论文标题
LMC的162个偏移二进制的162个偏移二进制的首次APSidal运动和光曲线分析
First apsidal motion and light curve analysis of 162 eccentric eclipsing binaries from LMC
论文作者
论文摘要
我们对位于LMC星系中的162个早期型二元系统进行了广泛的研究，该系统显示出Apsidal运动，并且从未研究过。对于足够的系统，我们首次进行了光曲线和APSidal运动建模。这些系统的中位轨道周期为2.2天，典型的APSidal运动时期被得出数十年的顺序。我们确定了两个破纪录的系统。第一个是OGLE LMC-ECL-22613，显示了具有主序列成分的系统中最短的已知APSidal运动周期（6.6岁）；它包含轨道周期为23年的第三个成分。第二个OGLE LMC-ECL-17226是一个偏心系统，已知轨道周期最短（0.9879天），并且具有相当快的Apsidal运动期（11年）。在研究的系统中，根据其他时期变化确定了36个新的三星级候选者。这代表了所有研究系统的20％以上，这与我们银河系中倍数的统计数据一致。但是，由于我们的检测方法，数据覆盖范围和叶虫的各个时间精确度有限，因此仅应将分数视为LMC中这些早期型恒星的下限。
We present an extensive study of 162 early-type binary systems located in the LMC galaxy that show apsidal motion and have never been studied before. For the ample systems, we performed light curve and apsidal motion modelling for the first time. These systems have a median orbital period of 2.2 days and typical periods of the apsidal motion were derived to be of the order of decades. We identified two record-breaking systems. The first, OGLE LMC-ECL-22613, shows the shortest known apsidal motion period among systems with main sequence components (6.6 years); it contains a third component with an orbital period of 23 years. The second, OGLE LMC-ECL-17226, is an eccentric system with the shortest known orbital period (0.9879 days) and with quite fast apsidal motion period (11 years). Among the studied systems, 36 new triple-star candidates were identified based on the additional period variations. This represents more than 20% of all studied systems, which is in agreement with the statistics of multiples in our Galaxy. However, the fraction should only be considered as a lower limit of these early-type stars in the LMC because of our method of detection, data coverage, and limited precision of individual times of eclipses.
