Axially Symmetric Cosmological Models with Perfect Fluid and Cosmological Constant

Details Axially Symmetric Cosmological Models with Perfect Fluid and Cosmological Constant Axially Symmetric Cosmological Models with Perfect Fluid and Cosmological Constant

1998-01-13

arxiv.org/abs/astro-ph/9801117v3

Astrophys.Space Sci.261:299-300,1999

Astronomy and Astrophysics

Astrophysics

8 pages, 5 figures; Extended version of a paper to appear in Proceedings of NON-SLEEPING UNIVERSE Conference

Scientific paper

10.1023/A:1002071910713

Following recent considerations of a non-zero value for the vacuum energy density and the realization that a simple Kantowski-Sachs model might fit the classical tests of cosmology, we study the qualitative behavior of three anisotropic and homogeneous models: Kantowski-Sachs, Bianchi I and Bianchi III universes, with dust and cosmological constant, in order to find out which are physically permitted. In fact, these models undergo isotropisation, except for the Kantowski-Sachs model (Omega_{k_{0}}>0) with Omega_{Lambda_{0}}< Omega_{Lambda_{M}} and for the Bianchi III (Omega_{k_{0}}<0) with Omega_{Lambda_{0}}

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