Weak deflection angle of Kazakov-Solodukhin black hole in plasma medium using Gauss-Bonnet theorem and its greybody bonding

Abstract

In this paper, we study light rays in a Kazakov-Solodukhin black hole. To this end, we use the optical geometry of the Kazakov-Solodukhin black hole within the Gauss-bonnet theorem. We first show the effect of the deformation parameter a on the Gaussian optical curvature, and then we use the modern method popularized by Gibbons and Werner to calculate the weak deflection angle of light. Our calculations of deflection angle show how gravitational lensing is affected by the deformation parameter a. Moreover, we demonstrate the effect of a plasma medium on weak gravitational lensing by the Kazakov-Solodukhin black hole. We discuss that the increasing the deformation parameter a, will increase the weak deflection angle of the black hole. Our analysis also uncloak how one may find a observational evidence for a deformation parameter on the deflection angle. In addition, we studied the rigorous bounds of the Kazakov-Solodukhin black hole for the grey body factor and also studied the graphical behaviour of the bounds by fixing l = 0 and M = 1 and observed that increasing the deformation parameter a will decrease the rigorous bound T b of the black hole.

Shadow, lensing, quasinormal modes, greybody bounds and neutrino propagation by dyonic ModMax black holes

“…Sanchez showed that the absorption spectrum as a function of the frequency makes clear oscillations characteristic of a diffraction pattern, where the oscillations occur around the constant value of the geometrical optics with decreasing amplitude and constant period. The absorption cross-section for black holes has been studied in the literature for various black hole spacetimes [46,108,[135][136][137][138][139][140][141][142][143][144][145][146], especially for the low-frequency behaviour of the absorption and for the zero-frequency limit (it becomes equal to the surface area of the black hole horizon) [136,147,148], as well as the high-frequency behaviour of the scalar absorption via Sinc approximation [134,149,150].…”

Testing the Metric-Affine Gravity Using Particle Dynamics and Photon Motion

“…This deflection angle differs significantly from the vacuum case. Several authors have studied the impact of different plasma topologies and works on light propagation, providing deep insight into this fascinating area of research [15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30]. Understanding gravitational lensing in plasma has significant implications for our understanding of the universe and the behavior of light in different environments.…”