Gravitational Radiation From Cosmological Turbulence
Abstract
An injection of energy into the early Universe on a given characteristic length scale will result in turbulent motions of the primordial plasma. We calculate the stochastic background of gravitational radiation arising from a period of cosmological turbulence, using a simple model of isotropic Kolmogoroff turbulence produced in a cosmological phase transition. The resulting gravitational radiation has a maximum amplitude comparable to the radiation background from the collision of bubbles in a first-order phase transition, but at a lower frequency. Generally, turbulence from a phase transition is less easily detected than the bubble collisions producing the turbulence, in contrast to previous estimates.Keywords
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