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 …

In this work, we propose the modeling of static wormholes within the f (R, T) extended theory
of gravity perspective. We present some models of wormholes, which are constructed from …

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 …

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 …

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 …

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 …

We study strong gravitational lensing by a class of static wormhole geometries. Analytical
approaches to the same are developed, and the results differ substantially from strong …

In this work, we calculate the deflection angle of light in a spacetime that interpolates
between regular black holes and traversable wormholes, depending on the free parameter …