Cascades of shocks in Active Galactic Nuclei and their radiation

Abstract

We discuss accretion flows on massive black holes in which different elements of the flow (clumps) have velocities that may differ substantially. We estimate the consequence of collisions between these clumps as they come close to the central object and calculate the resulting radiation. We show that this radiation is similar to that observed in the optical to X-ray spectral domain in Seyfert galaxies and quasars. We also show that the large scale accretion is likely to be clumpy when arriving in the active region and that the clumps keep their identity between collisions.

arXiv commentAccepted in A+A, 8 pages, 2 figures

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• Reverberation Measurements for 17 Quasars and the Size-Mass-Luminosity Relations in Active Galactic Nuclei
• Central Masses and Broad-Line Region Sizes of Active Galactic Nuclei. II. A Homogeneous Analysis of a Large Reverberation-Mapping Database
• A Model for the X-Ray and UV Emission from Seyfert Galaxies and Galactic Black Holes
• QSO variability: probing the Starburst model
• Simultaneous observations of the quasar 3C 273 with INTEGRAL, XMM-Newton and RXTE
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• Kinematic signatures of reverberation mapping of close binaries of supermassive black holes in active galactic nuclei III. The case of elliptical orbits
• Multifractality Signatures in Quasars Time Series. I. 3C 273
• X-ray variability time scales in Active Galactic Nuclei
• Multi-Zone warm and cold clumpy absorbers in 3 Seyfert galaxies
• The efficient low-mass Seyfert MCG-05-23-016
• Connecting MeerKAT radio continuum properties to GAMA optical emission-line and WISE mid-infrared activity