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- W3100654071 abstract "Heartbeat stars are a class of eccentric binary stars with short-period orbits and characteristic heartbeat signals in their light curves at periastron, caused primarily by tidal distortion. In many heartbeat stars, tidally excited oscillations can be observed throughout the orbit, with frequencies at exact integer multiples of the orbital frequency. Here, we characterize the tidally excited oscillations in the heartbeat stars KIC 6117415, KIC 11494130, and KIC 5790807. Using Kepler light curves and radial velocity measurements, we first model the heartbeat stars using the binary modeling software ELLC, including gravity darkening, limb darkening, Doppler boosting, and reflection. We then conduct a frequency analysis to determine the amplitudes and frequencies of the tidally excited oscillations. Finally, we apply tidal theories to stellar structure models of each system to determine whether chance resonances can be responsible for the observed tidally excited oscillations, or whether a resonance locking process is at work. We find that resonance locking is likely occurring in KIC 11494130, but not in KIC 6117415 or KIC 5790807." @default.
- W3100654071 created "2020-11-23" @default.
- W3100654071 creator A5054586239 @default.
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- W3100654071 date "2020-11-09" @default.
- W3100654071 modified "2023-10-16" @default.
- W3100654071 title "Detailed Characterization of Heartbeat Stars and Their Tidally Excited Oscillations" @default.
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- W3100654071 doi "https://doi.org/10.3847/1538-4357/abb46d" @default.
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