标题： BQ Ari的第一条光曲线解和周期研究 显示英文标题

标题： The First Light Curve Solutions and Period Study of BQ Ari

摘要： 对W UMa型双星系统BQ Ari的光度观测进行了首次完整的分析，使用Wilson-Devinney代码确定其光度和几何元素。 这些结果表明，BQ Ari是一个接触式W UMa双星系统，光度质量比q=0.91，填满因子为34%。 我们计算出BQ Ari的距离为146.24\pm 15秒差距，这是根据系统的联合亮度得出的，与从Gaia视差得出的距离值（132.848\pm 1.574）在1个标准差范围内一致。 在本研究中，我们提出了BQ Ari的新线性星历，结合了我们的新中点食时间以及之前的观测数据。 我们首次完整分析了该系统的轨道周期行为，并利用OCFit代码中的遗传算法（GA）和蒙特卡洛马尔可夫链（MCMC）方法分析了O-C图。 我们应用两种方法来分析O-C图中的正弦趋势。 这可能表明由于光时效应（LiTE）引起的周期性变化，周期为4.60年，振幅为6.212分钟。 另一方面，正弦趋势可能表明该系统中存在磁活动。 磁活动的周期计算为4.16年，由磁活动引起的周期变化为DeltaP/P=4.36x(10)^(-7)。 结论是磁活动更可能是原因，而不是LiTE信号。 显示英文摘要

摘要： The first complete analysis of the photometric observation of the W UMa type binary system BQ Ari was performed using the Wilson-Devinney code to determine its photometric and geometric elements. These results show that BQ Ari is a contact W UMa binary system with a photometric mass ratio q = 0.91, and the fillout factor equal to 34 percent. We calculated the distance of BQ Ari to be 146.24 \pm 15 parsecs from the combined brightness of the system, which is in agreement with the distance value derived from the Gaia parallax (132.848 \pm 1.574) in one standard deviation. In this study, we suggested a new linear ephemeris for BQ Ari, combining our new mid-eclipse times and the previous observations. We present the first complete analysis of the system's orbital period behavior and analysis of the O-C diagram using the Genetic Algorithm (GA) and the Monte Carlo Markov Chain (MCMC) approaches in OCFit code. We applied two approaches to analyze the sinusoidal trend in the O-C diagram. This may suggest a periodic change caused by the Light-Time Effect (LiTE) effect with a period of 4.60 years and an amplitude of 6.212 minutes. On the other hand, the sinusoidal trend may indicate the existence of magnetic activity in this system. The period of magnetic activity was calculated to be 4.16 years and changes of period induced by magnetic activity obtained as DeltaP/P=4.36x(10)^(-7). It was concluded that magnetic activity is more likely to be the causal agent as opposed to the LITE signals.