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首页> 外文期刊>PASJ: Publications of the Astronomical Society of Japan >1SWASP J075102.16+342405.3: A deep overcontact binary system with a period under the short period cut-off
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1SWASP J075102.16+342405.3: A deep overcontact binary system with a period under the short period cut-off

机译：1SWASP J075102.16 + 342405.3：具有短周期截止期的周期的深度过接触二进制系统

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摘要

New photometry of two different seasons for the extremely short period eclipsing binary 1SWASP J075102.16+342405.3 were performed. The two sets of derived light curves show a large difference in their shape, i.e., the 2013 light curves show big asymmetry, whereas the 2014 light curve is almost symmetric. All light curves were analysed using the 2013 version of the Wilson-Devinney (W-D) code. The obtained solutions show that 1SWASP J075102.16+342405.3 is of the A subtype WUMa contact system with an extremely high fill-out of f approximate to 96% and a high mass ratio of 0.70-0.78. Furthermore, a third light contributing to the total flux of the system was found. All these properties make the system a very special short-period source. The analysis of the 2013 light curves proved that the changes in the light curve shape are caused by magnetic activities. By means of all available times of minimum light, the variation of the orbital period was studied. It was found that the O-C diagram implies an increasing orbital period over a time span of eight years, which may be caused by the mass transfer from the less massive component to the more massive one; however, we are more inclined to say that it is only a part of a long period cyclic variation which can be explained by the light-travel time effect (LTTE) via the third body.
机译：针对极短周期的二元二进制1SWASP J075102.16 + 342405.3进行了两个不同季节的新测光。两组导出的光曲线在形状上存在很大差异，即2013年的光曲线显示出很大的不对称性，而2014年的光曲线几乎是对称的。使用2013版的Wilson-Devinney（W-D）代码对所有光曲线进行了分析。获得的解决方案表明1SWASP J075102.16 + 342405.3是A亚型WUMa接触系统，其f的极高填充率约为96％，质量比为0.70-0.78。此外，发现了有助于系统总通量的第三种光。所有这些属性使系统成为非常特殊的短期资源。 2013年光曲线的分析证明，光曲线形状的变化是由磁活动引起的。利用最小光的所有可用时间，研究了轨道周期的变化。结果发现，O-C图暗示了在八年时间内轨道周期的增加，这可能是由于质量从质量较小的部分转移到质量较大的部分所引起的。但是，我们更倾向于说这只是长时间周期变化的一部分，这可以通过通过第三物体的光程时间效应（LTTE）来解释。

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