Testing the equation of state for viscous dark energy

Abstract

Some cosmological scenarios with bulk viscosity for the dark energy fluid are considered. Based on some considerations related to hydrodynamics, two different equations of state for dark energy are assumed, leading to power-law and logarithmic effective corrections to the pressure. The models are tested with the latest astronomical data from Type Ia supernovae (Pantheon sample), measurements of the Hubble parameter $H(z)$, Baryon Acoustic Oscillations and Cosmic Microwave Background radiation. In comparison with $\Lambda$CDM model, some different results are obtained and their viability is discussed. The power-law model shows some modest results, achieved under negative values of bulk viscosity, while the logarithmic scenario provide good fits in comparison to $\Lambda$CDM model.

arXiv comment13 pages, 3 figures. To be published in PRD

References in corpus (57)

• Planck 2015 results. XIII. Cosmological parameters
• Planck 2013 results. XVI. Cosmological parameters
• Detection of the Baryon Acoustic Peak in the Large-Scale Correlation Function of SDSS Luminous Red Galaxies
• The Complete Light-curve Sample of Spectroscopically Confirmed Type Ia Supernovae from Pan-STARRS1 and Cosmological Constraints from The Combined Pantheon Sample
• The 6dF Galaxy Survey: Baryon Acoustic Oscillations and the Local Hubble Constant
• Dark energy cosmology: the equivalent description via different theoretical models and cosmography tests
• Dark Energy and the Accelerating Universe
• The clustering of galaxies in the SDSS-III Baryon Oscillation Spectroscopic Survey: Baryon Acoustic Oscillations in the Data Release 10 and 11 galaxy samples
• Baryon Acoustic Oscillations in the Sloan Digital Sky Survey Data Release 7 Galaxy Sample
• The Clustering of the SDSS DR7 Main Galaxy Sample I: A 4 per cent Distance Measure at z=0.15
• Constraints on the redshift dependence of the dark energy potential
• A 6% measurement of the Hubble parameter at $z\sim 0.45$: direct evidence of the epoch of cosmic re-acceleration
• Cosmic Chronometers: Constraining the Equation of State of Dark Energy. I: H(z) Measurements
• Raising the bar: new constraints on the Hubble parameter with cosmic chronometers at z$\sim$2
• Improved constraints on the expansion rate of the Universe up to z~1.1 from the spectroscopic evolution of cosmic chronometers
• The WiggleZ Dark Energy Survey: mapping the distance-redshift relation with baryon acoustic oscillations
• Baryon Acoustic Oscillations in the Lyα forest of BOSS DR11 quasars
• Inhomogeneous Equation of State of the Universe: Phantom Era, Future Singularity and Crossing the Phantom Barrier
• A 2% Distance to z=0.35 by Reconstructing Baryon Acoustic Oscillations - I : Methods and Application to the Sloan Digital Sky Survey
• Imperfect Dark Energy from Kinetic Gravity Braiding
• The final state and thermodynamics of dark energy universe
• Age-dating Luminous Red Galaxies observed with the Southern African Large Telescope
• Quasar-Lyman $\alpha$ Forest Cross-Correlation from BOSS DR11 : Baryon Acoustic Oscillations
• Observational constraints on dark energy with generalized equations of state
• Modeling the Anisotropic Two-Point Galaxy Correlation Function on Small Scales and Improved Measurements of H(z), D_A(z), and f(z)sigma_8(z) from the Sloan Digital Sky Survey DR7 Luminous Red Galaxies
• Dark energy two decades after: Observables, probes, consistency tests
• Viscous Cosmology for Early- and Late-Time Universe
• Viscous Little Rip Cosmology
• The Baryonic Acoustic Feature and Large-Scale Clustering in the SDSS LRG Sample
• Simultaneous constraints on the growth of structure and cosmic expansion from the multipole power spectra of the SDSS DR7 LRG sample
• The clustering of galaxies in the SDSS-III Baryon Oscillation Spectroscopic Survey: single-probe measurements and the strong power of normalized growth rate on constraining dark energy
• Does Bulk Viscosity Create a Viable Unified Dark Matter Model?
• Viscous dark energy and phantom evolution
• Is exponential gravity a viable description for the whole cosmological history?
• Dissipation of dark matter
• A model with interaction of dark components and recent observational data
• Constraints on dissipative unified dark matter
• Cosmological Fluids with Logarithmic Equation of State
• Viscous Dark Cosmology with Account of Quantum Effects
• Large scale structure from viscous dark matter
• Relativistic self-gravitating Bose-Einstein condensates and cold baryons with a stiff equation of state
• Large-scale inhomogeneities in modified Chaplygin gas cosmologies
• Characteristic Properties of Two Different Viscous Cosmology Models for the Future Universe
• Accelerating cosmological expansion from shear and bulk viscosity
• Chaplygin DGP cosmologies
• Observational constraints on cosmological models with Chaplygin gas and quadratic equation of state
• Crossing of the w=-1 Barrier in Two-Fluid Viscous Modified Gravity
• Testing logarithmic corrections on $R^2$-exponential gravity by observational data
• Distance Priors from \emph{Planck} 2015 data
• Crossing the phantom divide with dissipative normal matter in the Israel-Stewart-Hiscock formalism
• Analysing dissipative effects in the $\Lambda$CDM model
• Constraining Logotropic Unified Dark Energy Models
• Nonlinear bulk viscosity and the stability of accelerated expansion in FRW spacetime
• Viscous Coupled Fluids in Inflationary Cosmology
• Extended family of generalized Chaplygin gas models
• Cosmological Models Coupled with Dark Matter in a Dissipative Universe
• Bulk viscosity, interaction and the viability of phantom solutions

Cited by in corpus (30)

• Analyzing the $H_0$ tension in $F(R)$ gravity models
• Finite-time Cosmological Singularities and the Possible Fate of the Universe
• An analysis of the $H_0$ tension problem in a universe with a viscous dark fluid
• Radial pulsations, moment of inertia and tidal deformability of dark energy stars
• Modeling of accelerating Universe with bulk viscous fluid in Bianchi V space-time
• Constraining viscous dark energy equation of state in $f(R,L_m)$ gravity
• Growth of matter perturbations in the extended viscous dark energy models
• On the use of galaxies as clocks and the universal expansion
• Solving the $H_0$ tension in $f(T)$ Gravity through Bayesian Machine Learning
• Viscous cosmology in $f(T)$ gravity
• Effective equation of state in modified gravity and observational constraints
• Cosmic acceleration with bulk viscosity in an anisotropic $f(R,L_m)$ background
• Evolution of thermodynamic quantities on cosmological horizon in $\Lambda (t)$ model
• A generalized $\Lambda$CDM model with parameterized Hubble parameter in particle creation, viscous and $f(R)$ model framework
• New Tsallis Agegraphic Dark Energy
• Bulk viscous fluid in symmetric teleparallel cosmology: theory versus experiment
• Modified Equations of State for Dark Energy and Observational Limitations
• Energy conditions for Inhomogeneous EOS and its Thermodynamics analysis with the resolution on finite time future singularity problems
• Evolution of dissipative and non-dissipative universes in holographic cosmological models with a power-law term
• An approach to cold dark matter deviation and the $H_0$ tension problem by using machine learning
• Effect of bulk viscosity in cosmic acceleration
• Horizon thermodynamics and cosmological equations: A holographic-like connection between thermostatistical quantities on a cosmological horizon and in the bulk
• Fingerprints of the cosmological constant: Folds in the profiles of the axionic dark matter distribution in a dyon exterior
• Cosmological model based on both holographic-like connection and Padmanabhan's holographic equipartition law
• Thermodynamics of viscous dark energy for the late future time universe
• Holographic thermodynamic relation for dissipative and non-dissipative universes in a flat FLRW cosmology
• Is Dark Energy Changing? Probing the Universe's Expansion with present and future astronomical probes
• Multiple fluid theory of cosmic evolution and its thermodynamic analysis
• Note on bulk viscosity as an alternative to dark energy
• Cosmological scenario based on the first and second laws of thermodynamics: Thermodynamic constraints on a generalized cosmological model