We present a simulation showing that super-Nyquist frequencies may have periodic amplitude and frequency modulations, even if actually stable, in time series sampled like the Kepler data. These modulations are caused by the barycentric time correction, which destroys the evenly spaced time measurements, making the Nyquist frequency variable over the spacecraft orbit around the Sun. These modulations can easily be identified in pulsating stars from Kepler's photometric data.

中文翻译：

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开普勒光度采样的超奈奎斯特频率的幅度和频率调制

我们提供了一个模拟结果，表明在像开普勒数据这样采样的时间序列中，即使实际上很稳定，超奈奎斯特频率也可能具有周期性的幅度和频率调制。这些调制是由重心时间校正引起的，该校正会破坏均匀间隔的时间测量值，从而使奈奎斯特频率在围绕太阳的航天器轨道上变化。这些调制很容易从开普勒的光度数据中识别出脉动的恒星。