We model the supermassive dark object M 8 7* as a Schwarzschild lens and study the
variations in tangential, radial, and total (the product of tangential and radial) magnifications …

We review the physical origins for possible visible images of the supermassive black hole
M87* in the galaxy M87 and SgrA* in the Milky Way Galaxy. The classical dark black hole …

This study investigates the effects of higher dimensions on the observable properties of
Schwarzschild-Tangherlini black holes, focusing on the photonsphere, shadow radius …

It is well known that general relativity is an effective theory of gravity at low energy scale, and
actually quantum effects cannot be ignored in the strong-field regime. As a strong …

We recently hypothesized that a distortion parameter exists such that its signed sum for all
images of singular gravitational lensing of a source vanishes identically [1]. We found a …

We recently hypothesized that a distortion parameter exists such that its signed sum for all
images of singular gravitational lensing of a source vanishes identically [KS Virbhadra …

This study investigates the geodesic motion of test particles, both massless and massive,
within a Schwarzschild-Klinkhamer (SK) wormhole space-time. We specifically consider the …

With the observed data of the S2 orbit around the black hole Sgr A∗ and the Markov Chain
Monte Carlo method, we make a constraint on parameters of a disformal Schwarzschild …

The gravitational deflection of light is a critical test of modified theories of gravity. A few years
ago, Gibbons and Werner introduced a definition of the deflection angle based on the Gauss …

This paper is devoted to studying the observational signatures modified by Bardeen black
hole via shadow and strong lensing observations. Influence of the modified Bardeen black …