Tidal Disruption Flares of Stars From Moderately Recoiled Black Holes
  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.
