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STRUCTURAL PARAMETERS FOR GLOBULAR CLUSTERS IN M31
Wang, Song1,2,3; Ma, Jun1,3
2013-08-01
发表期刊ASTRONOMICAL JOURNAL
卷号146期号:2
摘要In this paper, we present surface brightness profiles for 79 globular clusters in M31, using images observed with the Hubble Space Telescope, some of which are from new observations. The structural and dynamical parameters are derived from fitting the profiles to several different models for the first time. The results show that in the majority of cases, King models fit the M31 clusters just as well as Wilson models and better than Sersic models. However, there are 11 clusters best fitted by Sersic models with the Sersic index n > 2, meaning that they have cuspy central density profiles. These clusters may be the well-known core-collapsed candidates. There is a bimodality in the size distribution of M31 clusters at large radii, which is different from their Galactic counterparts. In general, the properties of clusters in M31 and the Milky Way fall in the same regions of parameter spaces. The tight correlations of cluster properties indicate a "fundamental plane" for clusters, which reflects some universal physical conditions and processes operating at the epoch of cluster formation.
关键词Galaxies: Individual (M31) Galaxies: Star Clusters: General Galaxies: Stellar Content
DOI10.1088/0004-6256/146/2/20
收录类别SCI
语种英语
WOS记录号WOS:000321841100002
引用统计
文献类型期刊论文
条目标识符http://ir.bao.ac.cn/handle/114a11/8898
专题光学天文研究部
作者单位1.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100039, Peoples R China
3.Chinese Acad Sci, Natl Astron Observ, Key Lab Opt Astron, Beijing 100012, Peoples R China
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Wang, Song,Ma, Jun. STRUCTURAL PARAMETERS FOR GLOBULAR CLUSTERS IN M31[J]. ASTRONOMICAL JOURNAL,2013,146(2).
APA Wang, Song,&Ma, Jun.(2013).STRUCTURAL PARAMETERS FOR GLOBULAR CLUSTERS IN M31.ASTRONOMICAL JOURNAL,146(2).
MLA Wang, Song,et al."STRUCTURAL PARAMETERS FOR GLOBULAR CLUSTERS IN M31".ASTRONOMICAL JOURNAL 146.2(2013).
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