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    Powerful Flares From Recoiling Black Holes In Quasars

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    2008_08_powerfulflares.pdf (300.2Kb)
    Date
    2008-08
    Author
    Shields, Gregory A.
    Bonning, E. W.
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    Abstract
    Mergers of spinning black holes can give recoil velocities from gravitational radiation up to several thousand km s(-1). A recoiling supermassive black hole in an AGN retains the inner part of its accretion disk. Marginally bound material rejoining the disk around the moving black hole releases a large amount of energy in shocks in a short time, leading to a flare in thermal soft X-rays with a luminosity approaching the Eddington limit. Reprocessing of the X-rays by the infalling material gives strong optical and ultraviolet emission lines with a distinctive spectrum. Despite the short lifetime of the flare (similar to 10(4) yr), as many as 10(2) flares may be in play at the present time in QSOs at redshifts similar to 1-3. These flares provide a means to identify high-velocity recoils.
    Department
    Astronomy
    Subject
    black hole physics
    galaxies : active
    quasars : general
    digital sky survey
    active galactic nuclei
    gravitational-radiation
    binaries
    coalescence
    spectra
    agn
    astronomy & astrophysics
    URI
    http://hdl.handle.net/2152/34733
    Citation
    Shields, Gregory A., and E. W. Bonning. "Powerful flares from recoiling black holes in quasars." The Astrophysical Journal, Vol. 682, No. 2 (Aug., 2008): 758.
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