We consider a simple spherical model consisting of a Schwarzschild black hole of mass M
and a dark matter of mass ΔM around it. The general formula for the radius of black-hole …

Wormholes are hypothetical topologically-non-trivial structures of spacetime. From the
theoretical point of view, the possibility of their existence is challenging but cannot be ruled …

In this paper, we study circular orbits, effective potential, and thin-accretion disk of a black
hole in symmergent gravity (SG) within the Novikov–Thorne model in a way including the …

In this paper, we investigate the effect of the Generalized Uncertainty Principle (GUP) in the
Casimir wormhole spacetime recently proposed by Garattini (Eur Phys JC 79: 951, 2019). In …

The relation between the black hole shadow and the black hole thermodynamics is
investigated. We find that the phase structure can be reflected by the shadow radius for the …

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 …

The prospect of identifying wormholes by investigating the shadows of wormholes constitute
a foremost source of insight into the evolution of compact objects and it is one of the …

Due to the acceleration of the black hole, circular orbits with a fixed radial coordinate and
fixed latitude coordinate for photons will deviate from the equatorial plane, and the property …

In the present article, models of traversable wormholes within the f (R, T) f(R,T) modified
gravity theory, where RR is the Ricci scalar and TT is the trace of the energy-momentum …

Investigations of shadows of astrophysical entities constitute a major source of insight into
the evolution of compact objects. Such effects depend on the nature of the compact object …