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 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 …

The near future mm/sub-mm very long baseline interferometry experiments are ambitious
projects aiming at imaging the “shadow” of the supermassive black hole candidate at the …

We propose a new method of detecting Ellis wormholes by use of the images of wormholes
surrounded by optically thin dust. First, we derive steady solutions of dust and a more …

This study explores the wormhole solutions utilizing the notion of conformal symmetry in the
background of the f (τ, T) f(τ,T) gravity. The exact shape functions are calculated using the …

Gravitational lensing by the light sphere of compact objects like black holes and wormholes
will give us information on the compact objects. In this paper, we provide an improved strong …

Observations of gravitational lenses in strong gravitational fields give us a clue to
understanding dark compact objects. In this paper, we extend a method to obtain a …

In this paper, we study the deflection of light by a class of charged wormholes within the
context of the Einstein-Maxwell-dilaton theory. The primordial wormholes are predicted to …