Superadiabatic-type magnetic amplification in conventional cosmology

Details Superadiabatic-type magnetic amplification in conventional cosmology Superadiabatic-type magnetic amplification in conventional cosmology

2005-04-05

arxiv.org/abs/astro-ph/0504089v3

Phys.Rev. D71 (2005) 123506

Astronomy and Astrophysics

Astrophysics

Minor changes. Published version

Scientific paper

10.1103/PhysRevD.71.123506

We consider the evolution of cosmological magnetic fields in FRW models and outline a geometrical mechanism for their superadiabatic amplification on large scales. The mechanism operates within standard electromagnetic theory and applies to FRW universes with open spatial sections. We discuss the general relativistic nature of the effect and show how it modifies the adiabatic magnetic evolution. Assuming a universe that is only marginally open today, we estimate the main features of the superadiabatically amplified residual field.

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