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Spatial dispersion of light rays propagating through a plasma in Kerr spacetime

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arxiv 1901.03733 v2 pith:5XGJTMJN submitted 2019-01-11 astro-ph.HE gr-qc

Tom Kimpson , Kinwah Wu , Silvia Zane This is my paper · ORCID
classification astro-ph.HEgr-qc
keywords plasmadispersionlightkerrpropagatingspacetimebackgroundbeams
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We investigate the propagation of light through a plasma on a background Kerr spacetime via a Hamiltonian formulation. The behaviour of light when propagating through a vacuum and through a plasma is not the same; the convolution of gravitational and plasma effects gives rise to a dispersion in both space and time. The magnitude of the dispersion is a strong function of both the ray frequency and impact parameter. We discuss implications for the detection of gravitationally bent pulsar beams near the Galactic centre.

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Cited by 1 Pith paper

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  1. Gravitational lensing in a plasma from worldlines

    hep-th 2024-12 conditional novelty 6.0 of 10

    The worldline formalism yields a closed-form NLO plasma-induced deflection angle for power-law electron density, matching previous results where they exist.

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