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An interacting scenario for dark energy in a Bianchi type-I universe


Amirhashchi, Hassan and Qazi, Syed Nasrullah Ali and Zainuddin, Hishamuddin (2014) An interacting scenario for dark energy in a Bianchi type-I universe. Research in Astronomy and Astrophysic, 14 (11). pp. 1383-1392. ISSN 1674-4527

Abstract / Synopsis

We study the interaction between dark energy (DE) and dark matter in the scope of anisotropic Bianchi type-I space-time. First we derive the general form of the DE equation of state (EoS) parameter in both non-interacting and interacting cases and then we examine its future by applying a hyperbolic scale factor. It is shown that in the non-interacting case, depending on the value of the anisotropy parameter K, the DE EoS parameter varies from phantom to quintessence whereas in the interacting case the EoS parameter varies in the quintessence region. However, in both cases, the DE EoS parameter ωde ultimately (i.e. at z = −1) tends to the cosmological constant (ωde = −1). Moreover, we fix the cosmological bound on the anisotropy parameter K by using recent observational data about the Hubble parameter.

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Additional Metadata

Item Type: Article
Divisions: Institute for Mathematical Research
DOI Number: 10.1088/1674-4527/14/11/002
Publisher: Institute of Physics Publishing
Keywords: Cosmology; Bianchi type-I model; Dark energy; Dark matter
Depositing User: Nabilah Mustapa
Date Deposited: 13 Jun 2015 09:43
Last Modified: 01 Sep 2015 11:46
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