Cosmic magnetic fields from velocity perturbations in the early Universe
General Relativity and Quantum Cosmology
2008-11-26 v2
Abstract
We show, using a covariant and gauge-invariant charged multifluid perturbation scheme, that velocity perturbations of the matter-dominated dust Friedmann-Lemaitre-Robertson-Walker (FLRW) model can lead to the generation of cosmic magnetic fields. Moreover, using cosmic microwave background (CMB) constraints, it is argued that these fields can reach strengths of between 10^{-28} and 10^{-29} G at the time the dynamo mechanism sets in, making them plausible seed field candidates.
Cite
@article{arxiv.gr-qc/0310085,
title = {Cosmic magnetic fields from velocity perturbations in the early Universe},
author = {Gerold Betschart and Peter K. S. Dunsby and Mattias Marklund},
journal= {arXiv preprint arXiv:gr-qc/0310085},
year = {2008}
}
Comments
11 pages, 1 figure, IOP style, minor changes and typos corrected