U Gru displays a long series of pulsation modes offset from orbital harmonics, interpreted as tidally perturbed pressure modes in an Algol-type (oEA) binary.
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Discovery of tidally-perturbed pulsations in the eclipsing binary U Gru: a pioneering system for tidal asteroseismology
U Gru displays a long series of pulsation modes offset from orbital harmonics, interpreted as tidally perturbed pressure modes in an Algol-type (oEA) binary.