Strong Gravitational Lensing by the R-Charged Non-Extremal Black Hole

TL;DR

This paper investigates gravitational lensing caused by five-dimensional R-charged non-extremal black holes, analyzing photon orbits, effective potential, and how black hole charge influences light deflection.

Contribution

It provides a detailed analysis of photon trajectories and lensing effects specific to R-charged non-extremal black holes, highlighting the impact of charges and non-extremality.

Findings

Black hole charges increase the effective potential.

Photons do not cross the horizon of large R-charged black holes.

Charges and non-extremality reduce the deflection angle.

Abstract

In this paper, gravitational lensing scenario due to the R-charged black hole of five dimensional supergravity investigated. We study the effective potential of traveling photons near the R-charged black hole and find some stable orbits for the photons. We also find that the effect of the black hole charges is increasing of the effective potential. We have shown that photons do not cross the horizon of the very large R-charged black hole. By using the numerical study we find that the black hole charges and non-extremality parameter decrease value of the deflection angle.