Université de GenèveDépartement de Physique ThéoriqueCAP Genève

Testing the Origin of Cosmological Magnetic Fields through the Large-Scale Structure Consistency Relations

5. February 2014
Cite as: 
P. Berger, A. Kehagias, A. Riotto [arXiv:1402.1044].

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 suchconsistency relations at equal-time would point towards an inflationary origin of the magnetic field.


Département de Physique Théorique
Université de Genève
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