212 citations · 6.6k across the 163 of their papers we have counts for
12 papers · 1 filter
Motion and collision of particles near DST Black holes
P. A. González, Marco Olivares, Yerko Vásquez +2
We consider Deser-Sarioglu-Tekin (DST) black holes as background and we study such the motion of massive particles as the collision of two spinning particles in the vicinity of its…
PV criticality of Achucarro-Ortiz black hole in the presence of higher order quantum and GUP corrections
Behnam Pourhassan, Ali Övgün, İzzet Sakallı
In this paper, we study quantum-corrected and GUP-(generalized uncertainty principle) corrected thermodynamics of the (2+1)-dimensional charged-rotating Achucarro-Ortiz (AO) black…
Novel nonlinear electrodynamics black hole and related phenomena in the extended thermodynamics
Xiao-Mei Kuang, Bo Liu, Ali Övgün
In this paper, we present the analytic solution for Anti-de Sitter-Nonlinear electrodynamics (AdS-NED) black hole in four dimensions. We study tunneling of vector particles from th…
Shadow cast and Deflection angle of Kerr-Newman-Kasuya spacetime
Ali Övgün, İzzet Sakallı, Joel Saavedra
We study the shadow cast or silhouette generated by a Kerr-Newman-Kasuya (KNK) spacetime (rotating dyon black hole). It is shown that in addition to the angular momentum of the bla…
Weak gravitational lensing by Kerr-MOG Black Hole and Gauss-Bonnet theorem
Ali Övgün, İzzet Sakallı, Joel Saavedra
The deflection angle of Kerr-MOG black holes is studied for different values of the parameter in modified gravity (MOG). To this end, we employ the Gauss-Bonnet theorem, which was…
Deflection angle of photon through dark matter by black holes and wormholes using the Gauss-Bonnet theorem
Ali Övgün
In this research, we use the Gibbons-Werner method (Gauss-Bonnet theorem) on the optical geometry of a black hole and wormhole, extending the calculation of the weak gravitational…
Deflection of light by rotating regular black holes using the Gauss-Bonnet theorem
Kimet Jusufi, Ali Övgün, Joel Saavedra +2
In this paper, we study the weak gravitational lensing in the spacetime of rotating regular black hole geometries such as Ayon-Beato-García (ABG), Bardeen, and Hayward black holes.…
Inflation from a nonlinear magnetic monopole field nonminimally coupled to curvature
Giovanni Otalora, Ali Övgün, Joel Saavedra +1
In the context of nonminimally coupled gravity theories, we study early inflation driven by a nonlinear monopole magnetic field which is nonminimally coupled to curvature. I…
Analytical Solutions in a Cosmic String Born-Infeld-dilaton Black Hole Geometry: Quasinormal Modes and Quantization
İzzet Sakallı, Kimet Jusufi, Ali Övgün
Chargeless massive scalar fields are studied in the spacetime of Born-Infeld dilaton black holes (BIDBHs). We first separate the massive covariant Klein-Gordon equation into radial…
Evolving topologically deformed wormholes supported in the dark matter halo
Ali Övgün
In this paper, we construct an evolving wormhole in the dark matter halo. This work is relevant since matter has two components: (i) cosmological part (only time-dependent) and (ii…
Gravitational lensing by wormholes supported by electromagnetic, scalar, and quantum effects
Kimet Jusufi, Ali Övgün, Ayan Banerjee +1
Wormholes are one of the most interesting topological features in spacetime, offering a rat run between two vastly separated regions of the universe. In this paper, we study the de…
Quasinormal Modes and Greybody Factors of gravity minimally coupled to a cloud of strings in Dimensions
Ali Övgün, Kimet Jusufi
In this paper we have studied the propagation of a massless scalar field minimally coupled to a black hole with the source of cloud of strings in gravity theory. In par…