低质量食双星的可能伴星:V380 Dra、BX Tri和V642 Vir

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

Contributions of the Astronomical Observatory Skalnate Pleso Pub Date : 2020-03-01 DOI:10.31577/caosp.2020.50.2.637

M. Wolf, H. Kučáková, P. Zasche, L. Šmelcer, K. Hornoch, K. Honkova, J. Juryšek, M. Mašek, M. Lehký

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引用次数: 1

摘要

我们提出了分析低质量食双星轨道周期变化的长期观测项目的新结果。用CCD记录了200多个新的精确的月食中期时间，它们是三个轨道周期短的食双星:V380 Dra (P = 0;49)， BX Tri(0。19)， V642 Vir(0。52)。利用所有可靠的时间对恒星的观测减去计算图进行了分析，并获得了光时效应的新参数。我们首次推导出这些天体可能的第三个天体的短轨道周期为10-20年。我们计算出第三组分的最小质量接近0.2 M，对应于M4 - M5红矮星的质量。这些系统的多样性在精确确定其物理参数方面也起着重要作用。

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Possible companions in low-mass eclipsing binaries: V380 Dra, BX Tri, and V642 Vir

We present the new results of our long-term observational project to analyze the orbital period variations of low-mass eclipsing binaries. More then 200 new precise mid-eclipse times recorded with a CCD were obtained for three eclipsing binaries with short orbital periods: V380 Dra (P = 0. 49), BX Tri (0. 19), and V642 Vir (0. 52). Observed-minus-calculated diagrams of the stars were analyzed using all reliable timings, and new parameters of the light-time effect were obtained. We derived for the first time the short orbital periods of possible third bodies of 10–20 years for these objects. We calculated that the minimum masses of the third component are close to 0.2 M , which corresponds to the mass of M4 – M5 red dwarfs. The multiplicity of these systems also plays an important role in the precise determination of their physical parameters.

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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.