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A NEW DIAGNOSTIC METHOD FOR ASSESSMENT OF STELLAR STRATIFICATION IN STAR CLUSTERS
Gouliermis, Dimitrios A.1; De Grijs, Richard2,3; Xin Y(新宇)2,3,4
Source PublicationASTROPHYSICAL JOURNAL
2009-02-20
Volume692Issue:2Pages:1678-1689
DOI10.1088/0004-637X/692/2/1678
Contribution Rank第3完成单位
Indexed BySCI
KeywordGalaxies: Star Clusters Magellanic Clouds Methods: Statistical Stellar Dynamics
AbstractWe propose a new method for the characterization of stellar stratification in stellar systems. The method uses the mean-square radius ( also called the Spitzer radius) of the system as a diagnostic tool. An estimate of the observable counterpart of this radius for stars of different magnitude ranges is used as the effective radius of each stellar species in a star cluster. We explore the dependence of these radii on magnitude as a possible indication of stellar stratification. This method is the first of its kind to use a dynamically stable radius, and though seemingly trivial it has never been applied before. We test the proposed method using model star clusters, which are constructed to be segregated on the basis of a Monte Carlo technique, and on Hubble Space Telescope observations of mass-segregated star clusters in order to explore the limitations of the method in relation to actual data. We conclude that the method performs efficiently in the detection of stellar stratification and its results do not depend on the data, provided that incompleteness has been accurately measured and the contamination by the field population has been thoroughly removed. Our diagnosis method is also independent of any model or theoretical prediction, in contrast to the "classical" methods used so far for the detection of mass segregation.
Funding OrganizationGerman Research Foundation (Deutsche Forschungsgemeinschaft-DFG)(GO 1659/1-1) ; NASA(NAS 5-26555)
Language英语
Subject AreaAstronomy & Astrophysics
SubtypeArticle
ISSN0004-637X
URL查看原文
WOS IDWOS:000263674700054
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordLARGE-MAGELLANIC-CLOUD ; INITIAL MASS FUNCTION ; SPACE-TELESCOPE OBSERVATIONS ; SURFACE BRIGHTNESS PROFILES ; GLOBULAR-CLUSTER ; ADVANCED CAMERA ; YOUNG CLUSTERS ; STRUCTURAL PARAMETERS ; LUMINOSITY FUNCTIONS ; FORMATION HISTORY
Citation statistics
Cited Times:9[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/9368
Collection大样本恒星演化研究组
Affiliation1.Max-Planck-Institut f?r Astronomie, K?nigstuhl 17, D-69117 Heidelberg, Germany
2.Department of Physics & Astronomy, The University of Sheffield, Hicks Building, Hounsfield Road, Sheffield S3 7RH, UK
3.National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China
4.Yunnan Astronomical Observatory, Chinese Academy of Sciences, Kunming, Yunnan 650011, China
Recommended Citation
GB/T 7714
Gouliermis, Dimitrios A.,De Grijs, Richard,Xin Y. A NEW DIAGNOSTIC METHOD FOR ASSESSMENT OF STELLAR STRATIFICATION IN STAR CLUSTERS[J]. ASTROPHYSICAL JOURNAL,2009,692(2):1678-1689.
APA Gouliermis, Dimitrios A.,De Grijs, Richard,&新宇.(2009).A NEW DIAGNOSTIC METHOD FOR ASSESSMENT OF STELLAR STRATIFICATION IN STAR CLUSTERS.ASTROPHYSICAL JOURNAL,692(2),1678-1689.
MLA Gouliermis, Dimitrios A.,et al."A NEW DIAGNOSTIC METHOD FOR ASSESSMENT OF STELLAR STRATIFICATION IN STAR CLUSTERS".ASTROPHYSICAL JOURNAL 692.2(2009):1678-1689.
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