In this work, we wish to address the question—whether the quasinormal modes, the
characteristic frequencies associated with perturbed black hole spacetimes, central to the …

The so-called black-bounce mechanism of singularity suppression, proposed by Simpson
and Visser, consists of replacing the spherical radius r in the metric tensor with r 2+ a 2, a …

We study gravitational and test-field perturbations for the two possible families of spherically
symmetric black-hole mimickers that smoothly interpolate between regular black holes and …

We present a rotating regular black hole whose inner horizon has zero surface gravity for
any value of the spin parameter and is, therefore, stable against mass inflation. Our metric is …

In this paper, we will use the coincident gauge to investigate new solutions of the f (Q) theory
applied in the context of black holes, regular black holes, and the black-bounce spacetime …

Simpson and Visser recently proposed a phenomenological way to avoid some kinds of
space-time singularities by replacing a parameter whose zero value corresponds to a …

This study focuses on investigating a regular black hole within the framework of Verlinde's
emergent gravity. In particular, we explore the main aspects of the modified Simpson–Visser …

Gravitational decoupling can add hair to the black holes by adding extra sources. The
quasinormal modes of a hairy black hole caused by gravitational decoupling for the …

Eikonal quasinormal modes (QNMs) of black holes (BHs) and parameters of null geodesics,
ultimately tied to the appearance of BHs to external observers, are known to be related, and …

ABSTRACT The Event Horizon Telescope (EHT) has recently observed the image and
shadow of the supermassive compact object Sagittarius A*(Sgr A*). According to the EHT …