In this article, we provide a review of the current state of the research of the black hole
shadow, focusing on analytical (as opposed to numerical and observational) studies. We …

In recent years, unprecedented progress has been achieved regarding black holes'
observation through the electromagnetic channel. The images of the supermassive black …

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 …

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 …

Black-bounce to traversable wormhole Page 1 Journal of Cosmology and Astroparticle
Physics Black-bounce to traversable wormhole To cite this article: Alex Simpson and Matt …

In this paper, we construct an effective rotating loop quantum black hole (LQBH) solution,
starting from the spherical symmetric LQBH by applying the Newman-Janis algorithm …

Typical fluid particle trajectories are sensitive to changes in their initial conditions. This
makes the assessment of flow models and observations from individual tracer samples …

General Relativity has shown an outstanding observational success in the scales where it
has been directly tested. However, modifications have been intensively explored in the …

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 …

Recently, there has been a surge of interest in the 4D Einstein-Gauss-Bonnet (4D EGB)
gravity theory which bypasses the Lovelock theorem and avoids Ostrogradsky's instability …