| Membership and Segregation Effects in the Young Open Cluster NGC 6530 |
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| 作者姓名： | Jun-Liang Zhao Li Chen and Wen Wen Shanghai Astronomical Observatory Chinese Academy of Sciences Shanghai Shanghai University Shanghai |
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| 作者单位： | Jun-Liang Zhao，Li Chen and Wen Wen Shanghai Astronomical Observatory，Chinese Academy of Sciences，Shanghai 200030; Shanghai University，Shanghai 200444 |
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| 基金项目： | 国家自然科学基金;国家自然科学基金;上海市科委资助项目 |
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| 摘 要： | From photographic plate data of Shanghai Astronomical Observatory with a time baseline of 87 years, proper motions and membership probabilities of 364 stars in the open cluster NGC 6530 region are reduced. On the basis of membership determination, luminosity function and segregation effect of the cluster are discussed with details. Spatial mass segregation is obviously present in NGC 6530 while there is no clear evidence for a velocity-mass (or velocity-luminosity) dependence. The observed spatial mass segregation for NGC 6530 might be due to a combination of initial conditions and relaxation process.
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| 关 键 词： | 天文现象 上海 照相天体测量学 发光度 |
Membership and Segregation Effects in the Young Open Cluster NGC 6530 |
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| Jun-Liang Zhao,Li Chen and Wen Wen Shanghai Astronomical Observatory,Chinese Academy of Sciences,Shanghai , Shanghai University,Shanghai .Membership and Segregation Effects in the Young Open Cluster NGC 6530[J].Chinese Journal of Astronomy and Astrophysics,2006,6(4):435-446. |
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| Authors: | Jun-Liang Zhao Li Chen Wen Wen |
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| Institution: | [1]Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai 200030 [2]Shanghai University, Shanghai 200444 |
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| Abstract: | From photographic plate data of Shanghai Astronomical Observatory with a time baseline of 87 years, proper motions and membership probabilities of 364 stars in the open cluster NGC 6530 region are reduced. On the basis of membership determination, luminosity function and segregation effect of the cluster are discussed with details. Spatial mass segregation is obviously present in NGC 6530 while there is no clear evidence for a velocity-mass (or velocity-luminosity) dependence. The observed spatial mass segregation for NGC 6530 might be due to a combination of initial conditions and relaxation process. |
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| Keywords: | open clusters and associations: individual (NGC 6530) |
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