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T1  - Shape of the acoustic gravitational wave power spectrum from a first order phase transition 
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UR  - http://hdl.handle.net/10138/228972 
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A1  - Hindmarsh, Mark; Huber, Stephan J.; Rummukainen, Kari; Weir, David J. 
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PB  -  
Y1  - 2017 
LA  - eng 
AB  - We present results from large-scale numerical simulations of a first order thermal phase transition in the early Universe, in order to explore the shape of the acoustic gravitational wave and the velocity power spectra. We compare the results with the predictions of the recently proposed sound shell model. For the gravitational wave power spectrum, we find that the predicted k(-3) behavior, where k is the wave number, emerges clearly for detonations. The power spectra from deflagrations show sim... 
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KW  - BUBBLE-GROWTH; MAGNETIC-FIELDS; RADIATION; TURBULENCE; DECAY; 114 Physical sciences 
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ER  -