We consider the background of a rotating axially symmetric black hole. Let particle 0 decay
to two fragments 1 and 2 in the direction parallel to that of particle 0. It is shown that if decay …

In this study, we explore the properties of a non-rotating black hole in the Einstein-Maxwell-
scalar (EMS) theory and investigate the luminosity of the accretion disk surrounding it. We …

In this paper, the Penrose process is used to extract rotational energy from regular black
holes. Initially, we consider the rotating Simpson–Visser regular spacetime, which describes …

In this paper, we study the magnetic reconnection process of energy extraction from a
rapidly rotating Kerr-Newman-MOG black hole by investigating the combined effect of black …

It is well established that the magnetic Penrose process (MPP) could be highly efficient
(efficiency can even exceed 100%) for extracting the energy from a Kerr black hole, if it is …

We consider the Penrose process with the charged particles in the Reissner-Nordström
background. Let parent particle 0 decay to particles 1 and 2. With the assumption that all …

In this paper, we investigate the optical properties of a charged black hole in Einstein-
Maxwell-scalar (EMS) theory. We evaluate the shadow cast by the black hole and obtain …

It is well known that the electrically charged Reissner–Nordström black hole could be
overcharged. Here, we investigate the process of overcharging of a magnetized Reissner …

Here we investigate the energetics of the charged-rotating-NUT-Kiselev black hole (CRNK-
BH) in the Rastall modified theory of gravity. First, we study the dependence of the …

Relying on the Penrose process mechanism, we study the possibility of energy extraction
from a binary system composed of two extreme electrostatic black holes (BHs) oppositely …