212 citations · 6.6k across the 163 of their papers we have counts for
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Weak Gravitational Lensing in Dark Matter and Plasma Mediums for Wormhole-like Static Aether Solution
Wajiha Javed, Sibgha Riaz, Reggie C. Pantig +1
In this paper, we study the deflection angle for wormhole-like static aether solution by using Gibbons and Werner technique in non-plasma, plasma, and dark matter mediums. For this…
Weak deflection angle by Kalb-Ramond Traversable Wormhole in Plasma and Dark Matter Mediums
Wajiha Javed, Hafsa Irshad, Reggie C. Pantig +1
This paper is devoted to compute the weak deflection angle for Kalb-Ramond traversable wormhole solution in plasma and dark matter mediums by using the method of Gibbons and Werner…
Probing Effective Loop Quantum Gravity on Weak Gravitational Lensing, Hawking Radiation and Bounding Greybody Factor by Black Holes
Wajiha Javed, Mehak Atique, Ali Övgün
In this paper, we study the weak deflection angle of black hole in effective loop quantum gravity using the geometrical technique used by Gibbons and Werner. We first derive the op…
Deflection angle and shadow of the Reissner-Nordström black hole with higher-order magnetic correction in Einstein-nonlinear-Maxwell fields
Yashmitha Kumaran, Ali Övgün
Nonlinear electrodynamics is known as the generalizations of Maxwell electrodynamics at strong fields and presents interesting features such as curing the classical divergences pre…
Non-linear Electrodynamics in Blandford-Znajeck Energy Extraction
Amodio Carleo, Gaetano Lambiase, Ali Övgün
Non-linear electrodynamics (NLED) is a generalization of Maxwell's electrodynamics for strong fields. It could have significant implications for the study of black holes and cosmol…
Black hole in quantum wave dark matter
Reggie C. Pantig, Ali Övgün
In this work, we explored the effect of the fuzzy dark matter (FDM) (or wave dark matter) halo on a supermassive black hole (SMBH). Such a dark matter introduces a soliton core den…
Shadow, lensing, quasinormal modes, greybody bounds and neutrino propagation by dyonic ModMax black holes
Reggie C. Pantig, Leonardo Mastrototaro, Gaetano Lambiase +1
Motivated by recent work on the Modified Maxwell (ModMax) black holes [Phys.Lett.B 10.1016/j.physletb.2020.136011], which are invariant in duality rotations and conformal transform…
Testing Symmergent gravity through the shadow image and weak field photon deflection by a rotating black hole using the M87 and Sgr. A results
Reggie C. Pantig, Ali Övgün, Durmuş Demir
In this paper, we study rotating black holes in symmergent gravity, and use deviations from the Kerr black hole to constrain the parameters of the symmergent gravity. Symmergent gr…
Shadows and gravitational weak lensing by the Schwarzschild black hole in the string cloud background with quintessential field
Ghulam Mustafa, Farruh Atamurotov, Ibrar Hussain +2
In this work, we observe that in the presence of the string cloud parameter and the quintessence parameter , with the equation of state parameter the radius o…
Quasiperiodic oscillations, weak field lensing and shadow cast around black holes in Symmergent gravity
Javlon Rayimbaev, Reggie C. Pantig, Ali Övgün +2
In this work, we perform a systematic study of the symmergent gravity in a black hole environment. The symmergent gravity, an emergent gravity model in which gravity emerges in a w…
Testing dynamical torsion effects on the charged black hole's shadow, deflection angle and greybody with M87* and Sgr. A* from EHT
Reggie C. Pantig, Ali Övgün
Poincaré Gauge's theory of gravity is the most noteworthy alternative extension of general relativity that has a correspondence between spin and spacetime geometry. In this paper,…
Weak Deflection Angle and Greybody Bound of Magnetized Regular Black Hole
Wajiha Javed, Sibgha Riaz, Ali Övgün
In this paper, we examine the weak deflection angle and greybody bound for magnetized regular black hole. For this purpose, we apply the Gauss-Bonnet theorem on the black hole a…
Probing a nonlinear electrodynamics black hole with thin accretion disk, shadow and deflection angle with M87* and Sgr A* from EHT
Akhil Uniyal, Reggie C. Pantig, Ali Övgün
Non-linear interaction between the electromagnetic fields (EMF) occurs when vacuum polarization in quantum electrodynamics (QED) happens. The field of non-linear electrodynamics, w…
Strong gravitational lensing and shadow constraint from M87* of slowly rotating Kerr-like black hole
Xiao-Mei Kuang, Ali Övgün
Motivated by (i) more and more interest in strong gravitational lensing by supermassive black holes due to the achievement of EHT observations, (ii) the ongoing popular topic on th…
Effect of the magnetic charge on weak deflection angle and greybody bound of the black hole in Einstein-Gauss-Bonnet gravity
Wajiha Javed, Muhammad Aqib, Ali Övgün
The objective of this paper is to analyze the weak deflection angle of Einstein-Gauss-Bonnet gravity in the presence of plasma medium. To attain our results, we implement the Gibbo…
Gravitational ringing and superradiant instabilities of the Kerr-like black holes in a dark matter halo
Dong Liu, Yi Yang, Ali Övgün +2
Supermassive black holes from the center of galaxy may be immersed in a dark matter halo. This dark matter halo may form a "cusp" structure around the black hole and disappear at a…
Probing hairy black holes caused by gravitational decoupling using quasinormal modes and greybody bounds
Yi Yang, Dong Liu, Ali Övgün +2
Gravitational decoupling can add hair to the black holes by adding extra sources. The quasinormal modes of hairy black hole caused by gravitational decoupling for the massless scal…
Dark matter effect on the weak deflection angle by black holes at the center of Milky Way and M87 galaxies
Reggie C. Pantig, Ali Övgün
In this paper, we investigated the effect of dark matter on the weak deflection angle by black holes at the galactic center. We consider three known dark matter density profiles su…
Dehnen halo effect on a black hole in an ultra-faint dwarf galaxy
Reggie C. Pantig, Ali Övgün
There had been recent advancement toward the detection of ultra-faint dwarf galaxies, which may serve as a useful laboratory for dark matter exploration since some of them contains…
Weak deflection angle of Kazakov-Solodukhin black hole in plasma medium using Gauss-Bonnet theorem and its greybody bonding
Wajiha Javed, Iqra Hussain, Ali Övgün
In this paper, we study light rays in a Kazakov-Solodukhin black hole. To this end, we use the optical geometry of the Kazakov-Solodukhin black hole within the Gauss-bonnet theorem…