Mimetic gravity is a Weyl‐symmetric extension of General Relativity, related to the latter by a
singular disformal transformation, wherein the appearance of a dust‐like perfect fluid can …

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 …

We investigate gravitational lensing by a primary photon sphere which is a sphere filled with
unstable circular light orbits, and by a secondary photon sphere on a wormhole throat in a …

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 …

A Simpson-Visser spacetime has two non-negative parameters a and m and its metric is
correspond with (i) a Schwarzschild metric for a= 0 and m≠ 0,(ii) a regular black hole metric …

We investigate retrolensing by two photon spheres in a novel black-bounce spacetime
suggested by Lobo et al. which can correspond to a Schwarzschild black hole, a regular …

Ultracompact objects (UCOs) are horizonless compact objects that present light rings (LRs):
circular photon orbits. As a result, they could be black hole mimickers. Some years ago …

In this paper, we investigate the effect of the Generalized Uncertainty Principle (GUP) in the
Casimir wormhole spacetime recently proposed by Garattini (Eur Phys JC 79: 951, 2019). In …

In the present work, we theoretically investigate gravitational lensing in the spacetime of a
holonomy corrected Schwarzschild black hole. Analytical expressions for the light deflection …