Series: The London Relativity and Cosmology Seminar
Speaker: Ellie Nalson (QMUL)
Abstract: Magnetic fields are present on all scales in the Universe and recently have even been found within voids in the large scale structure. At present there is no single "natural" mechanism to generate the initial seed fields needed to produce these inter-galactic magnetic fields. We start by reviewing the main possible generation mechanisms. Then by using fully relativistic cosmological perturbation theory we show analytically how magnetic fields can be generated. We present the amplitude and scale dependence one would expect from such a generation mechanism.