Weak deflection angle by asymptotically flat black holes in Horndeski theory using Gauss-Bonnet theorem

Wajiha Javed, Jameela Abbas, Yashmitha Kumaran, ALI OVGUN

Research output: Contribution to journalArticlepeer-review

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.

Original languageEnglish
Article number2150003
JournalInternational Journal of Geometric Methods in Modern Physics
Volume18
Issue number1
DOIs
StatePublished - Jan 2021
Externally publishedYes

Keywords

  • black hole
  • deflection angle
  • deflection of light
  • Gauss-Bonnet theorem
  • Horndeski theory
  • Weak gravitational lensing

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