Investigation of contact binaries in the field of NGC 6811

被引：6

作者：

Li, Xu-Zhi ^{[1
,2
,3
,4
]}

Liu, Liang ^{[1
,2
,3
,4
]}

Zhang, Xu-Dong ^{[1
,2
,3
,4
]}

机构：

[1] Chinese Acad Sci, Yunnan Observ, POB 110, Kunming 650216, Yunnan, Peoples R China

[2] Chinese Acad Sci, Key Lab Struct & Evolut Celestial Objects, POB 110, Kunming 650216, Yunnan, Peoples R China

[3] Chinese Acad Sci, Ctr Astron Megasci, 20A Datun Rd, Beijing 100012, Peoples R China

[4] Univ Chinese Acad Sci, Yuquan Rd 19,Shijingshan Block, Beijing 100049, Peoples R China

来源：

PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN | 2020年 / 72卷 / 04期

关键词：

binaries: close; binaries: eclipsing; cluster: individual (NGC 6811); cluster: open cluster; PHOTOMETRIC ANALYSIS; ECLIPSING BINARY; LIGHT CURVES; EVOLUTION; SYSTEMS; PERIOD; STARS; MASS;

D O I：

10.1093/pasj/psaa046

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Contact binary systems are very important for studying physical processes such as strong interactions between stars, mass transfer, and stellar merger. Further, the members of an open cluster have the same age, metal abundance, and interstellar extinction conditions. Therefore, we can conduct a comparative study on the different binary systems of the same open cluster. NGC 6811 is an observed intermediate-aged, slightly reddened open cluster in the Kepler field of view; we conducted a corresponding study on the contact binary systems in this cluster. We analyzed six suspected targets and found a total of five EW-type binary systems within a field of 40 radius of the NGC 6811 cluster center. These targets were analyzed base on the Kepler data, and the corresponding system parameters were obtained by using the latest version of the Wilson-Devinney code. Further, we also used Gaia DR2 data and the cluster distance data to estimate the absolute parameters of these targets to determine whether they are members of the cluster. Finally, we determined that two targets (KIC 9470175 and KIC 9533706) are most likely cluster members; KIC 9957411 and KIC 9776718 are definitely not members of the cluster, just background stars.

引用

页数：8

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