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Weak gravitational lensing of regular black holes with cosmic strings using the Gauss-Bonnet theorem

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arxiv 1902.04411 v3 pith:6JR7NDXK submitted 2019-02-10 gr-qc

A. Övgün This is my paper · ORCID
classification gr-qc
keywords lightbendingblackcosmicweakangledeflectioneffect
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abstract

In this paper, we investigate light bending in the spacetime of regular black holes with cosmic strings in weak field limits. To do so, we apply the Gauss-Bonnet theorem to the optical geometry of the black hole; and, using the Gibbons-Werner method, we obtain the deflection angle of light in the weak field limits which shows that the bending of light is a global and topological effect. Afterwards, we demonstrate the effect of a plasma medium on the deflection of light by RBCS. We discuss that increasing cosmic string parameter $\mu$ and mass $M_0$ will increase the bending angle.

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Cited by 4 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Strong field gravitational lensing of particles by a black-bounce-Schwarzschild black hole

    gr-qc 2026-02 accept novelty 5.0 of 10

    For a black-bounce-Schwarzschild black hole, the paper derives the strong-deflection lensing observables for massive particles and quantifies how they differ from photon lensing.

  2. Chaotic imprints of dark matter in extreme mass-ratio inspirals

    gr-qc 2026-02 reject novelty 4.0 of 10

    A toy model shows that adding a hand-made angle-dependent force to dark-matter spacetimes produces visual chaos and irregular numerical-Kludge waveforms, but the force is not a realistic dark-matter perturbation.

  3. Strong gravitational lensing by black hole in F(R) Euler Heisenberg Gravity's Rainbow

    astro-ph.GA 2025-07 conditional novelty 4.0 of 10

    Applying the strong deflection limit to the F(R)-Euler-Heisenberg-Rainbow black hole gives lensing observables that increase with the Euler-Heisenberg parameter and decrease with charge.

  4. Analyzing Deflection Angles and Photon Sphere Dynamics of Magnetically Charged Black Holes in Nonlinear Electrodynamic

    gr-qc 2025-02 reject novelty 4.0 of 10

    A new closed-form weak deflection angle and shadow analysis for a magnetically charged NED black hole, with strong-field results that reduce to Schwarzschild after a mass redefinition.

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