Kimpson, Tom;
Wu, Kinwah;
Zane, Silvia;
(2019)
Spatial dispersion of light rays propagating through a plasma in Kerr spacetime.
Monthly Notices of the Royal Astronomical Society
, 484
(2)
pp. 2411-2419.
10.1093/mnras/stz138.
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Abstract
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.
| Type: | Article |
|---|---|
| Title: | Spatial dispersion of light rays propagating through a plasma in Kerr spacetime |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1093/mnras/stz138 |
| Publisher version: | https://doi.org/10.1093/mnras/stz138 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Black hole physics, gravitation, pulsars: general |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Space and Climate Physics |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10065759 |
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