2025AJ....170...93C

The Roman Space Telescope Galactic Bulge Time Domain Survey (GBTDS) is expected to detect ∼10⁵ transiting planets. Many of these planets will have short orbital periods and are thus susceptible to tidal decay. We use a catalog of simulated transiting planet detections to predict the yield of orbital decay detections in the Roman GBTDS. Assuming a constant stellar tidal dissipation factor, ${Q}_{* }^{{\prime} }$, of 10⁶, we predict ∼5-10 detections. We additionally consider an empirical period-dependent parameterization of ${Q}_{* }^{{\prime} }\propto {P}^{-3}$ and find a substantially suppressed yield. We conclude that Roman will provide constraints on the rate of planet engulfment in the Galaxy and probe the physics of tidal dissipation in stars.