Archive ouverte UNIGE | last documents for author 'Philippe Berger'https://archive-ouverte.unige.ch/Latest objects deposited in the Archive ouverte UNIGE for author 'Philippe Berger'engTesting the origin of cosmological magnetic fields through the large-scale structure consistency relationshttps://archive-ouverte.unige.ch/unige:40679https://archive-ouverte.unige.ch/unige:40679We 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.Fri, 03 Oct 2014 16:27:09 +0200