Galactic Magnetic Fields from Superconducting Strings

Details Galactic Magnetic Fields from Superconducting Strings Galactic Magnetic Fields from Superconducting Strings

1997-06-27

arxiv.org/abs/astro-ph/9706287v1

Phys.Rev.D57:5276-5279,1998

Astronomy and Astrophysics

Astrophysics

7 pages (latex), 2 .eps files, submitted to Phys.Rev.D

Scientific paper

10.1103/PhysRevD.57.5276

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 $f$ 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.

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