Evidence of Resonant Mode Coupling in the Hot B Subdwarf Star KIC 10139564
CNRS, Université de Toulouse, UPS-OMP, IRAP, Toulouse 31400, France
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Published online: 23 September 2015
The Kepler spacecraft provides new opportinuties to observe long term frequency and amplitude modulations of oscillation modes in pulsating stars. We analyzed more than three years of uninterrupted data obtained with this instrument on the hot B subdwarf (sdB) star KIC 10139564 and found clear signatures of nonlinear resonant mode coupling affecting several multiplets. The observed periodic frequency and amplitude modulations may allow for new asteroseismic diagnostics, providing in particular ways to measure linear growth rates of pulsation modes in hot subdwarf stars for the first time.
© Owned by the authors, published by EDP Sciences, 2015
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