论文标题
从R-Mode Signatures获得的开普勒偏心（心跳）二进制的恒星旋转率
Stellar rotation rates in Kepler eccentric (heartbeat) binaries obtained from r-mode signatures
论文作者
论文摘要
旋转恒星中的R模式振荡在与旋转频率相关的频率下以傅立叶振幅频谱产生特性特征，这又可以用于获得恒星的表面旋转速率。开普勒观察到的一些二进制恒星表明存在可能因潮汐效应而激发的R〜模式。在本文中，我们在具有R模式特征的20个偏心（心跳）二进制物中获得了恒星旋转周期。发现大多数旋转时期与伪同步时期相媲美，其中旋转的角速度与Periastron伴侣的角度轨道运动相似。特别是，对于具有轨道周期的心跳恒星的时间长于大约8 \，d，除了伪同步旋转外，所有的恒星都一致。与Zimmerman等人先前的研究相反，我们的结果支持Hut开发的伪同步理论。
R-mode oscillations in a rotating star produce characteristic signatures in a Fourier amplitude spectrum at frequencies related with the rotation frequency, which can be, in turn, used to obtain the surface rotation rate of the star. Some binary stars observed by Kepler indicate the presence of r~modes that are probably excited by the tidal effect. In this paper, we have obtained stellar rotation periods in 20 eccentric (heartbeat) binaries with r-mode signatures. The majority of the rotation periods are found to be comparable to pseudo-synchronous periods, in which the angular velocity of rotation is similar to the angular orbital motion of the companion at periastron. In particular, for the heartbeat stars with orbital periods longer than about 8\,d, all but one agree with pseudo-synchronous rotation. In contrast to a previous investigation by Zimmerman et al., our result supports the pseudo-synchronisation theory developed by Hut.
