Variable stars in the 50BiN open cluster survey. III. NGC 884

IF 1.8 4区物理与天体物理 Q3 ASTRONOMY & ASTROPHYSICS

Research in Astronomy and Astrophysics Pub Date : 2023-12-05 DOI:10.1088/1674-4527/ad12a7

Lin-Hong Wang, Qian-Heng Nie, Kun Wang, Xiaodian Chen, Chunguang Zhang, Licai Deng, Xiaobin Zhang, Tian-Lu Chen

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Abstract

Open clusters are the basic building blocks that serve as an the laboratory for the study of young stellar populations in the Milky Way. Variable stars in open clusters provide a unique way to accurately probe the internal structure, temporal and dynamical evolutionary stages of individual stars and the host cluster. The most powerful tool for such studies is time-domain photometric observations. This paper follows the route of our previous work, concentrating on a photometric search for variable stars in NGC 884. The target cluster is the companion of NGC 869, forming the well-known double cluster system that is gravitationally bound. From the observation run in November 2016, a total of 9247 B-band CCD images and 8218 V-band CCD images were obtained. We detected a total of 15 stars with variability in visual brightness, including 5 Be stars, 3 eclipsing binaries, and 7 of unknown type. Two new variable stars were discovered in this work. We also compared the variable star content of NGC 884 with its companion NGC 869.

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50BiN 开放星团巡天中的变星。III.NGC 884

疏散星团是研究银河系年轻恒星群的实验室的基本组成部分。疏散星团中的变星为精确探测单个恒星和主星团的内部结构、时间和动态演化阶段提供了独特的方法。这类研究最有力的工具是时域光度观测。这篇论文遵循了我们之前工作的路线，集中在NGC 884中变星的光度搜索上。目标星团是NGC 869的伴星，形成了著名的双星团系统，被引力束缚。在2016年11月的观测运行中，共获得b波段CCD图像9247张，v波段CCD图像8218张。我们一共发现了15颗视觉亮度变化的恒星，包括5颗Be星，3颗食双星和7颗未知类型的恒星。在这项工作中发现了两颗新的变星。我们还比较了NGC 884和它的伴星NGC 869的变星含量。

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来源期刊

Research in Astronomy and Astrophysics 地学天文-天文与天体物理

CiteScore

3.20

自引率

16.70%

发文量

2599

审稿时长

6.0 months

期刊介绍： Research in Astronomy and Astrophysics (RAA) is an international journal publishing original research papers and reviews across all branches of astronomy and astrophysics, with a particular interest in the following topics: -large-scale structure of universe formation and evolution of galaxies- high-energy and cataclysmic processes in astrophysics- formation and evolution of stars- astrogeodynamics- solar magnetic activity and heliogeospace environments- dynamics of celestial bodies in the solar system and artificial bodies- space observation and exploration- new astronomical techniques and methods