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Revised Rates of Stellar Disruption in Galactic Nuclei
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We compute rates of tidal disruption of stars by supermassive black holes in galactic nuclei, using downwardly-revised black hole masses from the M-sigma relation. In galaxies with steep nuclear density profiles, which dominate the overall event rate, the disruption frequency varies inversely with assumed black hole mass. We compute a total rate for non-dwarf galaxies that is about a factor ten higher than in earlier studies. Disruption rates are predicted to be highest in nucleated dwarf galaxies, assuming that such galaxies contain black holes. Monitoring of a rich galaxy cluster for a few years could rule out the existence of intermediate mass black holes in dwarf galaxies.
Forward citations
Cited by 3 Pith papers
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TDEs on FIRE: Illuminating the Cosmic Evolution of Tidal Disruption Rates
FIRE-2 simulations show per-galaxy tidal disruption rates peak near z=2.5 at 4e-4 per year, correlate with SFR and central density, and remain high in satellite galaxies at early times.
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Two Earliest Optical-UV Tidal Disruption Events Hidden in the SDSS DR7 Catalog Unveiled by the Transformer-Based Spectrum Classifier
PCA-Transformer spectrum classifier recovers two new optical-UV TDEs from SDSS DR7, including the earliest known with occurrence before MJD 52316.
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Dark Matter-Powered Stars and the High-Redshift Tidal Disruption Event Rate
Short-lived Population III stars suppress the high-redshift TDE rate, and dark matter annihilation near a particle mass of 1 MeV can revive the rate by extending stellar lifetimes.
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