Census of Variable Stars toward Serpens Main
Census of Variable Stars toward Serpens Main
复制标题
巨蛇主岛变星普查
DOI：
10.3847/1538-3881/abfdcd
复制
发表时间：
2021
期刊：
影响因子：
--
通讯作者：
Yao Li
中科院分区：
文献类型：
--
作者：
Jia Yin;Zhiwei Chen;Rolf Chini;Martin Haas;Sadegh Noroozi;Yongqiang Yao;Zhibo Jiang;Xuan Qian;Li-Yong Liu;Yao Li
从2016年4月到9月，我们在Pan-STARRS 1 r，i和z波段监测了一个3 deg 2的区域。每个波段获得了11，000多颗恒星的光变曲线，并确定了143个变星。其中119个变量是新发现的，24个变量是以前已知的。我们目前的变化类和99颗恒星的周期。其中，81颗位于上巨分支，显示长周期，而其余18颗变星是短周期的前主序星。我们还确定了八个食双星系统，包括已知的二进制V0623 Ser，并推导出它们的物理参数。根据对观测场中盖亚DR 2恒星的聚类分析，巨蛇座主星系中有10个可变成员，其中6个成员在以前的研究中被归类为年轻恒星。在这里，我们提供了这些变量的颜色-量值和颜色-颜色图。颜色-星等图中大多数变量的颜色变化产生了预期的位移，而星团成员的运动指向不同的方向;这种行为可能与吸积斑或拱星盘有关。
We monitored a 3 deg2 area toward Serpens Main in the Pan-STARRS1 r, i, and z bands from 2016 April to September. Light curves of more than 11,000 stars in each band were obtained, and 143 variables have been identified. Among those, 119 variables are new discoveries, while 24 variables were previously known. We present variability classes and periods of 99 stars. Of these, 81 are located in the upper giant branch, displaying long periods, while the remaining 18 variables are pre-main-sequence objects with short periods. We also identify eight eclipsing binary systems, including the known binary V0623 Ser, and derive their physical parameters. According to a clustering analysis of Gaia DR2 stars in the observed field, there are 10 variable members in Serpens Main, where six members have been classified as young stellar objects in previous studies. Here we provide color–magnitude and color–color diagrams for these variables. The color variability of most variables in the color–magnitude diagrams produces the expected displacements, while the movements of cluster members point in different directions; this behavior may be associated with accretion spots or circumstellar disks.