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Line Emission from Accretion Disks in Active Galactic Nuclei

Published online by Cambridge University Press:  07 August 2017

S. Collin-Souffrin
Institut d'Astrophysique, 98bis Bld Arago, 75014 Paris, France
A.M. Dumont
DAEC, Observatoire de Paris, Section de Meudon, 92195 Meudon Principal cedex, France


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If accretion disks are present in AGN and extend to large radii they should contribute substantially to the Broad Line emission. The outer regions of the disk are indeed illuminated by a small amount of ionizing radiation. X-rays are emitted by the central inner region near the black hole, and they are either received directly by the outer disk, owing to its “flaring” shape (Cunningham, 1976), or partly reflected towards the disk by a hot Compton thin medium (Begelmann and McKee, 1983). X-ray photons are also produced through the Inverse Compton mechanism in compact radio sources located above the disk(“jet model”).

Part 4: Black Holes, Accretion Disks and Gravitational Lenses
Copyright © Kluwer 1989 


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