Gravitational lensing in the strong field limit

By V. Bozza. 2002

458 citations recorded by the source corpus.

We provide an analytic method to discriminate among different types of black holes on the grounds of their strong field gravitational lensing properties. We expand the deflection angle of the photon in the neighborhood of complete capture, defining a strong field limit, in opposition to the standard weak field limit. This expansion is worked out for a completely generic spherically symmetric spacetime, without any reference to the field equations and just assuming that the light ray follows the geodesics equation. We prove that the deflection angle always diverges logarithmically when the minimum impact parameter is reached. We apply this general ¯ . ,

Subfields: Astronomy and Astrophysics

View Paper: https://www.semanticscholar.org/paper/1b1cb1f91bccad23e63812abf5bde6800f1364f5

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In Astronomy and Astrophysics

Citations in the corpus

Parameter estimation of hairy Kerr black holes from its shadow and constraints from M87* (2021, background): “…black hole shadow is the optical appearance of the black hole caused by the strong gravitational lensing (Virbhadra & Ellis 2000; Bozza et al. 2001; Bozza 2002; Ghosh et al. 2021; Kumar et al. 2020a; Islam et al. 2020) of light near these compact objects and appears as a 2D dark zone for a far…”
Gravitational Lensing in Presence of Plasma: Strong Lens Systems, Black Hole Lensing and Shadow (2017, background): “Analytical calculation of the positions and magnifications of relativistic images was made in the article of the Bozza et al [61].”
Shadows of spherically symmetric black holes and naked singularities (2018, methodology): “These impact parameter values b(rt p) can be obtained by solving α ≃ 2πn, where n is the ring number (Bozza 2002).”
Gravitational lensing by black holes in the 4D Einstein-Gauss-Bonnet gravity (2020, methodology): “However, it was Bozza et al. [49] who first defined the strong-field deflection limit to analytically investigate the Schwarzschild black hole lensing.”
Born–Infeld inspired modifications of gravity (2017, background): “, ω ≪ 1 and Θ ≪ 1 (and (∆φn−Θ) ≪ 1, where ∆φn ≡ ∆ − 2πn is the deflection angle when all the loops of photons around the EiBI black hole are removed [83]), and using also that in the lens geometry b ≃ DOLΘ one gets the deflection angle”