Tidal Disruption Flares from Recoiling Supermassive Black Holes

Details Tidal Disruption Flares from Recoiling Supermassive Black Holes Tidal Disruption Flares from Recoiling Supermassive Black Holes

2008-07-01

arxiv.org/abs/0807.0223v1

Astrophys.J.683:L21-L24,2008

Astronomy and Astrophysics

Astrophysics

ApJ Letters, in press (2 figures, one in color)

Scientific paper

10.1086/591420

Supermassive black holes ejected from galaxy nuclei by gravitational wave recoil will carry a retinue of bound stars, even in the absence of an accretion disk. We discuss the observable signatures related to these stars, with an emphasis on electromagnetic flares from stars that are tidally disrupted by the black hole. We calculate disruption rates for the bound, and the unbound, stars. The rates are smaller than, but comparable to, rates for non-recoiling black holes. A key observational consequence is the existence of powerful off-nuclear and intergalactic X-ray flares. We also discuss other observable signatures associated with the bound stars, including episodic X-ray emission from accretion due to stellar mass loss; intergalactic supernovae; and feedback trails.

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