Bibcode
                                    
                            Rappaport, S. A.; Kurtz, D. W.; Handler, G.; Jones, D.; Nelson, L. A.; Saio, H.; Fuller, J.; Holdsworth, D. L.; Vanderburg, A.; Žák, J.; Skarka, M.; Aiken, J.; Maxted, P. F. L.; Stevens, D. J.; Feliz, D. L.; Kahraman Aliçavuş, F.
    Bibliographical reference
                                    Monthly Notices of the Royal Astronomical Society
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                        5
            
                        2021
            
  Citations
                                    31
                            Refereed citations
                                    26
                            Description
                                    We report the discovery of the third tidally tilted pulsator, TIC 63328020. Observations with the TESS satellite reveal binary eclipses with an orbital period of 1.1057 d, and δ Scuti-type pulsations with a mode frequency of 21.09533 d-1. This pulsation exhibits a septuplet of orbital sidelobes as well as a harmonic quintuplet. Using the oblique pulsator model, the primary oscillation is identified as a sectoral dipole mode with l = 1, |m| = 1. We find the pulsating star to have $M_1 \simeq 2.5 \, {\rm M}_\odot$ , $R_1 \simeq 3 \, {\rm R}_\odot$ , and Teff, 1 ≃ 8000 K, while the secondary has $M_2 \simeq 1.1 \, {\rm M}_\odot$ , $R_2 \simeq 2 \, {\rm R}_\odot$ , and Teff, 2 ≃ 5600 K. Both stars appear to be close to filling their respective Roche lobes. The properties of this binary as well as the tidally tilted pulsations differ from the previous two tidally tilted pulsators, HD74423 and CO Cam, in important ways. We also study the prior history of this system with binary evolution models and conclude that extensive mass transfer has occurred from the current secondary to the primary.
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            Jorge
            
                        García Rojas