics of the globular cluster NGC 6656 with WFPC2[J]. CHINESE PHYSICS LETTERS,2004,21(8):1673-1676.
APA	Chen, D,Chen, L,&Wang, JJ.(2004).Dynamics of the globular cluster NGC 6656 with WFPC2.CHINESE PHYSICS LETTERS,21(8),1673-1676.
MLA	Chen, D,et al."Dynamics of the globular cluster NGC 6656 with WFPC2".CHINESE PHYSICS LETTERS 21.8(2004):1673-1676.