Tidal Disruption Flares of Stars From Moderately Recoiled Black Holes
arXiv:1105.4966 · doi:10.1111/j.1365-2966.2012.20577.x
Abstract
We analyze stellar tidal disruption events as a possible observational signature of gravitational wave induced recoil of supermassive black holes. As a black hole wanders through its galaxy, it will tidally disrupt bound and unbound stars at rates potentially observable by upcoming optical transient surveys. To quantify these rates, we explore a broad range of host galaxy and black hole kick parameters. We find that emission from a transient accretion disk can produce ~1 event per year which LSST would identify as spatially offset, while super-Eddington tidal flares, if they exist, are likely to produce ~10 spatially offset events per year. A majority of tidal disruption flares, and a large majority of flares with an observable spatial offset, are due to bound rather than unbound stars. The total number of disruption events due to recoiled black holes could be almost 1% of the total stellar tidal disruption rate.
15 pages, 8 figures
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