Isotropization in spatially homogeneous, two-component cosmological models

Details Isotropization in spatially homogeneous, two-component cosmological models Isotropization in spatially homogeneous, two-component cosmological models

Apr 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986azh....63..209i&link_type=abstract

(Astronomicheskii Zhurnal, vol. 63, Mar.-Apr. 1986, p. 209-213) Soviet Astronomy (ISSN 0038-5301), vol. 30, Mar.-Apr. 1986, p. 1

Astronomy and Astrophysics

Astronomy

Astronomical Models, Cosmology, Homogeneity, Isotropic Media, Spatial Distribution, Collisionless Plasmas, Einstein Equations, Relativistic Plasmas, Vlasov Equations

Scientific paper

The exact solutions of the collisionless Vlasov equation are obtained for anisotropic cosmological models of the I and IX Bianchi types, compatible with Einstein's equations with the energy-momentum tensor of a collisionless gas. On the basis of these solutions the evolution of small perturbations for the space-flat and closed Friedmann models is investigated. It is shown that at the nonrelativistic stage of the expansion of the mixture of ultrarelativistic collisionless gas and a nonrelativistic perfect fluid the interaction of the tensor perturbations with the collisionless component leads to the residual anisotropy of the metric and of the energy-momentum tensor of the collisionless gas.

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