Constraining study of circular orbits and accretion disk around nonlinear electrodynamics black hole

TL;DR

This paper investigates the structure of geodesics and accretion disks around a nonlinear electrodynamics black hole, analyzing how parameters influence orbits and accretion rates in strong and weak gravitational fields.

Contribution

It provides new insights into circular orbits and accretion processes around nonlinear electrodynamics black holes, considering perturbations and parameter effects.

Findings

Parameter $eta$ significantly affects accretion rates.

Circular orbits depend on black hole parameters in both field regimes.

Mass accretion rate varies with $eta$ and $Q$ in strong and weak fields.

Abstract

The very latest observation of $M87$ supermassive black hole (BH) by the Event Horizon Telescope (EHT) provides the accretion onto BHs is an interesting study in the theory of gravity. We study the geodesics structure and accretion near a nonlinear electrodynamics BH in strong and weak field approximations. These approximations provide the disc-like structure under the geodesic motion and accretion around the BH. Near the equatorial plane, we provide some new reasons to make circular orbits and accretion of test particles around the BH. Then we investigate perturbations, the critical speed of the fluid and the mass accretion rate of particles around the central object. The physical validity of this study shows that the parameter $\beta$ and $Q$ play an important role in the circular orbits and the mass accretion rate in strong and weak field approximations.