Effect of density fluctuations on the expansion of the universe far from the singularity

Details Effect of density fluctuations on the expansion of the universe far from the singularity Effect of density fluctuations on the expansion of the universe far from the singularity

Jan 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977svphj..20....1p&link_type=abstract

Soviet Physics Journal, Volume 20, Issue 1, pp.1-4

Physics

Scientific paper

The effect of fluctuations in the density of matter on the expansion of the universe far from the singularity is analyzed on the basis of a model with a three-dimensional space which is homogeneous and isotropie on the average. The fluctuations reduce the gravitational effect, retarding the expansion. This effect of the fluctuations increases as the expansion proceeds and can strongly affect the expansion velocity. An equation is derived for the age of the universe on the basis of this model. The age is expressed in terms of observable quantities: the Hubble constant and the acceleration parameter. It is shown that fluctuations lead to an increase in this age. It is concluded that fluctuations must be taken into account in studying the expansion of the observable universe.

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