Observational constraints on emergent universe model with non-linear viscous fluid

Observational constraints on emergent universe model with non-linear viscous fluid

A flat emergent universe (EU) with a non-linear equation of state ( p = A ρ + f ( ρ ) ) is studied considering bulk viscosity. In the paper we obtain cosmological models with viscous fluid described by truncated Israel–Stewart theory. Using autonomous system of field equations the stability of the s...

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Bibliographic Details
Published in:General relativity and gravitation Vol. 51; no. 6; pp. 1 - 17
Main Authors: Paul, B. C., Chanda, A.
Format: Journal Article
Language:English
Published: New York Springer US 01-06-2019
Springer Nature B.V
Subjects:
Astronomical models
Astronomy
Astrophysics and Cosmology
Classical and Quantum Gravitation
Constraint modelling
Cosmology
Differential Geometry
Equations of state
Gravity
Linear equations
Mathematical and Computational Physics
Nonlinear equations
Physics
Physics and Astronomy
Quantum Physics
Relativity Theory
Research Article
Stability analysis
Theoretical
Universe
Viscosity
Viscous fluids
Viscosity
Non-linear equation of state
Emergent universe
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Description
Summary:A flat emergent universe (EU) with a non-linear equation of state ( p = A ρ + f ( ρ ) ) is studied considering bulk viscosity. In the paper we obtain cosmological models with viscous fluid described by truncated Israel–Stewart theory. Using autonomous system of field equations the stability of the solutions are analyzed. The observational constraints on the model parameters are determined for different matter energy compositions of the universe with non-linear viscosity in the EU scenario.
ISSN:0001-7701
1572-9532
DOI:10.1007/s10714-019-2551-0