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Testing the origin of cosmological magnetic fields through the large-scale structure consistency relations

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Published in Journal of Cosmology and Astroparticle Physics. 2014, vol. 052014, no. 025
Abstract We study the symmetries of the post-recombination cosmological magnetohydrodynamical equations which describe the evolution of dark matter, baryons and magnetic fields in a self-consistent way. This is done both at the level of fluid equations and of Vlasov-Poisson-Maxwell equations in phase space. We discuss some consistency relations for the soft limit of the (n+1)-correlator functions involving magnetic fields and matter overdensities. In particular, we stress that any violation of such consistency relations at equal-time would point towards an inflationary origin of the magnetic field.
Keywords Primordial magnetic fieldsMagnetohydrodynamicsDark matter theoryInflation
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BERGER, Philippe, KECHAGIAS, Alexandros, RIOTTO, Antonio Walter. Testing the origin of cosmological magnetic fields through the large-scale structure consistency relations. In: Journal of Cosmology and Astroparticle Physics, 2014, vol. 052014, n° 025. https://archive-ouverte.unige.ch/unige:40679

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Deposited on : 2014-10-03

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