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Amplitude and frequency modulation of super-Nyquist frequency from Kepler photometric sampling

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arxiv 2103.04713 v1 pith:WJOOOVKG submitted 2021-03-08 astro-ph.SR astro-ph.EPastro-ph.IM

Weikai Zong , Stéphane Charpinet This is my paper
classification astro-ph.SRastro-ph.EPastro-ph.IM
keywords frequencykeplermodulationstimeamplitudedataphotometricsuper-nyquist
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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.

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Cited by 1 Pith paper

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Re-examining Super-Nyquist Frequencies of 68 $\delta$ Scuti Stars Utilizing the Kepler Long Cadence Photometry

    astro-ph.SR 2025-07 conditional novelty 5.0 of 10

    Six frequencies in four delta Scuti stars are actually alias images of super-Nyquist signals, identified by re-analyzing Kepler long-cadence data with the sliding Lomb-Scargle periodogram.

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