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

Javed, Wajiha; Abbas, Jameela; Kumaran, Yashmitha; Овгун, Али

doi:10.1142/s0219887821500031

Cited by 17 publications

(4 citation statements)

References 90 publications

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“…Then, Crisnejo and Gallo [45] use the GBT to obtain the gravitational deflections of light in a plasma medium in a black hole spacetime. Using this technique, more work was done to compute the deflection angle in plasma medium [65]- [102].…”

Section: Introductionmentioning

confidence: 99%

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

Javed,

Hussain,

Övgün

2022

Preprint

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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.

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Section: Introductionmentioning

confidence: 99%

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

Javed,

Hussain,

Övgün

2022

Preprint

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“…Gullu and Övgün have tested the effect of the global monopole and the bumblebee fields causing the spontaneous Lorentz symmetry-breaking [15]. The authors of [16] have investigated the gravitational lensing by asymptotically flat black holes in the framework of Horndeski theory in weak field limits using the Gauss-Bonnet theorem to find the deflection angle in vacuum and plasma medium.…”

Section: Introductionmentioning

confidence: 99%

Deriving Weak Deflection Angle by Black Holes or Wormholes using Gauss-Bonnet Theorem

Kumaran,

Övgün

2021

Preprint

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In this review, various researches on finding the bending angle of light deflected by a massive gravitating object which regard the Gauss-Bonnet theorem as the premise have been revised. Primarily, the Gibbons and Werner method is studied apropos of the gravitational lensing phenomenon in the weak field limits. Some exclusive instances are deliberated while calculating the deflection angle, beginning with the finite-distance corrections on non-asymptotically flat spacetimes. Effects of plasma medium is then inspected to observe its contribution to the deflection angle. Finally, the Jacobi metric is explored as an alternative method, only to arrive at similar results. All of the cases are probed in three constructs, one as a generic statement of explanation, one for black holes, and one for wormholes, so as to gain a perspective on every kind of influence.

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Section: Introductionmentioning

confidence: 99%

Deriving Weak Deflection Angle by Black Holes or Wormholes using Gauss-Bonnet Theorem

2021

Turk J Phys

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In this review, various researches on finding the bending angle of light deflected by a massive gravitating object which regard the Gauss-Bonnet theorem as the premise have been revised. Primarily, the Gibbons and Werner method is studied apropos of the gravitational lensing phenomenon in the weak field limits. Some exclusive instances are deliberated while calculating the deflection angle, beginning with the finite-distance corrections on nonasymptotically flat spacetimes. Effects of plasma medium is then inspected to observe its contribution to the deflection angle. Finally, the Jacobi metric is explored as an alternative method, only to arrive at similar results. All of the cases are probed in three constructs, one as a generic statement of explanation, one for black holes, and one for wormholes, so as to gain a perspective on every kind of influence.

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

Cited by 17 publications

References 90 publications

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

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

Deriving Weak Deflection Angle by Black Holes or Wormholes using Gauss-Bonnet Theorem

Deriving Weak Deflection Angle by Black Holes or Wormholes using Gauss-Bonnet Theorem

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