Variable stars in the field of open cluster NGC 2126

作     者：Shun-Fang Liu Zhen-Yu Wu Xiao-Bin Zhang Jiang-Hua Wu Jun Ma Zhao-Ji Jiang Jian-Sheng Chen Xu Zhou 

作者机构：National Astronomical Observatories Chinese Academy of Sciences Beijing 100012 China Graduate University of Chinese Academy of Sciences Beijing 100049 China 

出 版 物：《Research in Astronomy and Astrophysics》 (天文和天体物理学研究（英文版）)

年 卷 期：2009年第9卷第7期

页      面：791-802页

核心收录：

学科分类：0709[理学-地质学] 07[理学] 0708[理学-地球物理学] 0704[理学-天文学] 0825[工学-航空宇航科学与技术] 

基　　金：supported by the National Natural Science Foundation of China through Grant Nos. 10873016, 10803007, 10473012, 10573020, 10633020, 10673012, 10603006, 10773015 and 10778720 the National Basic Research Program of China (973 Program) No. 2007CB815403 the Knowledge Innovation Program of Chinese Academy of Sciences 

主　　题：open clusters: individual (NGC 2126)   stars: variables (general)   bina  ties: general 

摘      要：We report the results of a time-series CCD photometric survey of variable stars in the field of open cluster NGC 2126. In about a one square degree field covering the cluster, a total of 21 variable candidates are detected during this survey, of which 16 are newly found. The periods, classifications and spectral types of 14 newly discovered variables are discussed, which consist of six eclipsing binary systems, three pulsating variable stars, three long period variables, one RS CVn star, and one W UMa or δ Scuff star. In addition, there are two variable candidates, the properties of which cannot be determined. By a method based on fitting observed spectral energy distributions of stars with theoretical ones, the membership probabilities and the fundamental parameters of this cluster are determined. As a result, five variables are probably members of NGC 2126. The fundamental parameters of this cluster are determined as： metallicity to be 0.008 Z, age log（t） = 8.95, distance modulus （m - M）0 = 10.34 and reddening value E（B - V） = 0.55 mag.