Bulk viscous L.R.S. Bianchi type V tilted stiff fluid cosmological model in general relativity
Raj Bali,Pramila Kumawat +1 more
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TLDR
In this paper, a locally rotationally symmetric (L.R.S.) Bianchi type V bulk viscous tilted stiff fluid cosmological model is investigated and the behaviour of the model in presence and absence of bulk viscosity and singularities in the model is discussed.About:
This article is published in Physics Letters B.The article was published on 2008-07-31 and is currently open access. It has received 48 citations till now. The article focuses on the topics: Volume viscosity & Gravitational singularity.read more
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Locally rotationally symmetric Bianchi type I cosmology in f(R, T) gravity
TL;DR: In this article, the exact solutions of locally rotationally symmetric Bianchi type I spacetime were explored and physical quantities were calculated in each case, where the modified field equations were solved by assuming an expansion scalar that is proportional to the shear scalar.
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Dynamics of Bianchi I universe with magnetized anisotropic Dark Energy
Muhammad Sharif,Muhammad Zubair +1 more
TL;DR: In this article, the Bianchi type I cosmological model in the presence of magnetized anisotropic dark energy was studied and exact solutions to the field equations were obtained using the condition that expansion is proportional to the shear scalar.
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Bulk Viscous LRS Biachi-I Universe with variable $G$ and decaying $\Lambda$
TL;DR: In this paper, a spatially homogeneous and totally anisotropic locally rotationally symmetric (LRS) Bianchi type I cosmological model with variable $G$ and $Lambda$ in presence of imperfect fluid is presented.
Journal ArticleDOI
Bulk viscous LRS Bianchi-I Universe with variable G and decaying Λ
TL;DR: In this article, a spatially homogeneous and totally anisotropic locally rotationally symmetric (LRS) Bianchi type I cosmological model with variable G and Λ in presence of imperfect fluid is presented.
Journal ArticleDOI
Cosmological evolution for dark energy models in f(T) gravity
Muhammad Sharif,Sehrish Azeem +1 more
TL;DR: In this paper, the behavior of state parameter and energy density for dark energy in the framework of f(T ) gravity was investigated and it was shown that the universe takes a transition between phantom and non-phantom phases for all models except exponential and logarithmic models.
References
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Cosmological constant—the weight of the vacuum
TL;DR: A review of cosmological constants can be found in this paper, where the authors discuss several aspects of the Cosmological Constant problem from both cosmology and theoretical perspectives.
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The Case for a Positive Cosmological Λ-Term
TL;DR: In this article, the authors review both observational and theoretical aspects of a small cosmological Λ-term and discuss the current observational situation focusing on cosmology tests of Λ including the age of the universe, high redshift supernovae, gravitational lensing, galaxy clustering and the cosmic microwave background.
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The Isotropy of the universe
TL;DR: Einstein equations with flat homogeneous hypersurfaces including effects of viscosity in radiation and anisotropic pressures were studied in this paper, where the authors considered flat hypersurface models with flat surfaces.
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The deflationary universe: An instability of the de Sitter universe
TL;DR: In this paper, it is shown that the no hair conjecture fails even in isotropic cosmological models if the strong energy conditions is relaxed, and the relevance of the initial value structure of the cosmology problem for inflationary explanations of its present structure is discussed.
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