来自ASAS, OGLE, HATNet, AST3和TESS数据库的61个全食接触双星的光度研究。

IF 0.4 4区物理与天体物理 Q4 ASTRONOMY & ASTROPHYSICS

Contributions of the Astronomical Observatory Skalnate Pleso Pub Date : 2020-04-06 DOI:10.31577/caosp.2020.50.2.436

J. Rukmini, D. S. Priya, M. R. Prasad, P. R. Raja

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引用次数: 1

摘要

接触双星形成了一类有趣的双星，它们不仅通过引力束缚的周期紧密轨道表现出相互作用，而且通过质量传递、角动量损失和由于三级分量和磁活动的存在而引起的轨道调制表现出动态相互作用。它们是重要的距离指示器和研究恒星演化模型的实验室。目前的工作重点是我们对来自ASAS, OGLE, HATNet, AST3和TESS数据库的61个完全食接触双星的光度研究。物理参数由PHOEBE导出。所选双星周期短(0.34-0.97 d)，质量比低(0.076-0.504)，光谱类型为F5-M0，填充因子范围宽(3-85%)。根据获得的填充系数，5个为浅/边缘接触，41个为过接触，15个为深接触二元体。并将其绝对参数与经过充分研究的双星进行了比较。讨论了可能的进化状态。

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Photometric study of 61 totally eclipsing contact binaries from the ASAS, OGLE, HATNet, AST3 and TESS databases.

Contact binaries form an interesting class of binaries which not only show mutual interactions through gravitationally bound periodic close orbits, but also dynamical interactions through mass transfer, angular momentum loss and modulation of their orbits due to the presence of tertiary components and magnetic activity. They are important as distance indicators and laboratories to study stellar evolutionary models. The current work highlights our photometric study of 61 totally eclipsing contact binaries from the ASAS, OGLE, HATNet, AST3 and TESS databases. Physical parameters are derived using PHOEBE. The selected binaries fall in a range of short periods (0.34-0.97 d), low mass ratios (0.076-0.504), F5-M0 spectral types, and a wide range of fillout factors (3-85%). Based on obtained fillout factors, 5 were classified as shallow/marginal contact, 41 as over-contact and 15 as deep-contact binaries. The absolute parameters are compared with those of well-studied binaries. Possible evolutionary states are discussed.

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来源期刊

Contributions of the Astronomical Observatory Skalnate Pleso 地学天文-天文与天体物理

CiteScore

1.10

自引率

20.00%

发文量

审稿时长

>12 weeks

期刊介绍： Contributions of the Astronomical Observatory Skalnate Pleso" (CAOSP) is published by the Astronomical Institute of the Slovak Academy of Sciences (SAS). The journal publishes new results of astronomical and astrophysical research, preferentially covering the fields of Interplanetary Matter, Stellar Astrophysics and Solar Physics. We publish regular papers, expert comments and review contributions.