Gravitational Waves (and Non-Gaussianity) from Cosmic Defects. A Universal Result.

by Daniel Figueroa (University of Geneva)

Wednesday 7 Nov 2012, 11:30 → 12:30 Europe/Zurich

4/2-011 - TH common room (CERN)

We will show that a scale-invariant background of gravitational waves is always generated during the evolution of a network of cosmic defects in scaling regime. This is a universal result, independent of the nature of the defects (domain walls, strings, monopoles, textures, etc), and independent of the type of phase transition (1st order, 2nd order, cross-over) at which the defects are created. It is just a consequence of scaling, which ultimately is due to causality. If there is enough time, we will also discuss about Non-Gaussianity from cosmic defects.