Viscous Generalized Chaplygin Gas as a Unified Dark Fluid: Including Perturbation of Bulk Viscosity

Abstract

In this paper, we continue our previous work of studying viscous generalized Chaplygin gas (VGCG) as a unified dark fluid but including the bulk viscosity perturbation. By using the currently available cosmic observational data from SNLS3, BAO, HST and recently released Planck, we gain the constraint on bulk viscosity coefficient: ${\zeta }_0=0.0000138_{-0.0000105-0.0000138-0.0000138}^{+0.00000614+0.0000145+0.0000212}$ in $1,2,3\sigma$ regions respectively via Markov Chain Monte Carlo method. The result shows that when considering perturbation of bulk viscosity, the currently cosmic observations favor a smaller bulk viscosity coefficient.

References in corpus (36)

• Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
• Measurements of Omega and Lambda from 42 High-Redshift Supernovae
• Wilkinson Microwave Anisotropy Probe (WMAP) Three Year Results: Implications for Cosmology
• Type Ia Supernova Discoveries at z>1 From the Hubble Space Telescope: Evidence for Past Deceleration and Constraints on Dark Energy Evolution
• Cosmological parameters from SDSS and WMAP
• Cosmological parameters from CMB and other data: a Monte-Carlo approach
• An alternative to quintessence
• The Supernova Legacy Survey: Measurement of Omega_M, Omega_Lambda and w from the First Year Data Set
• Generalized Chaplygin Gas, Accelerated Expansion and Dark Energy-Matter Unification
• Cosmological Perturbation Theory in the Synchronous and Conformal Newtonian Gauges
• Cosmological Perturbation Theory in the Synchronous vs. Conformal Newtonian Gauge
• Cosmological Results from High-z Supernovae
• A Redetermination of the Hubble Constant with the Hubble Space Telescope from a Differential Distance Ladder
• Can the Chaplygin gas be a plausible model for dark energy?
• Big-Bang Nucleosynthesis Predictions for Precision Cosmology
• The end of unified dark matter?
• Structure Formation with Generalized Dark Matter
• Cosmic anti-friction and accelerated expansion
• Density perturbations in an Universe dominated by the Chaplygin gas
• Does Bulk Viscosity Create a Viable Unified Dark Matter Model?
• Bulk Viscous Cosmology
• Bulk viscosity driving the acceleration of the Universe
• Examining the evidence for dynamical dark energy
• Gauge-ready formulation of the cosmological kinetic theory in generalized gravity theories
• Gauge-invariant analysis of perturbations in Chaplygin gas unified models of dark matter and dark energy
• Revisiting Generalized Chaplygin Gas as a Unified Dark Matter and Dark Energy Model
• Curvature force and dark energy
• Stability properties of some perfect fluid cosmological models
• Entropy perturbations in quartessence Chaplygin models
• Observational Constraints to Ricci Dark Energy Model by Using: SN, BAO, OHD, fgas Data Sets
• Observational Constraints on Silent Quartessence
• Chaplygin gas with non-adiabatic pressure perturbations
• Unified Dark Fluid with Constant Adiabatic Sound Speed and Cosmic Constraints
• Matter Power Spectrum for the Generalized Chaplygin Gas Model: The Newtonian Approach
• Cosmic Constraint to DGP Brane Model: Geometrical and Dynamical Perspectives
• CMB Temperature and Matter Power Spectrum in a Decay Vacuum Dark Energy Model

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• Traversable holographic dark energy wormholes constrained by astronomical observations
• Combined constraints on deviations of dark energy from an ideal fluid from Euclid and Planck
• Modified Cosmic Chaplygin AdS Black Hole
• Viscous Chaplygin Gas Models as a Spherical Top-Hat Collapsing Fluids
• Cosmological solutions with time-delay