Powerful Flares from Recoiling Black Holes in Quasars

Details Powerful Flares from Recoiling Black Holes in Quasars Powerful Flares from Recoiling Black Holes in Quasars

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...211.4527s&link_type=abstract

American Astronomical Society, AAS Meeting #211, #45.27; Bulletin of the American Astronomical Society, Vol. 39, p.800

Astronomy and Astrophysics

Astronomy

Scientific paper

Mergers of spinning black holes can give recoil velocities from gravitational radiation up to several thousand km/s. A recoiling supermassive black hole in an AGN can retain the inner part of its accretion disk. Marginally bound material falling back into the disk following the merger can release a large amount of energy in shocks in a short time, leading to a powerful flare in thermal soft X-rays. The primary X-rays will be largely or entirely absorbed by the infalling material, giving ultraviolet emission lines from photoionized gas. Despite the short lifetime of the flare (of order 1000 years), several flares may be observable at the present time in QSOs at redshifts 1 to 3. These flares may provide a means to identify high velocity recoils.

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