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The study of pulsating stars in eclipsing binaries holds the promise ofcombining two different ways of measuring the physical properties of a star toobtain improved constraints on stellar theory. Gravity (g) mode pulsations suchas those found in $\gamma$ Doradus stars can be used to probe rotationalprofiles, mixing and magnetic fields. Until recently few $\gamma$ Doradus starsin eclipsing binaries were known. We have discovered g-mode pulsations in fourdetached eclipsing binary systems from light curves obtained by the TransitingExoplanet Survey Satellite (TESS) and present an analysis of their eclipses andpulsational characteristics. We find unresolved g-mode pulsations atfrequencies 1--1.5 d$^{-1}$ in CM Lac, and measure the masses and radii of thecomponent stars from the TESS data and published radial velocities. MZ Lacshows a much richer frequency spectrum, including pressure modes andtidally-excited g-modes. RX Dra is in the northern continuous viewing zone ofTESS so has a light curve covering a full year, but shows relatively fewpulsation frequencies. For V2077 Cyg we formally measure four pulsationfrequencies, but the available data are inadequate to properly resolve theg-mode pulsations. V2077 Cyg also shows total eclipses, with which we obtainthe first measurement of the surface gravity of the faint secondary star. Allfour systems are bright and good candidates for detailed study. Further TESSobservations are scheduled for all four systems, with much improved temporalbaselines in the cases of RX Dra and V2077 Cyg.

Four bright eclipsing binaries with gamma Doradus pulsating components: CM Lac, MZ Lac, RX Dra and V2077 Cyg