The very best limits on cosmological magnetic fields
National Institute of Chemical Physics and Biophysics, Rävala 10 10143 Tallinn, Estonia
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Published online: 28 October 2016
I introduce you to the very best limits on cosmological magnetic fields. The numbers: magnetic fields coherent across a Jeans’ length (around 2.4 Mpc today), are bound to be weaker than about 1 nG (2σ statement), whereas for a field as wide as the entire observable Universe the number is approximately 0.5 nG. These limits are obtained from rotation measures data, and as such they do not depend on the epoch at which the fields were generated.
© The Authors, published by EDP Sciences, 2016
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