Survey for {\delta} Sct components in eclipsing binaries and new correlations between pulsation frequency and fundamental stellar characteristics

摘要

CCD observations of 68 eclipsing binary systems, candidates for containing{\delta} Scuti components, were obtained. Their light curves are analysed usingthe PERIOD04 software for possible pulsational behaviour. For the systems QYAql, CZ Aqr, TY Cap, WY Cet, UW Cyg, HL Dra, HZ Dra, AU Lac, CL Lyn and IO UMa,complete light curves were observed due to the detection of a pulsatingcomponent. All of them, except QY Aql and IO UMa, are analysed with modernastronomical softwares in order to determine their geometrical and pulsationalcharacteristics. Spectroscopic observations of WY Cet and UW Cyg were used toestimate the spectral class of their primary components, while for HZ Draradial velocities of its primary were measured. O - C diagram analysis wasperformed for the cases showing peculiar orbital period variations, namely CZAqr, TY Cap, WY Cet and UW Cyg, with the aim of obtaining a comprehensivepicture of these systems. An updated catalogue of 74 close binaries including a{\delta} Scuti companion is presented. Moreover, a connection between orbitaland pulsation periods, as well as a correlation between evolutionary status anddominant pulsation frequency for these systems, is discussed.