Trevor Stevens

West Virginia Wesleyan College

Gravitational Radiation from Phase Transitions

Astro Lunch Seminar, Friday, May 8, 2009
12:00 PM, Wean Hall 8327, CMU

Abstract:

We study gravitational waves generated by the cosmological magnetic fields induced via bubble collisions during the electroweak and phase transitions. Our derivation of magnetic fields produced in bubble collisions is based on the use of the fundamental MSSM EW and QCD Lagrangians. The GWs spectrum is obtained using magnetohydrodynamic (MHD) turbulence model. We find that the EWPT GWs stain amplitude peaks at frequency order of 1-2 mHz being order of $10^{-20}-10^{-21}$ and thus the signal is possibly detectable by Laser Interferometer Space Antenna (LISA). On the other hand, the GW signal is outside the LISA sensitivity curve.