Gravitational wave production by collisions: more bubbles
- Department of Physics and Astronomy, Sussex, Falmer, Brighton BN1 9QH (United Kingdom)
- IFAE, Universitat Autonoma de Barcelona, E-08193 Bellaterra, Barcelona (Spain)
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 f{sup 3.0} for small frequencies and decreases as f{sup -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.
- OSTI ID:
- 22156752
- Journal Information:
- Journal of Cosmology and Astroparticle Physics, Vol. 2008, Issue 09; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 1475-7516
- Country of Publication:
- United States
- Language:
- English
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