Spatial dispersion of light rays propagating through a plasma in Kerr spacetime
| Autor: | Silvia Zane, Tom Kimpson, Kinwah Wu |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Astrophysics::High Energy Astrophysical Phenomena
FOS: Physical sciences General Relativity and Quantum Cosmology (gr-qc) 01 natural sciences General Relativity and Quantum Cosmology Gravitation symbols.namesake Pulsar Physics::Plasma Physics 0103 physical sciences 010303 astronomy & astrophysics Physics High Energy Astrophysical Phenomena (astro-ph.HE) Spacetime 010308 nuclear & particles physics Space time Astronomy and Astrophysics Plasma Ray Computational physics Space and Planetary Science symbols Impact parameter Astrophysics - High Energy Astrophysical Phenomena Hamiltonian (quantum mechanics) |
| DOI: | 10.48550/arxiv.1901.03733 |
| Popis: | 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. Comment: 9 pages, 6 figures. Accepted for publication in MNRAS |
| Databáze: | OpenAIRE |
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