212 citations · 6.6k across the 163 of their papers we have counts for
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Signatures of a de Sitter-core black hole in ringing, transmission and optical appearance
N. Heidari, A. A. Araújo Filho, V. Vertogradov and +1
We investigate a static, asymptotically flat black hole whose central region approaches a de Sitter vacuum. The geometry is controlled by the ADM mass and a core scale , a…
Influence of GUP corrected Casimir energy on zero tidal force wormholes in modified teleparallel gravity with matter coupling
Mohammed Muzakkir Rizwan, Zinnat Hassan, P. K. Sahoo +1
In recent times, the study of the Casimir effect in quantum field theory has garnered increasing attention because of its potential to be an ideal source of exotic matter needed fo…
Absorption, Scattering, Geodesics, Shadows and Lensing Phenomena of Black Holes in Effective Quantum Gravity
N. Heidari, A. A. Araújo Filho, R. C. Pantig +1
In this work, we investigate the signatures of black holes within an effective quantum gravity framework recently proposed in the literature [1] . We begin by outlining the general…
Quasinormal Modes and Greybody Factors of Charged Symmergent Black Hole
Dhruba Jyoti Gogoi, Beyhan Puliçe, Ali Övgün
In this paper, we investigate quasinormal modes (QNMs) and greybody factors within the framework of Symmergent gravity, an emergent gravity model with an curvature sector…
An Effective Model for the Quantum Schwarzschild Black Hole: Weak Deflection Angle, Quasinormal Modes and Bounding of Greybody Factor
Ángel Rincón, Ali Övgün, Reggie C. Pantig
In this paper, we thoroughly explore two crucial aspects of a quantum Schwarzschild black solution within four-dimensional space-time: i) the weak deflection angle, ii) the rigorou…
Modified particle dynamics and thermodynamics in a traversable wormhole in bumblebee gravity
A. A. Araújo Filho, J. A. A. S. Reis, Ali Övgün
In this work, we analyze various phenomena influenced by the gravitational field in a bumblebee gravity solution, with a particular emphasis on a traversable wormhole for massless…
Strange Quark Stars and Condensate Dark Stars in Bumblebee Gravity
Grigoris Panotopoulos, Ali Övgün
In this paper, we investigate the properties of relativistic stars made of isotropic matter within the framework of the minimal Standard Model Extension, where a Bumblebee field (B…
Weak field deflection angle and analytical parameter estimation of the Lorentz-violating Bumblebee parameter through the black hole shadow using EHT data
Gaetano Lambiase, Reggie C. Pantig, Ali Övgün
We explored how the Lorentz symmetry breaking parameter affects the Reissner-Nordstöm BH solution in the context of weak field deflection angle, and the black hole shadow. W…
Exact Regular Black Hole Solutions with de Sitter Cores and Hagedorn Fluid
Vitalii Vertogradov, Ali Övgün
In this paper, we present three exact solutions to the Einstein field equations, each illustrating different black hole models. The first solution introduces a black hole with a va…
Traces of quantum gravitational correction at third-order curvature through the black hole shadow and particle deflection at the weak field limit
Gaetano Lambiase, Reggie C. Pantig, Ali Övgün
This study investigates the impact of the quantum-gravity correction at the third-order curvature () on the black hole's shadow and deflection angle on the weak field regime,…
Imprints of a gravitational wave through the weak field deflection of photons
Reggie C. Pantig, Ali Övgün
This paper investigates the novel phenomenon of gravitational lensing experienced by gravitational waves traveling past a Schwarzschild black hole perturbed by a specific, first-or…
Shadow and quasinormal modes of the rotating Einstein-Euler-Heisenberg black holes
Gaetano Lambiase, Dhruba Jyoti Gogoi, Reggie C. Pantig +1
The Einstein-Euler-Heisenberg (EEH) black hole model is an extension of classical black hole solutions in general relativity, incorporating quantum electrodynamics (QED) effects vi…
Effects of non-commutative geometry on black hole properties
A. A. Araújo Filho, J. R. Nascimento, A. Yu. Petrov +2
In this study, we investigate the signatures of a non-commutative black hole solution. Initially, we calculate the thermodynamic properties of the system, including entropy, heat c…
General Approach on Shadow Radius and Photon Spheres in Asymptotically Flat Spacetimes and the Impact of Mass-Dependent Variations
Vitalii Vertogradov, Ali Övgün
Recent observations of black hole shadows have revolutionized our ability to probe gravity in extreme environments. This manuscript presents a novel analytic method to calculate, i…
Analyzing the Influence of Geometrical Deformation on Photon Sphere and Shadow Radius: A New Analytical Approach -- Spherically Symmetric Spacetimes
Vitalii Vertogradov, Ali Övgün
In this paper, we introduce a new approach to study the behavior of the photon sphere and shadow radius. Our method uses extended gravitational decoupling and reveals two important…
The Effect of Quark-antiquark Confinement on the Deflection Angle by the NED Black Hole
Erdem Sucu, Ali Övgün
In this study, we explore the influence of quark-antiquark confinement on the deflection angle within the framework of nonlinear electrodynamic (NED) black holes. To achieve this,…
Asymptotically-Flat Black Hole Solutions in Symmergent Gravity
Beyhan Puliçe, Reggie C. Pantig, Ali Övgün +1
Symmergent gravity is an emergent gravity model with an curvature sector and an extended particle sector having new particles beyond the known ones. With constant scalar cu…
Shadow and greybody bounding of a regular scale-dependent black hole solution
Ali Övgün, Reggie C. Pantig, Ángel Rincón
In this manuscript, we explore the shadow and the greybody bounding characteristics of a regular black hole within 4-dimensional space-time, employing the context of gravity that i…
Exploring light deflection and black hole shadows in Rastall theory with plasma effects
Riasat Ali, Xia Tiecheng, Rimsha Babar +1
In this article, we examine the gravitational deflection of particles in curved spacetime immersed in perfect fluid in the context of Rastall theory. We propose an infinite region…
Traversable Wormholes in Minimally Geometrical Deformed Trace-Free Gravity using Gravitational Decoupling
Piyachat Panyasiripan, Narakorn Kaewkhao, Phongpichit Channuie +1
In this work, we investigate wormhole solutions through the utilization of gravitational decoupling, employing the Minimal Geometric Deformation (MGD) procedure within the framewor…