Spectrum of gravitational radiation from primordial turbulence

By G. Gogoberidze, T. Kahniashvili, A. Kosowsky. 2007

177 citations recorded by the source corpus.

Energy injection into the early universe can induce turbulent motions of the primordial plasma, which in turn act as a source for gravitational radiation. Earlier work computed the amplitude and characteristic frequency of the relic gravitational wave background, as a function of the total energy injected and the stirring scale of the turbulence. This paper computes the frequency spectrum of relic gravitational radiation from a turbulent source of the stationary Kolmogoroff form which acts for a given duration, making no other approximations. We also show that the limit of long source wavelengths, commonly employed in aeroacoustic problems, is an excellent approximation. The gravitational waves from cosmological turbulence around the electroweak energy scale will be detectable by future space-based laser interferometers for a substantial range of turbulence parameters.

Subfields: Astronomy and Astrophysics

View Paper: https://www.semanticscholar.org/paper/a779f00594ed29564763d430477452da4bb0ec0e

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In Astronomy and Astrophysics

Citations in the corpus

Detecting gravitational waves from cosmological phase transitions with LISA: an update (2019, background): “A direct consequence of this assumption is that the GW power spectrum changes slope at frequencies higher than H∗, absent in [58].”
Gravitational waves from first order cosmological phase transitions in the Sound Shell Model (2019, background): “of turbulence [21, 22, 51].”
Science case for the Einstein telescope (2019, background): “ic background of GWs may be generated from a period of turbulence in the early Universe, which might arise for the evolution of primordial magnetic elds coupled to the highly conducting magnetic elds [223]. The detection of a weak cosmological background requires the removal of the astrophysical for”
Gravitational wave energy budget in strongly supercooled phase transitions (2019, background): “We stress that while our treatment is clearly very simplified and more study of the turbulence contribution is necessary [63–66], it indicates that in general turbulence will play a much more important role compared to sound waves than previously thought.”
Cosmological backgrounds of gravitational waves and eLISA/NGO: phase transitions, cosmic strings and other sources (2012, methodology): “This problem persists also in the analysis of Gogoberidze et al. 2007 [32], which keeps the assumption of stationarity of the source, but corrects the problem of the dispersion relation.”