Galactic Magnetic Fields from Superconducting Strings
Astrophysics
2008-11-26 v1
Abstract
We use a simple analytic model for the evolution of currents in superconducting strings to estimate the strength of the `seed' magnetic fields generated by these strings. This model is an extension of the evolution model of Martins and Shellard depending on a parameter which characterizes the importance of equilibration process in the evolution of the currents. For GUT-scale strings, we find that a viable seed magnetic field for the galactic dynamo can be generated if equilibration is weak. On the other hand, electroweak-scale strings originate magnetic fields that are smaller than required.
Cite
@article{arxiv.astro-ph/9706287,
title = {Galactic Magnetic Fields from Superconducting Strings},
author = {C. J. A. P. Martins and E. P. S. Shellard},
journal= {arXiv preprint arXiv:astro-ph/9706287},
year = {2008}
}
Comments
7 pages (latex), 2 .eps files, submitted to Phys.Rev.D