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arXiv · astro-ph/9706287

Galactic Magnetic Fields from Superconducting Strings

C. J. A. P. Martins·E. P. S. Shellard
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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 $f$ 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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C. J. A. P. Martins, E. P. S. Shellard. 1997-06-27. Galactic Magnetic Fields from Superconducting Strings. https://doi.org/10.1103/physrevd.57.5276

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