Accretion onto Some Well-Known Regular Black Holes

TL;DR

This paper investigates the process of matter accretion onto various well-known regular black holes, analyzing critical points and physical behaviors during accretion for different models.

Contribution

It provides a detailed analysis of accretion dynamics onto several specific regular black hole solutions, including charged and asymptotically flat models.

Findings

Critical radius and speed during accretion are derived.

Radial velocity and energy density behaviors are characterized.

Mass change rates for different black holes are analyzed.

Abstract

In this work, we discuss the accretion onto static spherical symmetric regular black holes for specific choices of equation of state parameter. The underlying regular black holes are charged regular black hole using Fermi-Dirac Distribution, logistic distribution, nonlinear electrodynamics, respectively and Kehagias-Sftesos asymptotically flat regular black hole. We obtain the critical radius, critical speed and squared sound speed during the accretion process near the regular black holes. We also study the behavior of radial velocity, energy density and rate of change of mass for each regular black holes.