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 …

Black hole solutions in general relativity come with pathologies such as singularity and mass
inflation instability, which are believed to be cured by a yet-to-be-found quantum theory of …

We consider the optical appearance under a thin accretion disk of a regular black hole with
a central de Sitter core implementing O (l 2/r 2) far corrections to the Schwarzschild black …

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 …

In this work, we present a non–general relativity full waveform for general parametrization of
axisymmetric black holes by extending our previous photon sphere+ inspiral model. Our …

Information scrambling is nowadays one of the most important topics in various fields of
research. Measurement-only circuits (MoCs) exhibit specific information scrambling …

We study thin accretion disks in the gravitational field of a class of rotating regular black
holes. Our objective is to determine the key parameters governing these accretion disks: the …

We investigate a class of three parameter metrics that contain both the γ-metric and Janis-
Newman-Winicour (JNW) metric at special values of the parameters. To see the effect of the …

The Johannsen black hole (BH) is a generic rotating BH admitting three constants of motions
(energy, angular momentum and Carter constant) and is characterized by four deviation …

We consider null and timelike geodesics around a spherically symmetric, nonrotating
coherent quantum black hole (CQBH). The classical limit of the geometry of a CQBH departs …