Gravitational wave production by collisions: more bubbles

Huber, Stephan J and Konstandin, Thomas (2008) Gravitational wave production by collisions: more bubbles. Journal of Cosmology and Astroparticle Physics, 2008 (9). 022. ISSN 1475-7516

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We re-examine the production of gravitational waves by bubble collisions during a first-order phase transition. The spectrum of the gravitational radiation is determined by numerical simulations using the 'envelope approximation'. We find that the spectrum rises as f3.0 for small frequencies and decreases as f-1.0 for high frequencies. Thus, the fall-off at high frequencies is significantly slower than previously stated in the literature. This result has direct impact on detection prospects for gravity waves originating from a strong first-order electroweak phase transition at space-based interferometers, such as LISA and BBO. In addition, we observe a slight dependence of the peak frequency on the bubble wall velocity.

Item Type: Article
Additional Information: Article Number: 022
Schools and Departments: School of Mathematical and Physical Sciences > Physics and Astronomy
Depositing User: Stephan Huber
Date Deposited: 06 Feb 2012 18:34
Last Modified: 15 Nov 2012 17:06
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