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Isotropization of two-component fluids

Martin Goliath·Ulf S. Nilsson
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Abstract

We consider the problem of late-time isotropization in spatially homogeneous but anisotropic cosmological models when the source of the gravitational field consists of two non-interacting perfect fluids -- one tilted and one non-tilted. In particular, we study irrotational Bianchi type V models. By introducing appropriate dimensionless variables, a full global understanding of the state space of the gravitational field equations becomes possible. The issue of isotropization can then be addressed in a simple fashion. We also discuss implications for the cosmic ``no-hair'' theorem for Bianchi models when part of the source is a tilted fluid.

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Martin Goliath, Ulf S. Nilsson. 2000-06-20. Isotropization of two-component fluids. https://doi.org/10.1063/1.1289829

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