Journal
INTERNATIONAL JOURNAL OF GEOMETRIC METHODS IN MODERN PHYSICS
Volume 18, Issue 1, Pages -Publisher
WORLD SCIENTIFIC PUBL CO PTE LTD
DOI: 10.1142/S0219887821500031
Keywords
Weak gravitational lensing; deflection of light; black hole; deflection angle; Horndeski theory; Gauss-Bonnet theorem
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The main goal of this project is to investigate the gravitational lensing by asymptotically flat black holes in the context of Horndeski theory in weak field limits. The study utilizes the Gauss-Bonnet theorem and Gibbons-Werner technique to calculate the deflection angle of photons, and examines the influence of plasma medium on this effect. The research also explores the graphical impact of deflection angle on asymptotically flat black holes in both plasma and non-plasma medium.
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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