Primordial Magnetic Fields From String Cosmology
High Energy Physics - Theory
2009-10-28 v1 Astrophysics
General Relativity and Quantum Cosmology
Abstract
Sufficiently large seeds for generating the observed (inter)galactic magnetic fields emerge naturally in string cosmology from the amplification of electromagnetic vacuum fluctuations due to a dynamical dilaton background. The success of the mechanism depends crucially on two features of the so-called pre-big-bang scenario, an early epoch of dilaton-driven inflation at very small coupling, and a sufficiently long intermediate stringy era preceding the standard radiation-dominated evolution.
Cite
@article{arxiv.hep-th/9504083,
title = {Primordial Magnetic Fields From String Cosmology},
author = {M. GasperinI and M. Giovannini and G. Veneziano},
journal= {arXiv preprint arXiv:hep-th/9504083},
year = {2009}
}
Comments
12 pages, latex, two figures available by fax upon request