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Tidal disruption events (TDEs) provide a means to probe the low end of thesupermassive black hole (SMBH) mass distribution, as they are only observablebelow the Hills mass ($\lesssim 10^8$ M$_\odot$). Here we attempt to calibratethe scaling of SMBH mass with host galaxy bulge mass, enabling SMBH masses tobe estimated for large TDE samples without the need for follow-up observationsor extrapolations of relations based on high-mass samples. We derive hostgalaxy masses using Prospector fits to the UV-MIR spectral energy distributionsfor the hosts of 29 well-observed TDEs with BH mass estimates from MOSFiT. Wethen conduct detailed bulge/disk decomposition using SDSS and PanSTARRSimaging, and provide a catalog of bulge masses. We measure a positivecorrelation between SMBH and bulge mass for the TDE sample, with a power-lawslope of 0.28 and significance $p=0.06$ (Spearmans) and $p=0.05$ (Pearsons),and an intrinsic scatter of 0.2 dex. Applying MC resampling and bootstrapping,we find a more conservative estimate of the slope is $0.18\pm0.11$, dominatedby the systematic errors from Prospector and MOSFiT. This is shallower than theslope at high SMBH mass, which may be due to a bias in the TDE sample towardslower mass BHs that can more easily disrupt low-mass stars outside of the eventhorizon. When combining the TDE sample with that of the high mass regime, wefind that TDEs are successful in extending the SMBH - stellar mass relationshipfurther down the mass spectrum and provide a relationship across the full rangeof SMBH masses.

The bulge masses of TDE host galaxies and their scaling with black hole mass