Early Universe evolution in presence of magnetic fields. Issue 8 (November 2015)

• Record Type: Journal Article
• Authors: Delgado Gaspar, I.; Pérez Martínez, A.; Piccinelli, G.; Sussman, R. A.
• Is Part Of: Astronomische Nachrichten. Volume 336:Issue 8/9(2015)
• Page Start: 800
• Page End: 804
• Publication Date: 2015-11
• Subjects: early universe -- equation of state -- magnetic fields; Astronomy -- Periodicals; 520.5
• DOI: 10.1002/asna.201512219
• Languages: English
• ISSNs: 0004-6337

Abstract

Abstract: 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)