General Relativity and Gravitation

, Volume 16, Issue 7, pp 609–624 | Cite as

Isotropic singularities and isotropization in a class of Bianchi type-VI h cosmologies

  • J. Wainwright
  • P. J. Anderson
Research Articles
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Abstract

The evolution of a class of exact spatially homogeneous cosmological models of Bianchi type VI h is discussed. It is known that solutions of type VI h cannot approach isotropy asymptotically at large times. Indeed the present class of solutions become asymptotic to an anisotropic vacuum plane wave solution. Nevertheless, for these solutions the initial anisotropy can decay, leading to a stage of finite duration in which the model is close to isotropy. Depending on the choice of parameters in the solution, this quasi-isotropic stage can commence at the initial singularity, in which case the singularity is of the type known as “isotropic” or “Friedmann-like.” The existence of this quasi-isotropic stage implies that these models can be compatible in principle with the observed universe.

Keywords

Anisotropy Plane Wave Isotropy Large Time Differential Geometry 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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Copyright information

© Plenum Publishing Corporation 1984

Authors and Affiliations

  • J. Wainwright
    • 1
  • P. J. Anderson
    • 1
  1. 1.Department of Applied MathematicsUniversity of WaterlooWaterlooCanada

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