In this article, we provide a review of the current state of the research of the black hole
shadow, focusing on analytical (as opposed to numerical and observational) studies. We …

Abstract The Galactic Center (GC) of the Milky Way, thanks to its proximity, allows to perform
astronomical observations that investigate physical phenomena at the edge of astrophysics …

We study the shadow cast or silhouette generated by a Kerr-Newman-Kasuya (KNK)
spacetime (rotating dyon black hole). It is shown that in addition to the angular momentum of …

The shadow of a rotating non-Kerr black hole has been studied, and it was shown that in
addition to the specific angular momentum a, the deformation parameter of non-Kerr …

Using an algebraic condition of vanishing discriminant for multiple roots of fourth-degree
polynomials, we derive an analytical expression of a shadow size as a function of a charge …

In this paper, we use a new asymptotically flat and spherically symmetric solution in the
generalized Einstein–Cartan–Kibble–Sciama (ECKS) theory of gravity to study the weak …

In this article, we present an overview of the new developments in problems of the plasma
influence on the effects of gravitational lensing, complemented by pieces of new material …

In this paper, we obtain a new spherically symmetric black hole surrounded by the pseudo-
isothermal dark matter halo. Furthermore, to explore the effects of the pseudo-isothermal …

The center of our Galaxy hosts the best constrained supermassive black hole in the
universe, Sagittarius A*(Sgr A*). Its mass and distance have been accurately determined …

We construct the light escape cones of isotropic spot sources of radiation residing in special
classes of reference frames in the Kerr–de Sitter (KdS) black hole spacetimes, namely in the …