Perturbations of black holes, initially considered in the context of possible observations of
astrophysical effects, have been studied for the past 10 years in string theory, brane-world …

Quasinormal modes are eigenmodes of dissipative systems. Perturbations of classical
gravitational backgrounds involving black holes or branes naturally lead to quasinormal …

In this paper, we discuss the effects of nonlinear electrodynamics (NED) on non-rotating
black holes, parametrized by the field coupling parameter β and magnetic charge parameter …

Motivated by recent work on the Modified Maxwell (ModMax) black holes [Phys Lett B
10.1016/j. physletb. 2020.136011], which are invariant in duality rotations and conformal …

The links between the deformation parameter β of the generalized uncertainty principle
(GUP) to the two free parameters ω^ and γ of the running Newtonian coupling constant of …

The well-known correspondence between quasinormal modes of any stationary, spherically
symmetric and asymptotically flat or de Sitter black hole and parameters of the circular null …

Asymptotically safe gravity is based on the idea that the main contribution to the
Schwarzschild-like black hole spacetime is due to the value of the gravitational coupling …

The purpose of this article is twofold. First, we highlight a simple connection between the
real part of quasinormal modes (QNMs) in the eikonal limit and the shadow radius of black …

The Bardeen black hole holds historical significance as the first model of a regular black
hole. Recently, there have been proposed interpretations of the Bardeen spacetime as …

We show that perturbations of a scalar field in the background of the spherically symmetric
black hole obtained with the Starobinsky-Bel-Robinson Gravity are unstable unless the …