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Gravitational Lensing in presence of Plasma: Strong Lens Systems, Black Hole Lensing and Shadow

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arxiv 1905.06615 v1 pith:ZUSMR3CH submitted 2019-05-16 gr-qc astro-ph.CO

Gennady S. Bisnovatyi-Kogan , Oleg Yu. Tsupko This is my paper · ORCID
classification gr-qcastro-ph.CO
keywords plasmalensingblackgravitationalrefractionchromaticdeflectioneffects
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In this article, we present an overview of the new developments in problems of the plasma influence on the effects of gravitational lensing, complemented by pieces of new material and relevant discussions. Deflection of light in the presence of gravity and plasma is determined by a complex combination of various physical phenomena: gravity, dispersion, refraction. In particular, the gravitational deflection itself, in a homogeneous plasma without refraction, differs from the vacuum one and depends on the frequency of the photon. In an inhomogeneous plasma, chromatic refraction also takes place. We describe chromatic effects in strong lens systems including a shift of angular position of image and a change in magnification. We also investigate high-order images that arise when lensing on a black hole surrounded by homogeneous plasma. The recent results of analytical studies of the effect of plasma on the shadow of the Schwarzschild and Kerr black holes are presented.

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Cited by 3 Pith papers

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

  1. Optical Characteristics of the Kerr-Bertotti-Robinson Black Hole

    gr-qc 2025-08 conditional novelty 6.0 of 10

    For the Kerr-Bertotti-Robinson black hole, the magnetic field mainly enlarges the shadow and Einstein ring while rotation mainly distorts the shadow shape, and current M87* and Sgr A* data give only weak bounds on the field.

  2. Periodic Timelike Motion and Gravitational Wave Signatures around a Magnetically Charged Black Hole Surrounded by Quintessence

    gr-qc 2026-06 unverdicted novelty 4.0 of 10

    Quintessence shifts orbital radii, turning points, and zoom-whirl parameters for timelike geodesics around a magnetically charged black hole, producing burst-like gravitational waveforms whose phase, timing, and milli...

  3. Plasma effects on gravitational lensing and shadow observables of a Kerr-like black hole in a dark matter halo

    gr-qc 2026-03 conditional novelty 4.0 of 10

    Homogeneous plasma enlarges Kerr-like black-hole shadows and emission rates while inhomogeneous plasma shrinks them; astrophysical dark-matter densities leave photon orbits essentially unchanged.

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