Flux of radiation from pointlike sources in general relativity
| Autor: | Matej Sárený |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Physics
Physics and Astronomy (miscellaneous) Spacetime Geometrical optics 010308 nuclear & particles physics General relativity FOS: Physical sciences Flux General Relativity and Quantum Cosmology (gr-qc) 01 natural sciences General Relativity and Quantum Cosmology Theoretical physics Differential geometry Angular diameter 0103 physical sciences 010303 astronomy & astrophysics Luminosity distance Event (particle physics) |
| Popis: | In the paper we study propagation of light in general relativity through a spacetime filled with cold plasma with infinite conductivity. We use the geometric optics based on Synge's approach. As the main result we provide a formula for calculation of spectral flux of radiation emitted from a pointlike source. The formula employs connecting vectors that are obtained by integrating the ray deviation equation along the reference ray connecting the source and observation event. As a byproduct we formulate Etherington's reciprocity theorem with the inclusion of plasma, interrelating angular size distance and luminosity distance. We also discuss the Liouville theorem and its formulation in terms of connecting vectors. 20 pages, 2 figures |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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