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arXiv 2108.09629astro-ph.SR
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食双星KIC 9026766的首次研究:光变曲线和周期变化分析

First investigation of eclipsing binary KIC 9026766: analysis of light curve and periodic changes

Somaye Soomandar, Abbas Abedi

摘要:

摘要本文研究了在开普勒望远镜视场中的短周期WUMa双星KIC 9026766,其轨道周期为0.2721278天。通过使用折叠光变曲线的自动q搜索和基于PHOEBE代码产生该对象的合成光变曲线,我们计算了基本的恒星参数。我们还分析了原始极小值的O-C曲线。轨道周期的变化可以归因于向上的二次函数和光旅行时间效应的结合,这是由于可能存在最小质量为0.029太阳质量的第三个天体,轨道周期为972.5866天。计算了一、二次日食的相对光度(Min I Min II)。LTT效应和Min I Min II的残差的周期图显示峰值的相同周期为0.8566天。我们的目标附近的两颗恒星的背景效应可能是这个信号的原因。通过考虑最小OC曲线中剩余信号的幅度和周期,光点运动是可能的。

英文摘要:

Abstract We investigate a short-period W UMa binary KIC 9026766 with an orbital period of 0.2721278 days in the Kepler field of view. By using an automated q-search for the folded light curve and producing a synthetic light curve for this object based on the PHOEBE code, we calculate the fundamental stellar parameters. We also analyze the O-C curve of the primary minima. The orbital period changes can be attributed to the combination of an upward quadratic function and light-travel time effect due to a possible third body with a minimum mass of 0.029 solar mass and an orbital period of 972.5866 days. The relative luminosity of the primary and secondary eclipses (Min I Min II) is calculated. The periodogram of the residuals of the LTT effect, and Min I Min II show peaks with the same period of 0.8566 days. The background effect of two nearby stars on our target is the possible reason for this signal. By considering the amplitudes and periods of the remaining signals in the OC curve of minima, spot motion is possible.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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