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Photometric detection of internal gravity waves in early-type stars observed by CoRoT

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arxiv 1811.12930 v1 pith:UKJ3CKDV submitted 2018-11-30 astro-ph.SR

classification astro-ph.SR
keywords starsearly-typeigwslow-frequencyphotometricstochasticvariabilitycorot
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Early-type stars are predicted to excite an entire spectrum of internal gravity waves (IGWs) at the interface of their convective cores and radiative envelopes. Numerical simulations of IGWs predict stochastic low-frequency variability in photometric observations, yet the detection of IGWs in early-type stars has been limited by a dearth of high-quality photometric time series. We present observational evidence of stochastic low-frequency variability in the CoRoT photometry of a sample of O, B, A and F stars. The presence of this stochastic low-frequency variability in stars across the upper main-sequence cannot be universally explained as granulation or stellar winds, but its morphology is found to be consistent with predictions from IGW simulations.

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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. Stochastic low-frequency variability of 50 massive stars in the Cygnus OB associations and the Small Magellanic Cloud

    astro-ph.SR 2025-04 accept novelty 6.0 of 10

    Flickering in massive stars correlates with luminosity and matches sub-surface convection predictions, supporting that mechanism over internal waves or winds.

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