This work mainly focuses to unveil the optical features of a black hole. For this objective, we
utilize the metric-affine black hole geometry, including dilation, spin, and shear charge. The …

As is well-known, black hole plays an important role in probing the quantum effects of gravity
in the strong-field regime. In this paper, we focus on a polymerized black hole and …

The author of this article aims to review the theory of relativity and its implications for physics
education by using visual aids and a programming approach. The article will cover the …

In this work, we obtain an expression for the total observational frequency shift of photons
emitted by massive geodesic particles circularly orbiting a black hole in a general …

We extract the Hubble law by the frequency-shift considerations of test particles revolving
the Kerr black hole in asymptotically de Sitter spacetime. To this end, we take into account …

We are fitting dynamics of electrically neutral hot-spot orbiting around Sagittarius A*(Sgr A*)
source in Galactic center, represented by various modifications of the standard Kerr black …

In this paper, we employ a general relativistic formalism and develop new theoretical tools
that allow us to analytically express the mass and electric charge of the Reissner–Nordström …

In this work, we elaborate on the development of a general relativistic formalism that allows
one to analytically express the mass and spin parameters of the Kerr black hole in terms of …

Motivated by recent achievements of a full general relativistic method in estimating the mass-
to-distance ratio of supermassive black holes hosted at the core of active galactic nuclei, we …

The primary aim of this study is to investigate the characteristics of particle dynamics in black
holes with non-linear electrodynamics. To achieve this objective, we consider three non …