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arXiv 1603.01767astro-ph.SRastro-ph.GA
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基于UCAC4星表的15个疏散星团自行测定的改进

Improved proper motion determinations for 15 open clusters based on the UCAC4 catalog

Alexander Kurtenkov, Nadezhda Dimitrova, Alexander Atanasov, Teodor D. Aleksiev

摘要:

利用UCAC 4星表的数据重新计算了15个邻近(d < 1 kpc)疏散星团的自行。只有在星团中心一定半径范围内的进化星或主序星才被使用。结果与Dias等人(2014)提出的结果有显著差异。这可以用考虑场星污染的不同方法来解释。本工作的目的是强调应用光度判据计算疏散星团自行的重要性。

英文摘要:

The proper motions of 15 nearby (d < 1 kpc) open clusters were recalculated using data from the UCAC4 catalog. Only evolved or main sequence stars inside a certain radius from the center of the cluster were used. The results differ significantly from the ones presented by Dias et al. (2014). This could be explained by the different approach to taking the field star contamination into account. The present work aims to emphasize the importance of applying photometric criteria for the calculation of open cluster proper motions.

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