# Numerical simulations of acoustically generated gravitational waves at a first order phase transition

@article{Hindmarsh2015NumericalSO, title={Numerical simulations of acoustically generated gravitational waves at a first order phase transition}, author={Mark Hindmarsh and Stephan J. Huber and Kari Rummukainen and David J. Weir}, journal={Physical Review D}, year={2015}, volume={92}, pages={123009} }

We present details of numerical simulations of the gravitational radiation produced by a first order thermal phase transition in the early universe. We confirm that the dominant source of gravitational waves is sound waves generated by the expanding bubbles of the low-temperature phase. We demonstrate that the sound waves have a power spectrum with a power-law form between the scales set by the average bubble separation (which sets the length scale of the fluid flow Lf) and the bubble wall…

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