Abstract
Observations show that our galaxy, and a good number of other spirals, possess magnetic fields with magnitude B ∼ 10-6 G, on scales of several kiloparsecs (see [1] and references therein). No magnetic fields have been observed on larger scales, current observational bounds being about B < 10-9 G. The large coherence scales of these fields means that it is difficult to find mechanisms capable of creating them. Here we discuss the possibility of the galactic magnetic fields being generated by superconducting [2] cosmic strings, based on the quantitative evolution model of Martins and Shellard [3, 4], and a simple ‘toy model’ for the evolution of the superconducting currents [2].
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References
C. J. A. P. Martins & E. P. S. Shellard, ‘Galactic Magnetic Fields from Superconducting Strings’, submitted to Phys. Rev. D.
C. J. A. P. Martins & E. P. S. Shellard, ‘Evolution of Superconducting String Currents’, Phys. Lett. B, in press (1997).
C. J. A. P. Martins & E. P. S. Shellard, Phys. Rev. D53, 575 (1996).
C. J. A. P. Martins & E. P. S. Shellard, Phys. Rev. D54, 2535 (1996).
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© 1999 Springer Science+Business Media Dordrecht
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Martins, C.J.A.P., Shellard, E.P.S. (1999). Superconducting Strings and Magnetic Fields. In: Lago, M.T.V.T., Blanchard, A. (eds) The Non-Sleeping Universe. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-4497-1_77
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DOI: https://doi.org/10.1007/978-94-011-4497-1_77
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