Period investigation of two RS CVn-type binary stars: RU Cancri and AW Herculis
Period investigation of two RS CVn-type binary stars: RU Cancri and AW Herculis
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DOI：
10.1007/s10509-008-9975-4
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发表时间：
2009-01
影响因子：
1.9
通讯作者：
Yongpo Tian;F. Xiang;Xia Tao
中科院分区：
文献类型：
--
作者：
Yongpo Tian;F. Xiang;Xia Tao
分析了两颗RS CVn型双星RU Cnc和AW Her的所有可用光极小值时间，给出了它们的轨道周期变化。发现RU-CNC星的轨道周期存在两种可能的周期振荡，周期分别为13.38(±0.23)年和37.6(±3.4)年。相应的振荡幅度约为0.0098(±0.0023)天和0.0119(±0.0017)天。AW HER的周期变化呈周期性变化，周期为12.79年(±0.34年)，波幅约为0.0327(±0.0063)天。由于RU-CnC和AW-HER是两个RS-CVN型系统，周期振荡更有可能是由磁活动周期引起的。
Orbital period variations of two RS CVn-type binaries, RU Cnc and AW Her, are presented based on the analysis of all available times of light minima. It is discovered that the orbital period of RU Cnc shows two possible period oscillations with periods of 13.38(±0.23) and 37.6(±3.4) years. The corresponding amplitudes of the oscillations are about 0.0098(±0.0023) and 0.0119(±0.0017) days. For AW Her, it is found that the period shows a cyclic variation with a period of 12.79(±0.34) years and an amplitude of about 0.0327(±0.0063) days. Since RU Cnc and AW Her are two RS CVn-type systems, the cyclic period oscillations are more likely to be caused by the magnetic activity cycles.