212 citations · 2.2k across the 76 of their papers we have counts for
7 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…
Growth of matter overdensities in non-minimal torsion-matter coupling theories
Manuel Gonzalez-Espinoza, Giovanni Otalora, Joel Saavedra +1
We study the evolution of cosmological perturbations around a homogeneous and isotropic background in the framework of the non-minimal torsion-matter coupling extension of g…
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 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…