期刊
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
卷 -, 期 9, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1475-7516/2008/09/022
关键词
cosmological phase transitions; gravity waves/theory
资金
- STFC [ST/G000573/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/G000573/1] Funding Source: researchfish
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(3.0) 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.
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