| 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
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| 发表期刊 | ASTROPHYSICAL JOURNAL
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| 2009-02-20 | |
| 卷号 | 692期号:2页码:1678-1689 |
| DOI | 10.1088/0004-637X/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 |
| ISSN | 0004-637X |
| URL | 查看原文 |
| 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 |
| 引用统计 | |
| 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 |
| 推荐引用方式 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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| A NEW DIAGNOSTIC MET（5219KB） | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | 浏览 请求全文 | |
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