36 papers
Where Thermodynamics Meets Geometry: Critical-Radius Coincidences in Confining-NED Black Holes with Barrow Entropy
Erdem Sucu, İzzet Sakallı
We study a static, spherically symmetric black hole obtained from Einstein gravity coupled to a nonlinear electrodynamics model with a quark--antiquark confinement interaction. The…
CFT Constraints on the Weak Gravity Conjecture
Saeed Noori Gashti, Behnam Pourhassan, İzzet Sakallı
The Weak Gravity Conjecture (WGC) is a swampland criterion of long standing: any consistent theory of quantum gravity must contain a charged particle whose charge-to-mass ratio exc…
Renormalization-group improved Schwarzschild black hole: shadow, ringdown, and strong cosmic censorship
Ahmad Al-Badawi, Faizuddin Ahmed, İzzet Sakallı
A renormalization-group (RG) improved Schwarzschild-like black hole (BH) is studied here, with a lapse that interpolates between a classical Schwarzschild exterior and a quantum-sm…
MCMC Constraints on Dyonic Kalb-Ramond Black Holes with a Cloud of Strings from Twin-Peak QPOs and EHT Shadows
Faizuddin Ahmed, Ahmad Al-Badawi, İzzet Sakallı
We study a dyonic black hole in a Lorentz-violating gravity that carries a background Kalb--Ramond field and is pierced by a cloud of strings. The resulting metric reduces to the r…
Particle Dynamics, Shadow and Hawking Sparsity of a Kalb-Ramond Black Hole Coupled to Nonlinear Electrodynamics
Faizuddin Ahmed, Ahmad Al-Badawi, İzzet Sakallı
We study the timelike and null geodesic structure of a static, spherically symmetric black hole sourced by a Kalb--Ramond (KR) field coupled to nonlinear electrodynamics (NED). The…
Spin-(, , ) Field Perturbations, Quasinormal Modes, Overtones, Greybody Factors and Strong Cosmic Censorship of Einstein-Skyrme Black Holes
Faizuddin Ahmed, Ahmad Al-Badawi, İzzet Sakallı
We carry out a multi-spin perturbation-theory study of the four-dimensional Einstein-Skyrme (ES) anti-de Sitter (AdS) black hole (BH), whose lapse i…