In this work, we performed a systematic study of the Symmergent gravity (SG) in a black hole
(BH) environment. Being an emergent gravity model in which gravity emerges to restore the …

In this work we have used for the first time pseudo-spectral methods to perform numerical
simulations of spherically symmetric black hole formations on a Friedman–Robertson …

We simulate numerically the formation of spherically symmetric primordial black holes
(PBHs) seeded by different families of primordial curvature perturbations profiles in a …

We investigate the effect of the cosmological constant on the angular size of a black hole
shadow. It is known that the accelerated expansion which is created by the cosmological …

We revisit the formation of primordial black holes (PBHs) in the radiation-dominated era for
both linear and non-linear regimes, elaborating on the concept of an apparent horizon …

We present the particle creation probability rate around a general black hole as an outcome
of quantum fluctuations. Using the uncertainty principle for these fluctuation, we derive a …

We investigate the geodesics of a Schwarzschild spacetime embedded in an isotropic
expanding cosmological background (McVittie metric). We focus on bound particle …

The model is constructed to describe the Schwarzschild-like black hole enclosed in the dust
cosmological background. It is an exact solution of Einstein equations for spherically …

The cosmological black holes are black holes living not in an asymptotically flat universe but
in an expanding spacetime. They have a rich dynamics especially for their mass and …

Primordial black holes are analytically and numerically discussed based on the extended
McVittie spacetime solution. By assuming that dark matter and radiation are the only sources …