In this study, we review some current studies on gravitational lensing for black holes, mainly
in the context of general relativity. We mainly focus on the analytical studies related to …

General relativity has been widely tested in weak gravitational fields but still stands largely
untested in the strong-field regime. According to the no-hair theorem, black holes in general …

We present novel methods implemented within the non-equilibrium Green function code
(NEGF) transiesta based on density functional theory (DFT). Our flexible, next-generation …

We investigate the equatorial deflection angle of light rays propagating in Kerr-Newman
black-bounce spacetime. Furthermore, we analyze the light ray trajectories and derive a …

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 …

We derive a stationary and axisymmetric black hole solution in Einstein-Dilaton-Gauss-
Bonnet gravity to quadratic order in the ratio of the spin angular momentum to the black hole …

Astrophysical black hole (BH) candidates are thought to be the Kerr BHs predicted by
general relativity, but the actual nature of these objects has still to be proven. The analysis of …

Astrophysical black hole candidates are thought to be the Kerr black holes predicted by
general relativity, but there is not yet clear evidence that the geometry of the space-time …

A charged black hole was predicted by the Einstein-Horndeski-Maxwell theory. In order to
provide its observational signatures, we investigate its weak and strong deflection …

Neutron stars (NS) s are astrophysical objects with strong gravitational and electromagnetic
fields. Since there are several effects on radiation processes around the star, it is impossible …