KIC~8975515: a fast-rotating ($\gamma$ Dor - $\delta$ Sct) hybrid star with Rossby modes and a slower $\delta$ Sct companion in a long-period orbit

A. Samadi-Ghadim, P. Lampens, D. M. Jassur +1

{KIC~8975515 is a \emph{Kepler} double-lined spectroscopic binary system with hybrid pulsations. Two components have similar atmospheric properties (T${}_{\mathrm{eff}}$ $\sim$ 7400~K), a…