Circular orbits and thin accretion disk around a quantum corrected black hole

TL;DR

This paper investigates the effects of quantum corrections on black hole shadows and accretion disk properties, providing observational bounds and analyzing how these corrections influence particle orbits and emitted radiation.

Contribution

It introduces a bound on the quantum correction parameter using Sgr A* data and explores its impact on accretion disk dynamics and radiation fluxes around black holes.

Findings

Correction parameter significantly affects particle angular momenta.

Innermost stable circular orbit radius increases with correction.

Radiative efficiency decreases as correction parameter grows.

Abstract

In this paper, we fist consider the shadow radius of a quantum corrected black hole proposed recently, and provide a bound on the correction parameter based on the observational data of Sgr A*. Then, the effects of the correction parameter on the energy, angular momenta and angular velocities of particles on circular orbits in the accretion disk are discussed. It is found that the correction parameter has significant effects on the angular momenta of particles on the circular orbits even in the far region from the black hole. It would be possible to identify the value of the correction parameter by the observations of the angular momenta of particles in the disk. It is also found that the radius of the innermost stable circular orbit increase with the increase of the correction parameter, while the radiative efficiency of the black hole decreases with the increase of the correction parameter. Finally, we consider how the correction parameter affect the emitted and observed radiation fluxes from a thin accretion disk around the black hole. Polynomial fitting functions are identified for the relations between the maxima of three typical radiation fluxes and the correction parameter.