Bianchi type III models with anisotropic dark energy View Full Text


Ontology type: schema:ScholarlyArticle      Open Access: True


Article Info

DATE

2010-04

AUTHORS

Özgür Akarsu, Can Battal Kılınç

ABSTRACT

The general form of the anisotropy parameter of the expansion for Bianchi type-III metric is obtained in the presence of a single diagonal imperfect fluid with a dynamically anisotropic equation of state parameter and a dynamical energy density in general relativity. A special law is assumed for the anisotropy of the fluid which reduces the anisotropy parameter of the expansion to a simple form (, where Δ is the anisotropy parameter, H is the mean Hubble parameter and V is the volume of the universe). The exact solutions of the Einstein field equations, under the assumption on the anisotropy of the fluid, are obtained for exponential and power-law volumetric expansions. The isotropy of the fluid, space and expansion are examined. It is observed that the universe can approach to isotropy monotonically even in the presence of an anisotropic fluid. The anisotropy of the fluid also isotropizes at later times for accelerating models and evolves into the well-known cosmological constant in the model for exponential volumetric expansion. More... »

PAGES

763-775

References to SciGraph publications

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  • 2005. 5 Dark Matter and Dark Energy in THE PHYSICS OF THE EARLY UNIVERSE
  • 2008-06. Bianchi type-V perfect fluid space-time models in general relativity in ASTROPHYSICS AND SPACE SCIENCE
  • 2009-02. Bianchi Type V Cosmological Models with Constant Deceleration Parameter in General Relativity in INTERNATIONAL JOURNAL OF THEORETICAL PHYSICS
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  • 2010-01. LRS Bianchi type I models with anisotropic dark energy and constant deceleration parameter in GENERAL RELATIVITY AND GRAVITATION
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  • Journal

    TITLE

    General Relativity and Gravitation

    ISSUE

    4

    VOLUME

    42

    Author Affiliations

    Identifiers

    URI

    http://scigraph.springernature.com/pub.10.1007/s10714-009-0878-7

    DOI

    http://dx.doi.org/10.1007/s10714-009-0878-7

    DIMENSIONS

    https://app.dimensions.ai/details/publication/pub.1020905114


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