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Early Universe evolution in presence of magnetic fields
Author(s) -
Delgado Gaspar I.,
Pérez Martínez A.,
Piccinelli G.,
Sussman R. A.
Publication year - 2015
Publication title -
astronomische nachrichten
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.394
H-Index - 63
eISSN - 1521-3994
pISSN - 0004-6337
DOI - 10.1002/asna.201512219
Subject(s) - physics , universe , friedmann–lemaître–robertson–walker metric , anisotropy , positron , neutrino , dark matter , electron , magnetic field , astrophysics , equation of state , particle physics , quantum mechanics
We analyse the evolution of a magnetised Universe in a stage between the leptonic era and the beginning of the radiationdominated epoch using an anisotropic BianchiI model. In our description the cosmic fluid is made of primordial radiation, neutrinos, magnetic field, non‐interacting already decoupled dark matter (WIMPS), baryons, electrons, and positrons. The interaction of the field with the electron‐positron gas is taken into account, resulting in anisotropic equations of state for these constituents. Numerical simulations reveal some differences between the behaviour of magnetised BianchiI Universes and that of first order perturbations on an FLRW background. (© 2015 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)