Evidence for a steeper SMBH-Bulge mass relationship extended to low masses using TDE host galaxies

Abstract

Tidal disruption events (TDEs) are excellent tools for probing low mass supermassive black holes (SMBHs) that may otherwise remain undetected. Here, we present an extended SMBH--Bulge mass scaling relationship using these lower mass TDE black holes and their host galaxies. Bulge masses are derived using Prospector fits to UV-MIR spectral energy distributions for the hosts of 40 TDEs that have a detected late-time UV/optical plateau emission, from which a SMBH mass is derived. Overall, we find that TDE plateaus are a successful method for probing BH scaling relations. We combine the observed TDE sample with a higher mass SMBH sample and extend the known relationship, recovering a steeper slope ($m=1.34\pm 0.03$) than current literature estimates, which focus on the high mass regime. For the TDE only sample, we measure an equally significant but shallower relationship with a power-law slope of $m=1.17\pm 0.10$ and significance $<0.001$. Forward modelling is used to determine whether known selection effects can explain both the comparatively flatter TDE only relation and the overall steepening across the full SMBH mass range. We find that the flattening at TDE masses can be accounted for, however the steepening can not. It appears that if a single slope extends for the whole BH mass range, it must be steeper to include the TDE population.

13 pages, 7 figures

References in corpus (12)

• The propagation of uncertainties in stellar population synthesis modeling I: The relevance of uncertain aspects of stellar evolution and the IMF to the derived physical properties of galaxies
• The unWISE Catalog: Two Billion Infrared Sources from Five Years of WISE Imaging
• The Structure of Classical Bulges And Pseudobulges: The Link Between Pseudobulges And Sersic Index
• The black hole mass -- stellar velocity dispersion correlation: bulges versus pseudobulges
• Improved Dynamical Constraints on the Masses of the Central Black Holes in Nearby Low-mass Early-type Galactic Nuclei And the First Black Hole Determination for NGC 205
• On the mass and luminosity functions of tidal disruption flares: rate suppression due to black hole event horizons
• ProFit: Bayesian Profile Fitting of Galaxy Images
• Black hole masses of tidal disruption event host galaxies II
• The spectral evolution of disc dominated tidal disruption events
• Fundamental scaling relationships revealed in the optical light curves of tidal disruption events
• Black Hole Mass and Bulge Luminosity for Low-mass Black Holes
• Six new supermassive black hole mass determinations from adaptive-optics assisted SINFONI observations

Cited by in corpus (3)

• MUSE IFU observations of galaxies hosting Tidal Disruption Events
• Tidal disruption event rates across cosmic time: forecasts for LSST, Roman, and JWST and their constraints on the supermassive black hole mass function
• Prospects for Measuring Black Hole Masses using TDEs with the Vera C. Rubin Observatory