Natural generation and amplification of magnetic seed fields |
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| Authors: | P K S Dunsby G Betschart C Zunckel |
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| Institution: | (1) Department of Mathematics and Applied Mathematics, University of Cape Town, 7701 Rondebosch, South Africa;(2) South African Astronomical Observatory, Observatory 7925, Cape Town, South Africa |
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| Abstract: | We show, using a covariant and gauge– invariant approach to cosmological perturbation theory, that velocity and gravitational wave perturbations of the Friedmann– Lemaître– Robertson– Walker (FLRW) model can lead to the generation and amplification of cosmic magnetic fields. It is argued that under certain conditions these fields can reach strengths capable of supporting the galactic dynamo mechanism. |
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| Keywords: | Cosmological perturbation theory |
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