VARIABLE STARS IN THE 50BiN OPEN CLUSTER SURVEY. I. NGC 2301
VARIABLE STARS IN THE 50BiN OPEN CLUSTER SURVEY. I. NGC 2301
复制标题
50BiN 开放星团巡天中的变星。
DOI：
10.1088/0004-6256/150/5/161
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发表时间：
2015
影响因子：
5.3
通讯作者：
Luo Zhiquan
中科院分区：
文献类型：
--
作者：
Wang Kun;Deng Licai;Zhang Xiaobin;Xin Yu;Yan Zhengzhou;Tian Jianfeng;Luo Yangping;Luo Changqing;Zhang Chunguang;Peng Yingjiang;Pan Yang;Sun Jinjiang;Luo Zhiquan
目前的工作是50厘米望远镜网络的第一个贡献，其主要目标是系统地探测和描述银河系疏散星团中的变星。在本文中，我们报告了在疏散星团NGC 2301中寻找变星的结果。在星团周围20′ × 20′的视场内探测到18颗变星，包括12个新天体。利用光变曲线的行为、色星等图上的位置和存档的自行数据，讨论了其物理性质、分类和成员资格。在这12颗新天体中，有5颗是低振幅的盾牌座δ星，其中4颗可能是星团的成员。其中一颗被发现是一个食双星系统中的盾牌座δ星星。其中一个γ剑鱼座候选者被确认为星团成员，但显然非常靠近γ剑鱼座不稳定带的蓝色边缘，因此可以用来确定不稳定带的蓝色边缘。其余5颗新变星被归类为EW型食双星，轨道周期为0.5785天，另外4颗未知变星。此外，还根据观测结果给出了六个已知变量的修正基本数据。
The current work is the first contribution from the 50 cm Binocular Network, whose primary goal is to systematically detect and characterize variable stars in Galactic open clusters. In this paper, we report the results of a search for variables in the open cluster NGC 2301. Eighteen variable stars including 12 new objects were detected in a 20′ × 20′ field around the cluster. The physical properties, classifications, and memberships are discussed using the behaviors of the light curves, the positions on the color–magnitude diagram, and the archival proper-motion data. Among the 12 new objects, 5 are low-amplitude δ Scuti stars, 4 of which are probable members of the cluster. One of them is discovered to be a δ Scuti star in an eclipsing binary system. One γ Doradus candidate is identified as a cluster member, but is apparently located very close to the blue edge of the γ Doradus instability strip and therefore can be used to pin down the blue edge of the instability strip. The remaining five new variables are classified as an EW-type eclipsing binary with an orbital period of 0.5785 days and four unknown type variable stars. In addition, revised basic data for the six known variables are given according to our observations.