Photometric Analysis of the OGLE Heartbeat Stars

We present an analysis of 991 heartbeat stars (HBSs) from the OGLE Collection Variable Stars (OCVS). The sample consists 512 objects located toward Galactic bulge (GB), 439 in Large Magellanic Cloud (LMC) and 40 Small (SMC). model $I$-band light curves using analytical flux variations, reflecting tidal deformations between stars. distributions parameters that include eccentricity, orbital inclination, argument periastron, but also period-amplitude diagrams. On Hertzsprung-Russell (HR) diagram, our HBS forms two separate groups different evolutionary status. first group about 90 systems, with short periods ($P\lesssim50$~days), early-type primary star lying on (or close to) main sequence (MS). second 900 long ($P\gtrsim100$~days), contains a red giant (RG). position RG HBSs period-luminosity diagram strongly indicates their binary nature. They appear to be natural extension confirmed systems ellipsoidal Long Secondary Period (LSP) variables. time-series leading detection tidally-excited oscillations (TEOs). identify such pulsations 5\% total number 78 modes. This relatively large homogeneous TEOs allowed us construct revealing correlation TEO's harmonic eccentricity host system.