Turbulence in Cosmology. II: The Asymptotic Effect of Collective Excitations on the Cosmological Expansion of the Homogeneous and Isotropic, on the Average, Universe

Details Turbulence in Cosmology. II: The Asymptotic Effect of Collective Excitations on the Cosmological Expansion of the Homogeneous and Isotropic, on the Average, Universe Turbulence in Cosmology. II: The Asymptotic Effect of Collective Excitations on the Cosmological Expansion of the Homogeneous and Isotropic, on the Average, Universe

May 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975ap%26ss..34..281m&link_type=abstract

Astrophysics and Space Science, Volume 34, Issue 2, pp.281-295

Astronomy and Astrophysics

Astrophysics

10

Scientific paper

At the stage of a weak turbulence the interactions between excitations are negligible, and potential, vortical and gravitational perturbations may be considered independent. In this approximation the analytical solutions to exact equations of the turbulence theory are found. It is shown that only such excitations whose effective equations of state do not coincide with those of matter do contribute to the deviation from the Friedmann law. At the stagep=1/3ɛ this involves potential and vortical turbulences. A model of the Universe from gravitational waves is constructed. The influence of the turbulence on the course of the expansion is essential till the beginning of, and probably during, the synthesis of light elements. The rate of cosmological expansion and gravitational instability decreases if the potential turbulence predominates over the vortical one, and increases in the opposite case.

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