Horizon-scale tests of gravity theories and fundamental physics from the Event Horizon Telescope image of Sagittarius A

S Vagnozzi, R Roy, YD Tsai, L Visinelli… - … and Quantum Gravity, 2023 - iopscience.iop.org
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 …

Weak gravitational lensing and shadow of a GUP-modified Schwarzschild black hole in the presence of plasma

H Hoshimov, O Yunusov, F Atamurotov, M Jamil… - Physics of the Dark …, 2024 - Elsevier
In this work, we have studied weak gravitational lensing effect around black hole and
determine shadow radius in GUP-corrected-Schwarzschild spacetime (S-GUP) in presence …

Thermodynamics and shadows of GUP-corrected black holes with topological defects in Bumblebee gravity

R Karmakar, DJ Gogoi, UD Goswami - Physics of the Dark Universe, 2023 - Elsevier
In this work we investigate a Schwarzschild-type black hole that is corrected by the
Generalised Uncertainty Principle (GUP) and possesses topological defects within the …

Exploring non-commutativity as a perturbation in the Schwarzschild black hole: quasinormal modes, scattering, and shadows

N Heidari, H Hassanabadi, AAA Filho, J Kriz - The European Physical …, 2024 - Springer
In this work, by a novel approach to studying the scattering of a Schwarzschild black hole,
the non-commutativity is introduced as perturbation. We begin by reformulating the Klein …

Quasinormal modes and greybody factors of symmergent black hole

DJ Gogoi, A Övgün, D Demir - Physics of the Dark Universe, 2023 - Elsevier
Symmergent gravity is an emergent gravity framework in which gravity emerges guided by
gauge invariance, accompanied by new particles, and reconciled with quantum fields. In this …

[HTML][HTML] Generalized Extended Uncertainty Principle Black Holes: Shadow and lensing in the macro-and microscopic realms

NJLS Lobos, RC Pantig - Physics, 2022 - mdpi.com
Motivated by the recent study about the extended uncertainty principle (EUP) black holes,
we present in this study its extension called the generalized extended uncertainty principle …

Constraints on quasinormal modes from black hole shadows in regular non-minimal Einstein Yang–Mills gravity

DJ Gogoi, S Ponglertsakul - The European Physical Journal C, 2024 - Springer
This work deals with scalar quasinormal modes using the higher-order WKB method and
black hole shadow in non-minimal Einstein–Yang–Mills theory. To validate the results of …

Tideless traversable wormholes surrounded by cloud of strings in f (R) gravity

DJ Gogoi, UD Goswami - Journal of Cosmology and Astroparticle …, 2023 - iopscience.iop.org
We study the tideless traversable wormholes in the f (R) gravity metric formalism. First we
consider three shape functions of wormholes and study their viabilities and structures. The …

Quasinormal modes, thermodynamics and shadow of black holes in Hu–Sawicki f (R) gravity theory

R Karmakar, UD Goswami - The European Physical Journal C, 2024 - Springer
We derive novel black hole solutions in a modified gravity theory, namely the Hu–Sawicki
model of f (R) gravity. After obtaining the black hole solution, we study the horizon radius of …

Quasinormal modes and optical properties of 4-D black holes in Einstein Power-Yang–Mills gravity

DJ Gogoi, J Bora, M Koussour, Y Sekhmani - Annals of Physics, 2023 - Elsevier
This paper explores the impact of the Yang–Mills charge parameter and the exponent term
on a 4D black hole solution in the Einstein Power-Yang–Mills theory. Through an …