Viscous generalized Chaplygin gas

Abstract

Viscous GCG(generalized Chaplygin gas) cosmology is discussed, assuming that there is bulk viscosity in the barotropic fluid and GCG. The dynamical analysis indicates that the phase $w_g=-1+\sqrt{3}\gamma \kappa {\tau }_g/(\gamma -\sqrt{3}\kappa {\tau }_{\gamma })$ is a dynamical attractor and the equation of state of GCG approaches it from either $w_g>-1$ or $w_g<-1$ depending on the choice of its initial cosmic density parameter and the ratio of pressure to critical energy density. Obviously, the equation of state $w_g$ can cross the boundary $w_g=-1$. Also, from the point of view of dynamics, the parameters of viscous GCG should be in the range of $\gamma >\sqrt{3}\kappa {\tau }_{\gamma }/(1-\sqrt{3}\kappa {\tau }_g)$ and $0<α<1+\sqrt{3} κγτ_{g}/(γ-\sqrt{3}κτ_γ-\sqrt{3}κγ\t au_{g})$.

8 pages, 5 eps figures, typos corrected

References in corpus (31)

• A Phantom Menace? Cosmological consequences of a dark energy component with super-negative equation of state
• Cosmological Constant - the Weight of the Vacuum
• An alternative to quintessence
• Phantom Energy and Cosmic Doomsday
• Essentials of k-essence
• Properties of singularities in (phantom) dark energy universe
• Unification of Dark Matter and Dark Energy: the Inhomogeneous Chaplygin Gas
• Can dark energy evolve to the Phantom?
• Sudden Future Singularities
• The State of the Dark Energy Equation of State
• The end of unified dark matter?
• Generalized Chaplygin gas and CMBR constraints
• Constraints on the generalized Chaplygin gas from supernovae observations
• New Isotropic and Anisotropic Sudden Singularities
• Can codimension-two branes solve the cosmological constant problem?
• Phantom-like GCG and the constraints of its parameters via cosmological dynamics
• Phantom with Born-Infield type Lagrangian
• Phantom Field with O(N) Symmetry in Exponential Potential
• Smooth dynamical (de)-phantomization of a scalar field in simple cosmological models
• On the Cardy-Verlinde Entropy Formula in Viscous Cosmology
• Dark energy transition between quintessence and phantom regimes - an equation of state analysis
• Born-Infeld-type phantom on the brane world
• CMBR Constraint on a Modified Chaplygin Gas Model
• Viscous Bianchi type I universes in brane cosmology
• O(N) quintessence
• Dynamics of Quintessence with Thermal Interactions
• Stability of FRW Cosmology with Generalized Chaplygin Gas
• Skewness as a test for Quartessence
• Open static Chaplygin universe
• Heteroclinic orbit and tracking attractor in cosmological model with a double exponential potential
• Exponential Cardassian Universe

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• Constraining Cosmological Parameters with Viscous Modified Chaplygin Gas and Generalized Cosmic Chaplygin Gas Models in Horava-Lifshitz Gravity: Utilizing Late-time Datasets
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