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 …

Horizon-scale images of black holes (BHs) and their shadows have opened an
unprecedented window onto tests of gravity and fundamental physics in the strong-field …

Searching for violations of the no-hair theorem (NHT) is a powerful way to test gravity, and
more generally fundamental physics, particularly with regards to the existence of additional …

In this paper the deflection angle of light by a rotating Teo wormhole spacetime is calculated
in the weak limit approximation. We mainly focus on the weak deflection angle by revealing …

We study shadows cast by a certain class of rotating wormholes and point out the crucial
role of a rotating wormhole throat in the formation of a shadow. Overlooking this crucial role …

In this paper, using the recent method proposed by Ono, Ishihara and Asada (OIA) who
extend the idea of Gibbons and Werner to the stationary and axisymmetric case, we apply …

Wormholes are hypothetical topologically-non-trivial structures of spacetime. From the
theoretical point of view, the possibility of their existence is challenging but cannot be ruled …

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 …

In this paper, we have systematically discussed the existence of the spherically symmetric
wormhole solutions in the framework of f (Q, T) gravity under two interesting non …

We explore the structure of shadow for a Kerr-de Sitter black hole with a nonmagnetized,
pressureless plasma surrounding it. Specific plasma distributions are considered to …