Geometrically thick equilibrium tori around a dyonic black hole with quasi-topological electromagnetism

TL;DR

This paper investigates the structure and properties of thick, equilibrium tori orbiting a dyonic black hole influenced by quasi-topological electromagnetism, revealing complex behaviors including double tori configurations and transitions.

Contribution

It introduces a detailed analysis of equilibrium tori around dyonic black holes with quasi-topological electromagnetism, highlighting the effects of electric and magnetic charges and new torus configurations.

Findings

Existence of double tori solutions under certain parameters

Transitions between single and double tori with changing angular momentum

Rich properties of equilibrium tori influenced by charges and coupling parameters

Abstract

We study geometrically thick and non-self gravitating equilibrium tori orbiting a static spherically symmetric dyonic black hole with quasi-topological electromagnetism. Our results show that the electric and magnetic charges together with the coupling parameter in the quasi-topological electromagnetism lead to a much richer class of equilibrium tori. There are a range of parameters which allow for the existence of double tori. The properties of double equilibrium tori become far richer. There exist transitions between single torus and double tori solutions as we change the specific angular momentum of the fluid. These properties of equilibrium tori could help to understand the dyonic black hole and its thick accretion disk.