Viscous dissipation and evolution of homogeneous cosmological models

2008 ◽  
pp. 81-112 ◽  
Author(s):  
Niccoló Caderni
Keyword(s):  
Viscous Dissipation ◽  
Cosmological Models ◽  
Homogeneous Cosmological Models

Hypersurface-homogeneous cosmological models with dynamical equation of state parameter in Lyra geometry

2015 ◽  
Vol 93 (10) ◽  
pp. 1100-1105 ◽  
Author(s):  
Shri Ram ◽  
S. Chandel ◽  
M.K. Verma
Keyword(s):  
Dynamical Equation ◽  
State Parameter ◽  
Lyra Geometry ◽  
Cosmological Models ◽  
Anisotropic Fluid ◽  
Late Time ◽  
Field Equations ◽  
Homogeneous Cosmological Models ◽  
Negative Constant ◽  
Equation Of State Parameter

The hypersurface homogeneous cosmological models are investigated in the presence of an anisotropic fluid in the framework of Lyra geometry. Exact solutions of field equations are obtained by applying a special law of variation for mean Hubble parameter that gives a negative constant value of the deceleration parameter. These solutions correspond to anisotropic accelerated expanding cosmological models that isotropize for late time even in the presence of anisotropic fluid. The anisotropy of the fluid also isotropizes at late time. Some physical and kinematical properties of the model are also discussed.

Homogeneous Cosmological Models and New Inflation

1986 ◽  
Vol 57 (17) ◽  
pp. 2237-2240 ◽  
Author(s):  
Michael S. Turner ◽  
Lawrence M. Widrow
Keyword(s):  
Cosmological Models ◽  
Homogeneous Cosmological Models
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