Weak deflection angle by asymptotically flat black holes in Horndeski theory using Gauss–Bonnet theorem
Wajiha JavedDivision of Science and Technology, University of Education, Township, Lahore 54590, PakistanJameela AbbasDepartment of Mathematics, University of Education, Township, Lahore 54590, PakistanYashmitha KumaranPhysics Department, Eastern Mediterranean University, Famagusta, 99628 North Cyprus via Mersin 10, TurkeyAli ÖvgünPhysics Department, Eastern Mediterranean University, Famagusta, 99628 North Cyprus via Mersin 10, Turkey
2020en
ABI
Abstract
The principal objective of this project is to investigate the gravitational lensing by asymptotically flat black holes in the framework of Horndeski theory in weak field limits. To achieve this objective, we utilize the Gauss–Bonnet theorem to the optical geometry of asymptotically flat black holes and apply the Gibbons–Werner technique to achieve the deflection angle of photons in weak field limits. Subsequently, we manifest the influence of plasma medium on deflection of photons by asymptotically flat black holes in the context of Horndeski theory. We also examine the graphical impact of deflection angle on asymptotically flat black holes in the background of Horndeski theory in plasma medium as well as non-plasma medium.
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