SIMBAD references

2020MNRAS.497.2276P - Mon. Not. R. Astron. Soc., 497, 2276-2285 (2020/September-2)

Enhancement of the tidal disruption event rate in galaxies with a nuclear star cluster: from dwarfs to ellipticals.

PFISTER H., VOLONTERI M., DAI J.L. and COLPI M.

Abstract (from CDS):

We compute the tidal disruption event (TDE) rate around local massive black holes (MBHs) with masses as low as 2.5×104M^, thus probing the dwarf regime for the first time. We select a sample of 37 galaxies for which we have the surface stellar density profile, a dynamical estimate of the mass of the MBH, and 6 of which, including our Milky Way, have a resolved nuclear star cluster (NSC). For the Milky Way, we find a total TDE rate of ∼10–4 yr–1 when taking the NSC in account, and ∼10–7 yr–1 otherwise. TDEs are mainly sourced from the NSC for light (<3×1010 M) galaxies, with a rate of few 10–5 yr–1, and an enhancement of up to two orders of magnitude compared to non-nucleated galaxies. We create a mock population of galaxies using different sets of scaling relations to explore trends with galaxy mass, taking into account the nucleated fraction of galaxies. Overall, we find a rate of few 10–5 yr–1 which drops when galaxies are more massive than 1011 M and contain MBHs swallowing stars whole and resulting in no observable TDE.

Abstract Copyright: © 2020 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): galaxies: bulges - galaxies: dwarf - galaxies: nuclei

Simbad objects: 45

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