Picogauss magnetic fields in voids from ultra-high energy cosmic rays

Details Picogauss magnetic fields in voids from ultra-high energy cosmic rays Picogauss magnetic fields in voids from ultra-high energy cosmic rays

2012-01-20

arxiv.org/abs/1201.4371v2

Astronomy and Astrophysics

Astrophysics

High Energy Astrophysical Phenomena

The paper is withdrawn because the proposed mechanism does not work. Thanks to Francesco Miniati who pointed out the loophole

Scientific paper

We argue that ultra-high energy cosmic rays emitted by galaxy clusters result in electric currents in filaments of the large-scale structure that are sufficient to generate magnetic fields in voids of the magnitude of ~1e-12 G and the coherence length of up to tens of Mpc. These fields satisfy both the lower and upper observational bounds on magnetic fields in voids without a need of any primordial component.

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