Light deflection by charged wormholes in Einstein-Maxwell-dilaton theory

Jusufi, Kimet; Овгун, Али; Banerjee, Ayan

doi:10.1103/physrevd.96.084036

Cited by 85 publications

(32 citation statements)

References 54 publications

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“…In Refs. [21][22][23][24][25][26][27][28][29][30][31][32][33][34] we find applications of the method to the study of a variety of different spacetimes with spherical symmetry, and in [35] the method was modified by Werner in order to allow the study of gravitational lensing in rotating and stationary spacetimes. This new version was applied to a variety of metrics in Refs.…”

Section: Introductionmentioning

confidence: 99%

Weak lensing in a plasma medium and gravitational deflection of massive particles using the Gauss-Bonnet theorem. A unified treatment

2018

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We apply the Gauss-Bonnet theorem to the study of light rays in a plasma medium in a static and spherically symmetric gravitational field and also to the study of timelike geodesics followed for test massive particles in a spacetime with the same symmetries. The possibility to using the theorem follows from a correspondence between timelike curves followed by light rays in a plasma medium and spatial geodesics in an associated Riemannian optical metric. A similar correspondence follows for massive particles. For some examples and applications, we compute the deflection angle in weak gravitational fields for different plasma density profiles and gravitational fields.PACS numbers:

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Section: Introductionmentioning

confidence: 99%

Weak lensing in a plasma medium and gravitational deflection of massive particles using the Gauss-Bonnet theorem. A unified treatment

2018

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“…where U N = − M r is the Newtonian potential, and M is the mass parameter of the gravitational object. Comparing equations (25) and (26) we identify the mass parameter in the positive asymptotic region as…”

Section: Electrically Charged Wormholesmentioning

confidence: 99%

“…In a geometrical approach to gravitational lensing theory, Gibbons and Werner showed how the Gauss-Bonnet theorem can be applied to the computation of the light deflection angle in the weak deflection limit for static and spherically symmetric spacetimes [19]. The application of this method for wormhole cases was done in references [24,25]. In this section, we apply this method to compute the deflection angle of a light ray passing close to the wormhole described by the solution of section 3.…”

Section: Deflection Angle Via Gauss-bonnet Theoremmentioning

confidence: 99%

Phantom wormholes in Einstein–Maxwell-dilaton theory

Goulart

2017

Class. Quantum Grav.

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Abstract. In this paper we give an electrically charged traversable wormhole solution for the Einstein-Maxwell-dilaton theory when the dilaton is a phantom field, i.e. it has flipped sign kinetic term appearing in the action. In the limit when the charge is zero, we recover the anti-Fisher solution, which can be reduced to the Bronnikov-Ellis solution under certain choices of integration constants. The equations of motion of this theory share the same S-duality invariance of string theory, so the electrically charged solution is rotated into the magnetically charged one by applying such transformations. The scalar field is topological, so we compute its topological charge, and discuss that under appropriate boundary conditions we can have a lump, a kink, or an anti-kink profile. We determine the position of the throat, and show the embedding diagram of the wormhole. As a physical application, we apply the Gauss-Bonnet theorem to compute the deflection angle of a light-ray that passes close to the wormhole.

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“…Recently, Ishihara et al [27][28][29][30] computed the deflection angle in a static, spherically symmetric and asymptotically flat space by using the finite distance from an observer to a light source. Moreover, the GBT has been stretched out to the wormhole geometries and non-asymptotically flat spacetime with topological effects [31][32][33]. A very important contribution has been currently made by Jusufi andÖvgün [34] who discussed about the quantum correction effects on the deflection of light by quantum improved Kerr BH pierced in cosmic string.…”

Section: Introductionmentioning

confidence: 99%

Effect of the Quintessential Dark Energy on Weak Deflection Angle by Kerr-Newmann Black Hole

Javed¹,

Abbas²,

Овгун³

2019

Preprint

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In this work, we study the weak gravitational lensing in the background of Kerr-Newman black hole with quintessential dark energy. Initially, we compute the deflection angle of light by charged black hole with quintessential dark energy by utilizing the Gauss-Bonnet theorem. Firstly, we suppose the light rays on the equatorial plane in the axisymmetric spacetime. In doing so, we first find the corresponding optical metrics and then calculate the Gaussian optical curvature to utilize in Gauss-Bonnet theorem. Consequently, we calculate the deflection angle of light for rotating charged black hole with quintessence. Additionally, we also find the deflection angle of light for Kerr-Newman black hole with quintessential dark energy. In order to verify our results, we derive deflection angle by using null geodesic equations which reduces to the deflection angle of Kerr solution with the reduction of specific parameters. Furthermore, we analyze the graphical behavior of deflection angle $\Theta$ w.r.t to quintessence parameter $\alpha$, impact parameter $b$, BH charge $Q$ and rotation parameter $a$. Our graphical analysis retrieve various results regarding to the deflection angle by the Kerr-Newman black hole with quintessential dark energy.

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Light deflection by charged wormholes in Einstein-Maxwell-dilaton theory

Cited by 85 publications

References 54 publications

Weak lensing in a plasma medium and gravitational deflection of massive particles using the Gauss-Bonnet theorem. A unified treatment

Weak lensing in a plasma medium and gravitational deflection of massive particles using the Gauss-Bonnet theorem. A unified treatment

Phantom wormholes in Einstein–Maxwell-dilaton theory

Effect of the Quintessential Dark Energy on Weak Deflection Angle by Kerr-Newmann Black Hole

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