Membership Determination of Open Cluster M48 Based on BATC Thirteen-Band Photometry

Abstract

Beijing-Arizona-Taiwan-Connecticut (BATC) multi-band photometric data in the field of open cluster M48 are used to determine its membership. By comparing observed spectral energy distributions (SEDs) of stars with theoretical ones, membership probabilities of 750 stars with limiting magnitude of 15.0 in BATC $c$ band (${\lambda }_{eff}=4194$ Å) are determined. 323 stars with membership probabilities higher than 30% are considered as candidate members of M48. Comparing membership probabilities of 229 common stars obtained by the present method and the proper-motion based methods, a 80% agreement among these methods is obtained.

arXiv comment27 pages,7figures, accepted for publication in PASP

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• BATC 15 Band Photometry of the Open Cluster NGC 188
• NGC 2548: clumpy spatial and kinematic structure in an intermediate-age galactic cluster
• Variable Stars in the Field of the Open Cluster NGC 2126