Phase Transition Generated Cosmological Magnetic Field at Large Scales
Cosmology and Nongalactic Astrophysics
2011-01-04 v4 High Energy Physics - Phenomenology
Abstract
We constrain a primordial magnetic field (PMF) generated during a phase transition (PT) using the big bang nucleosynthesis bound on the relativistic energy density. The amplitude of the PMF at large scales is determined by the shape of the PMF spectrum outside its maximal correlation length scale. Even if the amplitude of the PMF at 1 Mpc is small, PT-generated PMFs can leave observable signatures in the potentially detectable relic gravitational wave background if a large enough fraction () of the thermal energy is converted into the PMF.
Keywords
Cite
@article{arxiv.0907.0197,
title = {Phase Transition Generated Cosmological Magnetic Field at Large Scales},
author = {Tina Kahniashvili and Alexander G. Tevzadze and Bharat Ratra},
journal= {arXiv preprint arXiv:0907.0197},
year = {2011}
}
Comments
18 pages, 4 figures, Discussions expanded, references added, ApJ accepted version