CMB limits on large-scale magnetic fields in an inhomogeneous universe
Astrophysics
2017-08-23 v2 General Relativity and Quantum Cosmology
Abstract
We use the cosmic microwave background temperature anisotropy to place limits on large-scale magnetic fields in an inhomogeneous (perturbed Friedmann) universe. If no assumptions are made about the spacetime geometry, only a weak limit can be deduced directly from the CMB. In the special case where spatial inhomogeneity is neglected to first order, the upper limit is much stronger, i.e. a few nano-G
Keywords
Cite
@article{arxiv.astro-ph/0208364,
title = {CMB limits on large-scale magnetic fields in an inhomogeneous universe},
author = {C. A. Clarkson and A. A. Coley and R. Maartens and C. G. Tsagas},
journal= {arXiv preprint arXiv:astro-ph/0208364},
year = {2017}
}
Comments
9 pages, 1 figure; uses iopart.cls; v2 has minor changes to match version to be published in in Class. Quantum Grav