The Pseudosynchronization of Binary Stars Undergoing Strong Tidal Interactions
The Pseudosynchronization of Binary Stars Undergoing Strong Tidal Interactions
复制标题
经历强潮汐相互作用的双星伪同步
DOI：
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发表时间：
2017
影响因子：
4.9
通讯作者：
K. Hambleton
中科院分区：
文献类型：
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作者：
M. Zimmerman;S. Thompson;F. Mullally;J. Fuller;Avi Shporer;K. Hambleton
被称为“心跳星”的偏心双星在经过近日点时会经历强烈的动态潮汐，这为研究潮汐相互作用提供了一个实验室。我们测量了24个心跳系统的旋转周期，使用开普勒光曲线来识别傅里叶变换中的旋转峰值。在可能的情况下，我们将旋转周期与Hut推导的伪同步周期进行比较。我们的心跳恒星很少与轨道周期伪同步。对于四个系统，我们能够识别出两组旋转峰值，我们将其解释为双星中的两颗恒星的旋转。在我们的样本中，大多数恒星的自转速率都大于伪同步周期，而单个目标的自转速度比这个速度快得多。大多数系统的旋转周期大约是伪同步周期的两倍，这表明其他物理机制强烈地影响了恒星的演化。
Eccentric binaries known as heartbeat stars experience strong dynamical tides as the stars pass through periastron, providing a laboratory to study tidal interactions. We measure the rotation periods of 24 heartbeat systems, using the Kepler light curves to identify rotation peaks in the Fourier transform. Where possible, we compare the rotation period to the pseudosynchronization period derived by Hut. Few of our heartbeat stars are pseudosynchronized with the orbital period. For four systems, we were able to identify two sets of rotation peaks, which we interpret as the rotation from both stars in the binary. Most stars in our sample have rotation rates larger than the pseudosynchronization period while a single target rotates much faster than this rate. The majority of the systems have a rotation period that is approximately times the pseudosynchronization period, suggesting that other physical mechanisms strongly influence the star’s evolution.