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arXiv 2210.01464astro-ph.SR
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日食时间的可变性:金牛座V471的情况

Variability of eclipse timing:the case of V471 Tauri

Emil Kundra, Ľubomír Hambálek, Siegfried Vanaverbeke, Pavol Dubovský, Ludwig Logie, Steve Rau, Franky Dubois

摘要:

后共包络双星V471 Tauri几十年来一直是人们感兴趣的对象。V471 Tau由于其演化状态和独特的性质而表现出各种现象,例如其磁吸积和日食时间变化(ETV)。以前的作者解释了不同的,有时相互矛盾的理论ETV。在本文中,我们提出并分析了这颗星的食定时的变化。在过去的十年里,我们观测了V471 Tauri,并覆盖了其周期变化的第二个周期。根据我们对所提供的数据的分析,我们评估了在这个系统中可能存在的棕矮星,并得出其轨道参数。我们比较我们的动力学建模的结果,Applegate机制理论,这已经在最近的研究中开发的预测的解决方案。我们发现,所观察到的ETV不能解释只有额外的组件的存在下,以二进制。

英文摘要:

The post-common envelope binary V471 Tauri has been an object of interest for decades. V471 Tau shows various phenomena due to its evolutionary state and unique properties, e.g. its magnetic accretion and eclipse timing variation (ETV). Previous authors explained the ETVs by different, sometimes contradictory theories. In this paper, we present and analyse the variability of the eclipse timing of this star. We observed V471 Tauri over the last ten years and covered the second cycle of its period variation. Based on our analysis of the presented data, we assess the possible existence of a brown dwarf in this system and derive its orbital parameters. We compare the results of our dynamical modelling to the solution predicted by Applegate-mechanism theories, which have been developed in recent studies. We found that the observed ETV cannot be explained only by the presence of additional components to the binary.

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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