Speaker
Simona Procacci
(U. Geneva)
Description
Gravitational waves are naturally sourced by hydrodynamical fluctuations in a thermal medium, as the one that filled the universe before recombination. Since the corresponding gravitational wave spectrum is expected to show rapid growth at high frequencies, f ∼ 1...1000 Hz, unprecedented prospects to detect these signals may be offered by the proposed Einstein Telescope. While the spectral shape is well understood, the peak amplitude is set by the plasma temperature at emission. We present a model-independent numerical method to estimate an upper bound for the maximal temperature reached after inflation and discuss the validity of the formalism across possible scale hierarchies.
Primary authors
Helena Kolesova
Mikko Laine
Simona Procacci
(U. Geneva)
