Electromagnetic fields in curved spacetimes
General Relativity and Quantum Cosmology
2009-11-10 v3 Astrophysics
Abstract
We consider the evolution of electromagnetic fields in curved spacetimes and calculate the exact wave equations of the associated electric and magnetic components. Our analysis is fully covariant, applies to a general spacetime and isolates all the sources that affect the propagation of these waves. Among others, we explicitly show how the different parts of the gravitational field act as driving sources of electromagnetic disturbances. When applied to perturbed FRW cosmologies, our results argue for a superadiabatic-type amplification of large-scale cosmological magnetic fields in Friedmann models with open spatial curvature.
Cite
@article{arxiv.gr-qc/0407080,
title = {Electromagnetic fields in curved spacetimes},
author = {Christos G. Tsagas},
journal= {arXiv preprint arXiv:gr-qc/0407080},
year = {2009}
}
Comments
Minor changes, typos corrected. Published version