Accelerating Dark Energy Cosmological Model in Two Fluid with Hybrid Scale Factor
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In this article, the authors investigated the anisotropic behavior of the accelerating universe in Bianchi V space time in the frame work of General Relativity (GR), where the matter field is of two non interacting fluids i.e. the usual string fluid and dark energy (DE) fluid.Abstract:
In this paper, we have investigated the anisotropic behavior of the accelerating universe in Bianchi V space time in the frame work of General Relativity (GR). The matter field we have considered is of two non interacting fluids i.e. the usual string fluid and dark energy (DE) fluid. In order to represent the pressure anisotropy, the skewness parameters are introduced along three different spatial directions. To achieve a physically realistic solutions to the field equations, we have considered a scale factor, known as hybrid scale factor, which is generated by a time varying deceleration parameter. This simulates a cosmic transition from early deceleration to late time acceleration. It is observed that the string fluid dominates the universe at early deceleration phase but does not affect nature of cosmic dynamics substantially at late phase where as, the DE fluid dominates the universe in present time, which is in accordance with the observations results. Hence, we analysed here the role of two fluids in the transitional phases of universe with respect to time which depicts the reason behind the cosmic expansion and DE. The role of DE with variable equation of state parameter (EoS), skewness parameters also discussed along with physical and geometrical properties.read more
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Journal ArticleDOI
Dark energy cosmological models with general forms of scale factor
TL;DR: In this article, the role of anisotropy in the evolution of dark energy was studied in an anisotropic Bianchi-V space-time and three general forms of scale factor were considered to obtain a deterministic solution.
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Bulk viscous embedded hybrid dark energy models
TL;DR: In this paper, the cosmological model of the universe in a two-fluid environment with a newly developed mathematical formalism was constructed, in which Binachi type V (BV) space time is considered with a time varying deceleration parameter.
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Analysis of general relativistic hydrodynamic cosmological models with stability factor in theories of gravitation
S. H. Shekh,V. R. Chirde +1 more
TL;DR: In this article, the dynamical properties of Einstein's field equations in cosmology and in the vicinity of a plane symmetric cosmological model are analyzed and some physical and kinematical properties of the models are also discussed.
Journal ArticleDOI
Bulk viscous embedded hybrid dark energy models
TL;DR: In this paper, the cosmological model of the universe in a two fluids environment with a newly developed mathematical formalism is constructed, and a general form of skewness parameters is also obtained as a functional form of the scale factor.
Journal ArticleDOI
Accelerating Bianchi type dark energy cosmological model with cosmic string in $f(T)$ gravity
S. H. Shekh,V. R. Chirde +1 more
TL;DR: In this article, anisotropic accelerating Bianchi type-I cosmological model in the presence of two noninteracting fluids, i.e. one usual string and other dark energy fluid towards the gravitational field equations for the linear form of gravity, where $T$ be the torsion.
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Measurements of Omega and Lambda from 42 High-Redshift Supernovae
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Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant To Appear in the Astronomical Journal
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Five-year wilkinson microwave anisotropy probe observations: cosmological interpretation
Eiichiro Komatsu,Jo Dunkley,Jo Dunkley,M. R. Nolta,Charles L. Bennett,B. Gold,Gary Hinshaw,N. Jarosik,Davin Larson,Michele Limon,Lyman A. Page,David N. Spergel,Mark Halpern,Robert S. Hill,Alan J. Kogut,S. S. Meyer,Gregory S. Tucker,Janet Weiland,Edward J. Wollack,Edward L. Wright +19 more
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