Abstract

Aims. KIC 8975515 is a double-lined spectroscopic binary system with hybrid nature. Regular monitoring with the echelle spectrograph hermes show that both components have matching atmospheric properties (T-eff similar to 7400 K), and that one of them is a fast rotator (v sin i = 162 versus 32 km s(-1)). Our aim is to study the Kepler light curve in order to determine the frequencies of the pulsations, to search for regular spacing patterns in the Fourier spectrum, if any, and to discuss their origin in the context of binarity and fast rotation.