Massive heartbeat stars from TESS

Context. Heartbeat stars are eccentric binaries that exhibit a characteristic shape of brightness changes close to the periastron passage, primarily caused by variable tidal distortion components. Variable potential can drive tidally excited oscillations (TEOs), which usually gravity modes. Studies heartbeat and TEOs open up new possibilities for probing interiors massive stars. There only few (masses components ≳2 M ⊙ ) systems this type known thus far. Aims. Using TESS data from first 16 sectors, we searched using sample over 300 spectroscopic binaries. Methods. We analysed 2 min 30 cadence data. Then fitted Kumar’s analytical model light curves showing heartbeats performed times-series analysis residuals searching periodic intrinsic variability. Results. found 20 systems, 7 TEOs. The occur at harmonics orbital frequencies in range between 3 36, with median value equal 9, is lower than those Kepler most system quadruple star HD 5980, member Small Magellanic Cloud. With total mass ∼150 it heartbeat. Six eclipsing. A comparison parameters derived fitting light-curve modelling shows does not provide reliable parameters. In other words, be reliably if includes all proximity effects. Finally, pulsations β Cep, SPB, δ Sct, γ Dor-type were nine systems. This opens an interesting possibility studies pulsation-binarity interaction co-existence forced self-excited oscillations.