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arXiv 2203.05098astro-ph.SR
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四个双食系统的首次研究

The first study of four doubly eclipsing systems

P. Zasche, Z. Henzl, J. Kara

摘要:

我们提出的发现和第一次分析的四个恒星系统显示两个时期的日食,这是被归类为双重食系统的对象。其中一些被证明是相互环绕的,这要归功于它们的食时变化(ETV),因此它们真正构成了罕见的四重双星。其中一些没有,因为我们仍在等待更多的数据来检测它们的相互运动。分析了它们的光变曲线和周期变化。它们都是分离的,接近接触的,但没有一颗接触;此外,据我们所知,这些恒星中没有一颗可以被认为是天空中两个空间上不可分辨的紧密成分的混合物。这些系统是CzeV 2647(0.5723296 + 0.9637074天),被证明以4.5年的周期运行; CzeV 1645(1.0944877 + 1.6594641天),ETV检测结果相当可疑; CzeV 3436(0.6836870 + 0.3833930天);最后,OGLE SMC-ECL-1758(0.9291925 + 3.7350826天)被证明在其30年的轨道上运行。更令人惊讶的是,这些系统中的大多数显示出它们的两个轨道周期的比率接近于小整数的一些共振值附近的耦合,即CzeV 2647,只有1%来自3:5共振,CzeV 1645 1%来自2:3共振,OGLE SMC-ECL-1758只有0.49%来自1:4共振。这些近共振态的性质仍然是一个谜。

英文摘要:

We present the discovery and the very first analysis of four stellar systems showing two periods of eclipses, that are the objects classified as doubly eclipsing systems. Some of them were proved to orbit each other thanks to their eclipse-timing-variations (ETVs) of both pairs, hence they really constitute rare quadruples with two eclipsing pairs. Some of them do not, as we are still waiting for more data to detect their mutual movement. Their light curves and period changes were analysed. All of them are detached and near-contact, but none of them contact; moreover, to our knowledge none of these stars can be considered as blend of two spatially unresolved close components on the sky. These systems are CzeV2647 (0.5723296 + 0.9637074 days), proved to orbit with 4.5-year periodicity; CzeV1645 (1.0944877 + 1.6594641 days), with a rather questionable detection of ETV; CzeV3436 (0.6836870 + 0.3833930 days); and, finally, OGLE SMC-ECL-1758 (0.9291925 + 3.7350826 days), proved to move on its 30-year orbit. Even more surprising is the fact that most of these systems show the ratio of their two orbital periods close to coupling near some resonant values of small integers, namely CzeV2647, with only 1% from 3:5 resonance, CzeV1645 1% from 2:3 resonance, and OGLE SMC-ECL-1758 with only 0.49% from 1:4 resonance. The nature of these near-resonant states still remains a mystery.

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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