Large-Scale Primordial Magnetic Fields from Inflation and Preheating
Astrophysics
2009-10-31 v1
Abstract
We consider models in which the (transverse) photon mass is non-zero during inflation and drops to zero non-adiabatically at the end of inflation. Through this process, vacuum fluctuations of the photon field are converted into physical, long-wavelength modes with high amplitude. The resulting spectrum of the field strength is approximately B_l ~ 1/l, where l is the relevant coherence scale. With a reasonable model of field evolution we obtain, on comoving galactic scales, a magnetic field strong enough to seed a dynamo mechanism and generate the observed galactic magnetic fields.
Cite
@article{arxiv.astro-ph/0011278,
title = {Large-Scale Primordial Magnetic Fields from Inflation and Preheating},
author = {Ola Tornkvist and Anne-Christine Davis and Konstantinos Dimopoulos and Tomislav Prokopec},
journal= {arXiv preprint arXiv:astro-ph/0011278},
year = {2009}
}
Comments
LaTeX, 4 pages, 1 figure