Stochastic Gravitational Wave Background from Cosmological Supernovae
Résumé
Based on new developments in the understanding of supernovae as gravitational-wave (GW) sources, we estimate the GW background from all cosmic supernovae. While our estimate is uncertain within a few orders of magnitude, this background may become detectable by second-generation space-based interferometers such as the proposed Big-Bang Observatory. At frequencies below about 1 Hz this GW background is stochastic. Down to about 0.01 Hz it could well be of comparable magnitude to the one expected from standard inflationary models, especially in the presence of an early population of massive stars.