Lorentz Symmetry Violation and Galactic Magnetism

Details Lorentz Symmetry Violation and Galactic Magnetism Lorentz Symmetry Violation and Galactic Magnetism

2008-05-13

arxiv.org/abs/0805.1851v2

Phys.Lett.B680:125-128,2009

Astronomy and Astrophysics

Astrophysics

5 pages, minor revisions, version published in Phys. Lett. B

Scientific paper

10.1016/j.physletb.2009.08.041

We analyze the generation of primordial magnetic fields during de Sitter inflation in a Lorentz-violating theory of Electrodynamics containing a Chern-Simons term which couples the photon to an external four-vector. We find that, for appropriate magnitude of the four-vector, the generated field is maximally helical and, through an inverse cascade caused by turbulence of primeval plasma, reaches at the time of protogalactic collapse an intensity and correlation length such as to directly explain galactic magnetism.

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