Gravitational waves from the sound of a first order phase transition

Hindmarsh, Mark, Huber, Stephan J, Rummukainen, Kari and Weir, David J (2014) Gravitational waves from the sound of a first order phase transition. Physical Review Letters (PRL), 112 (4). 041301. ISSN 0031-9007

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We report on the first three-dimensional numerical simulations of first-order phase transitions in the early Universe to include the cosmic fluid as well as the scalar field order parameter. We calculate the gravitational wave (GW) spectrum resulting from the nucleation, expansion, and collision of bubbles of the low-temperature phase, for phase transition strengths and bubble wall velocities covering many cases of interest. We find that the compression waves in the fluid continue to be a source of GWs long after the bubbles have merged, a new effect not taken properly into account in previous modeling of the GW source. For a wide range of models, the main source of the GWs produced by a phase transition is, therefore, the sound the bubbles make.

Item Type: Article
Schools and Departments: School of Mathematical and Physical Sciences > Physics and Astronomy
Subjects: Q Science > QC Physics
Depositing User: Catrina Hey
Date Deposited: 12 Aug 2014 15:53
Last Modified: 07 Mar 2017 05:56

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Project NameSussex Project NumberFunderFunder Ref
Particle Physics Theory at Royal Holloway and SussexG0742STFC-SCIENCE AND TECHNOLOGY FACILITIES COUNCILST/J000477/1