Particle dynamics around a dyonic charged black hole

Abstract

In this article, we study the circular motion of particles and the well-known Penrose mechanism around a Kerr-Newman-Kasuya black hole spacetime. The inner and outer horizons, as well as ergosurfaces of the said black hole, are briefly examined under the effect of spin and dyonic charge. Moreover, by limiting our exploration to the equatorial plane, we discuss the characteristics of circular geodesics and investigate both photons, as well as marginally stable circular orbits. It is noted that black hole charge diminishing the radii of photon and marginally stable circular orbits. To investigate the nature of particle dynamics, we studied the effective potential and Lyapunov exponent. While inspecting the process of energy extraction, we derived the Wald inequality, which can help us to locate the energy limits of the Penrose process. Furthermore, we have found expressions for the negative energy states and the efficiency of energy extraction. The obtained result illustrates that both black hole rotation and dyonic charge contributes to the efficiency of energy extraction.

Shadow cast and center of mass energy in a charged Gauss-Bonnet-AdS black hole

“…After the discovery of Einstein's General relativity theory [1], black holes (BHs) investigations caught a considerable interest of many researchers [2,3,4,5,6]. This theory explains how gravitational field affects the relation of time and space, as well as how quickly could an observer observed change in an object.…”

Geodesics and optical properties of rotating black hole in Randall-Sundrum brane with a cosmological constant

“…It is concluded that the Randall-Sundrum braneworld spacetimes can be stable against perturbations [18]. Recently, Khan et al [?,20] examined the motion of geodesics in the background of braneworld Kerr and a dyonic charged spacetimes, while Deng explored the periodic orbits near a braneworld BH under the influence of tidal charge [21].…”