280 citations · 2.4k across the 47 of their papers we have counts for
4 papers · 1 filter
Analytical approach for calculating shadow of dynamical black hole
Vitalii Vertogradov, Ali Övgün
We develop a compact and transparent framework for photon dynamics and shadow formation in slowly evolving, spherically symmetric spacetimes. Starting from the Eddington-Finkelstei…
Testing black holes with cosmological constant in Einstein-bumblebee gravity through the black hole shadow using EHT data and deflection angle
Reggie C. Pantig, Shubham Kala, Ali Övgün +1
This study probes spacetime solutions within Einstein-Bumblebee gravity, a modified gravitational framework incorporating spontaneous Lorentz symmetry violation through a vector fi…
Quantum gravity effects on particle creation and evaporation in a non-commutative black hole via mass deformation
A. A. Araújo Filho, N. Heidari, Ali Övgün
In this work, we explore a gravitational non-commutative black hole by gauging the de Sitter SO(4,1) group and employing the Seiberg-Witten map. Specifically, we examine modificati…
Analyzing the Influence of Geometrical Deformation on Photon Sphere and Shadow Radius: A New Analytical Approach -Stationary, and Axisymmetric Spacetime
Vitalii Vertogradov, Ali Övgün, Reggie C. Pantig
Black hole shadows and photon spheres offer valuable tools for investigating black hole properties. Recent observations by the Event Horizon Telescope Collaboration have confirmed…