Publication date: May 2018
Abstract:
Ringed accretion disks (RADs) are agglomerations of perfect-fluid tori
orbiting around a single central attractor that could arise during
complex matter inflows in active galactic nuclei. We focus our analysis
to axi-symmetric accretion tori orbiting in the equatorial plane of a
supermassive Kerr black hole; equilibrium configurations, possible
instabilities, and evolutionary sequences of RADs were discussed in our
previous works. In the present work we discuss special instabilities
related to open equipotential surfaces governing the material funnels
emerging at various regions of the RADs, being located between two or
more individual toroidal configurations of the agglomerate. These open
structures could be associated to proto-jets. Boundary limiting surfaces
are highlighted, connecting the emergency of the jet-like instabilities
with the black hole dimensionless spin. These instabilities are
observationally significant for active galactic nuclei, being related to
outflows of matter in jets emerging from more than one torus of RADs
orbiting around supermassive black holes.
Authors:
Pugliese, D.; Stuchlík, Z.;