Non-linear effects on primoridal magnetic field generation

Series: 
The London Relativity and Cosmology Seminar
Speaker: 
Ellie Nalson (QMUL)
Date: 
February 26th, 2014 at 16:30
Room: 
Maths 103
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.