Strong gravitational lensing in non-commutative wormholes

Sharif, M.; Iftikhar, Sehrish

doi:10.1007/s10509-015-2231-9

Cited by 58 publications

(34 citation statements)

References 22 publications

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“…Then using data taken during a solar eclipse in 1919, Eddington measured a a e-mails: wajiha.javed@ue.edu.pk; wajihajaved84@yahoo.com b e-mail: jameelaabbas30@gmail.com c e-mail: ali.ovgun@pucv.cl URL: https://www.aovgun.com value close to that of the GR prediction [5,6]. Then gravitational lensing has been worked in various space-times using different methods [7][8][9][10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Deflection angle of photon from magnetized black hole and effect of nonlinear electrodynamics

2019

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In this paper, we analyze deflection angle of photon from magnetized black hole within non-linear electrodynamics with parameter β. In doing so, we find the corresponding optical spacetime metric and then we calculate the Gaussian optical curvature. Using the Gauss-Bonnet theorem, we obtain the deflection angle of photon from magnetized black hole in weak field limits and show the effect of non-linear electrodynamics on weak gravitational lensing. We also analyzed that our results reduces into Maxwell's electrodynamics and Reissner-Nordström (RN) solution with the reduction of parameters. Moreover, we also investigate the graphical behavior of deflection angle w.r.t correction parameter, black hole charge and impact parameter.

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Section: Introductionmentioning

confidence: 99%

Deflection angle of photon from magnetized black hole and effect of nonlinear electrodynamics

2019

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“…Such studies show that, in some cases, lensing by a naked singularity is qualitatively different from that by a black hole. Gravitational lensing [59][60][61][62][63][64][65][66][67][68][69][70] and microlensing [71][72][73] by wormholes has been a topic of growing interest in the recent past too. It has been shown that gravitational lensing can be used as a distinguishing probe between black holes and wormholes [72,74,75].…”

Section: Introductionmentioning

confidence: 99%

Gravitational lensing by scalar-tensor wormholes and the energy conditions

Shaikh

Kar

2017

Phys. Rev. D

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We study gravitational lensing by a class of zero Ricci scalar wormholes which arise as solutions in a scalar-tensor theory of gravity. An attempt is made to find a possible link between lensing features, stable/unstable photon orbits and the energy conditions on the matter required to support these spacetimes. Our analysis shows (for this class of wormholes) that light rays always exhibit a positive deflection if the energy conditions are satisfied (nonexotic matter content). In contrast, if the energy conditions are violated (exotic matter), the net deflection of a light ray may be positive, negative or even zero, depending on values of the metric and impact parameters. This prompts us to introduce a surface defined by a turning point value at which the net deflection of a light ray is equal to zero, even though we have a curved spacetime geometry. We argue that the existence of such a surface may be linked to exotic/energy condition violating matter. Wormholes in modified gravity with matter satisfying the energy conditions do not seem to have such a zero deflection surface. Finally, we study strong gravitational lensing briefly and also look into the formation of Einstein and relativistic Einstein rings. We conclude with some estimates on the wormhole mass, throat-radius and the detectability of the Einstein rings. * rajibulshaikh@cts.iitkgp.ernet.in; Present address:

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“…Then using data taken during a solar eclipse in 1919, Eddington measured a value close to that of the GR prediction [5,6]. Then gravitational lensing has been worked in various space-times using different methods [7][8][9][10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Deflection Angle of Photon from Magnetized Black Hole and Effect of Nonlinear Electrodynamics

Javed

Abbas

Овгун

2019

Preprint

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In this paper, we analyze deflection angle of photon from magnetized black hole within non-linear electrodynamics with parameter β. In doing so, we find the corresponding optical spacetime metric and then we calculate the Gaussian optical curvature. Using the Gauss-Bonnet theorem, we obtain the deflection angle of photon from magnetized black hole in weak field limits and show the effect of nonlinear electrodynamics on weak gravitational lensing. We also analyzed that our results reduces into Maxwell's electrodynamics and Reissner-Nordström (RN) solution with the reduction of parameters. Moreover, we also investigate the graphical behavior of deflection angle w.r.t correction parameter, black hole charge and impact parameter.

show abstract

Strong gravitational lensing in non-commutative wormholes

Cited by 58 publications

References 22 publications

Deflection angle of photon from magnetized black hole and effect of nonlinear electrodynamics

Deflection angle of photon from magnetized black hole and effect of nonlinear electrodynamics

Gravitational lensing by scalar-tensor wormholes and the energy conditions

Deflection Angle of Photon from Magnetized Black Hole and Effect of Nonlinear Electrodynamics

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