论文标题
对四个双重黯然失色系统的首次研究
The first study of four doubly eclipsing systems
论文作者
论文摘要
我们介绍了发现两个恒星系统的发现和首次分析，这些系统显示了两个时期的日食，它们是被归类为双重黯然失色系统的对象。由于两对的蚀及时变化（ETV），其中一些人被证明是彼此绕的，因此它们确实构成了两对脱落的稀有四倍体。他们中的一些人没有，因为我们仍在等待更多数据来检测它们的相互运动。分析了它们的光曲线和周期变化。它们都脱离且接近接触，但它们都没有接触。此外，据我们所知，这些恒星都不能被视为在天空上两个未解决的近距离组件的混合物。这些系统为CZEV2647（0.5723296 + 0.9637074天），被证明为4。5年的周期性； CZEV1645（1.0944877 + 1.6594641天），对ETV的发现相当可疑； CZEV3436（0.6836870 + 0.3833930天）;最后，事实证明，OGLE SMC-ECL-1758（0.9291925 + 3.7350826天）被证明在其30年的轨道上移动。更令人惊讶的是，这些系统中的大多数都显示了它们两个轨道时期的比率，接近耦合的一些偶联，即CZEV2647，即CZEV2647，仅1％，从3：5共振，CZEV1645，CZEV1645 1％1％1％，从2：3共振，ogle SMC-ECL-1758，与0.49％的reson reseance reshance ceson ance reshance czev1645 1％。这些近乎共鸣状态的性质仍然是一个谜。
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.
