Accretion in active galactic nuclei and disk-jet coupling

Abstract

We review the current state of understanding how accretion onto a black hole proceeds and what are they key elements needed to form relativistic jets. Since the theoretical progress is severely halted by the lack of deep understanding of the microphysics involved, particularly in the presence of strong magnetic fields, all proposed solutions have a status of models, and their selection has to be based directly on observational constraints.

Review presented at the conference 5th Workshop on Compact Steep Spectrum and GHz-Peaked Spectrum Radio Sources, Rimini, comments welcome

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• The radio detection and accretion properties of the peculiar nuclear transient AT 2019avd
• Mid-Infrared Diagnostics of the Circumnuclear Environments of the Youngest Radio Galaxies
• Exploring the physics of the accretion and jet in nearby narrow-line Seyfert 1 galaxies
• Effect of matter geometry on low angular momentum black hole accretion in the Kerr metric
• A 2.5-dimensional viscous, resistive, advective magnetized accretion-outflow coupling in black hole systems: A higher order polynomial approximation. I
• Mapping the emission and spectral properties of the FRI radio galaxy 3C 449 with LOFAR and the VLA