As a result of various studies, it has been determined that several post-common envelope eclipsing binaries have variations in their orbital periods. These variations are thought to be caused by the existence of additional bodies in the system (hypothetical stars or planets) and/or other physical effects (such as angular momentum loss, magnetic activity) of the binary system. It is also known that the sdB+M eclipsing system NY Vir has shown such variations in the last decade, indicating additional objects and/or other physical effects. In this work, we present 51 new eclipse times for this system, which extend the time-span of it is O − C diagram by about 3 yr, obtained between 2015 and 2021 using two different telescopes in Turkey. The data obtained in the last 3 yr show a new trend in the O − C diagram differently from the predictions of the previous studies. Our model is consistent with the new O − C diagram, which is statistically well fitted with the quadratic term and the additional two planets with masses of M3 = 2.74 MJup and M4 = 5.59 MJup. However, the orbital period variation can also be related to magnetic activity. In order to better understand the mechanism causing the changes in the orbital period, new observation data are needed that will show at least one full cycle of the change in the O − C diagram.

中文翻译：

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对食双星系统 NY Vir 及其候选环绕双星的新观测

作为各种研究的结果，已经确定几个后共同包络食双星的轨道周期存在差异。这些变化被认为是由系统中存在额外的天体（假设的恒星或行星）和/或双星系统的其他物理效应（如角动量损失、磁活动）引起的。众所周知，sdB+M 食系统 NY Vir 在过去十年中表现出这种变化，表明存在额外的物体和/或其他物理效应。在这项工作中，我们为该系统展示了 51 个新的日食时间，这将其 O-C 图的时间跨度延长了约 3 年，这是在 2015 年至 2021 年期间使用土耳其的两台不同望远镜获得的。过去 3 年获得的数据显示 O - C 图中的新趋势与之前研究的预测不同。我们的模型与新的 O - C 图一致，该图在统计上很好地拟合了二次项和另外两颗质量分别为 M3 = 2.74 MJup 和 M4 = 5.59 MJup 的行星。然而，轨道周期变化也可能与磁活动有关。为了更好地理解引起轨道周期变化的机制，需要新的观测数据来显示 O-C 图中至少一个完整周期的变化。轨道周期变化也可能与磁活动有关。为了更好地理解引起轨道周期变化的机制，需要新的观测数据来显示 O-C 图中至少一个完整周期的变化。轨道周期变化也可能与磁活动有关。为了更好地理解引起轨道周期变化的机制，需要新的观测数据来显示 O-C 图中至少一个完整周期的变化。