标题： 掩食双星中的R模式振荡 显示英文标题

标题： R-mode oscillations in eclipsing binaries

摘要： r模振荡（Rossby波与浮力耦合的全局模式）在食双星中的存在，在从开普勒光变曲线数据进行傅里叶分析得到的频率-振幅图中被识别为频率组。r模频率组上限附近的频率接近恒星的旋转频率。分析大约八百条食双星的开普勒光变曲线，发现了大约七百个显示出r模特征的案例。有时会发现两组频率群，这表明两个组成恒星具有略微不同的旋转频率。绘制由此获得的旋转频率相对于轨道频率，我们发现如果后者大于约1次/天，旋转大致与轨道频率同步，而在轨道周期较长的系统中，一些恒星的旋转频率高于轨道频率。 显示英文摘要

摘要： The presence of r mode oscillations (global modes of Rossby waves coupled with buoyancy) in an eclipsing binary is recognized as frequency groups in a frequency-amplitude diagram obtained from a Fourier analysis of Kepler light curve data. The frequency at the upper bound of an r-mode frequency group is close to the rotation frequency of the star. Analysing about eight hundred Kepler light curves of eclipsing binaries finds about seven hundred cases showing the signature of r modes. Sometimes two sets of the frequency groups are found, which indicates the two component stars to have slightly different rotation frequencies. Plotting thus obtained rotation frequencies with respect to orbital frequencies, we find that rotation is roughly synchronous to the orbital frequency if the latter is larger than about 1 c/d, while some stars rotate super-synchronously in systems with longer orbital periods.