Cosmic anisotropy with Reduced Relativistic Gas

Abstract

The dynamics of cosmological anisotropies is investigated for Bianchi type I universe filled by a relativistic matter represented by the reduced relativistic gas model (RRG), with equation of state interpolating between radiation and matter. Previously it was shown that the interpolation is observed in the background cosmological solutions for homogeneous and isotropic universe and also for the linear cosmological perturbations. We extend the application of RRG to the Bianchi type I anisotropic model and find that the solutions evolve to the isotropic universe with the pressureless matter contents.

18 pages, 4 figures. Added small Appendix and a few extra references, slightly extended discussion on the possible application of the results. Version accepted in European Journal of Physics C, with LaTeX format modified accordingly

References in corpus (3)

• Induced gravity, and minimally and conformally coupled scalar fields in Bianchi-I cosmological models
• On general features of warm dark matter with reduced relativistic gas
• Cosmological analytic solutions with reduced relativistic gas

Cited by in corpus (7)

• Constraints on self-interacting Bose-Einstein condensate dark matter using large-scale observables
• On general features of warm dark matter with reduced relativistic gas
• Constraints from observational data for a running cosmological constant and warm dark matter with curvature
• Beyond the linear analysis of stability in higher derivative gravity with the Bianchi-I metric
• Theoretical foundations of the reduced relativistic gas in the cosmological perturbed context
• Primordial universe with the running cosmological constant
• Analytical warm dark matter power spectrum on small scales