260 citations · 6.2k across the 131 of their papers we have counts for
14 papers · 1 filter
Shadow and Deflection Angle of Rotating Black Holes in Perfect Fluid Dark Matter with a Cosmological Constant
Sumarna Haroon, Mubasher Jamil, Kimet Jusufi +2
The presence of dark matter around a black hole remarkably affects its spacetime. We consider the effects of dark matter on the shadow of a new solution to the Einstein equations t…
Distinguishing rotating naked singularities from Kerr-like wormholes by their deflection angles of massive particles
Kimet Jusufi, Ayan Banerjee, Galin Gyulchev +1
We study the gravitational deflection of relativistic massive particles by Janis-Newman-Winicour (JNW) spacetimes (also known as a rotating source with a surface-like naked singula…
Determining the Topology and Deflection Angle of Ringholes via Gauss-Bonnet Theorem
Kimet Jusufi
In this letter, we use a recent wormhole solution known as a ringhole [Gonzalez-Diaz, Phys.\ Rev.\ D {\bf 54}, 6122, 1996] to determine the surface topology and the deflection angl…
Shadow images of Kerr-like wormholes
Muhammed Amir, Kimet Jusufi, Ayan Banerjee +1
Investigations of shadows of astrophysical entities constitute a major source of insight into the evolution of compact objects. Such effects depend on the nature of the compact obj…
Weak Gravitational lensing by phantom black holes and phantom wormholes using the Gauss-Bonnet theorem
Ali Övgün, Galin Gyulchev, Kimet Jusufi
In this paper, we study the deflection of light by a class of phantom black hole and wormhole solutions in the weak limit approximation. More specifically, in the first part of thi…
Gravitational deflection of relativistic massive particles by Kerr black holes and Teo wormholes viewed as a topological effect
Kimet Jusufi
We consider the problem of gravitational deflection of a propagating relativistic massive particles by rotating black holes (Kerr black holes) and rotating wormholes (Teo wormholes…
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.…
Gravitational Lensing Under the Effect of Weyl and Bumblebee Gravities: Applications of Gauss-Bonnet Theorem
Ali Övgün, Kimet Jusufi, Izzet Sakalli
In this paper, we use the Gauss Bonnet theorem to obtain the deflection angle by the photons coupled to Weyl tensor in a Schwarzschild black hole and Schwarzschild-like black hole…
Exact traversable wormhole solution in bumblebee gravity
Ali Övgün, Kimet Jusufi, İzzet Sakallı
In this study, we found a new traversable wormhole solution in the framework of a bumblebee gravity model. With these types of models, the Lorentz symmetry violation arises from th…
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…
Conical Morris-Thorne Wormholes with a Global Monopole Charge
Kimet Jusufi
In this paper we have established an asymptotically conical Morris-Thorne wormhole solution supported by anisotropic matter fluid and a global monopole charge in the framework of a…
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…
Complexity growth rates for AdS black holes with dyonic/ nonlinear charge/ stringy hair/ topological defects
Ali Övgün, Kimet Jusufi
In a seminal paper by Brown et al. [Phys. Rev. Lett. 116, no. 19, 191301 (2016)] a new conjecture was proposed, namely it was argued that the quantum complexity of a holographic st…
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…