Speaker
Elisa Fenu
Description
I will briefly review the current status of magnetic field observations in galaxies and
clusters. These experimental observations can be explained assuming that the primordial
Universe was permeated by a seed magnetic field. Several mechanisms have been proposed to
generate such a primordial field. I will explain how to obtain usefull constraints on the
amplitude of seed magnetic fields by studying their production of gravitational waves:
these upper bounds turn out to be very stringent for both helical and non-helical
primordial magnetic fields.
