Constraints on two accretion disks centered on the equatorial plane of a Kerr SMBH

TL;DR

This paper investigates the conditions under which two accretion disks can coexist around a Kerr supermassive black hole, focusing on their rotation, formation stages, and the likelihood of simultaneous accretion.

Contribution

It provides a classification of possible double torus configurations around Kerr black holes based on spin and rotation, highlighting the rarity of simultaneous accretion.

Findings

Double accretion tori are rare and occur under specific conditions.

The relative rotation of tori affects their stability and accretion states.

Classification depends on the Kerr black hole's dimensionless spin.

Abstract

The possibility that two toroidal accretion configurations may be orbiting around a~super--massive Kerr black hole has been addressed. Such tori may be formed during different stages of the Kerr attractor accretion history. We consider the relative rotation of the tori and the corotation or counterrotation of a~single torus with respect to the Kerr attractor. We give classification of the couples of accreting and non--accreting tori in dependence on the Kerr black hole dimensionless spin. We demonstrate that only in few cases a~double accretion tori system may be formed under specific conditions.