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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
发表期刊ASTROPHYSICAL JOURNAL
2009-02-20
卷号692期号:2页码:1678-1689
DOI10.1088/0004-637X/692/2/1678
产权排序第3完成单位
收录类别SCI
关键词Galaxies: Star Clusters Magellanic Clouds Methods: Statistical Stellar Dynamics
摘要We 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.
项目资助者German Research Foundation (Deutsche Forschungsgemeinschaft-DFG)(GO 1659/1-1) ; NASA(NAS 5-26555)
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN0004-637X
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WOS记录号WOS:000263674700054
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]LARGE-MAGELLANIC-CLOUD ; INITIAL MASS FUNCTION ; SPACE-TELESCOPE OBSERVATIONS ; SURFACE BRIGHTNESS PROFILES ; GLOBULAR-CLUSTER ; ADVANCED CAMERA ; YOUNG CLUSTERS ; STRUCTURAL PARAMETERS ; LUMINOSITY FUNCTIONS ; FORMATION HISTORY
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被引频次:9[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/9368
专题大样本恒星演化研究组
作者单位1.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
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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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