The simplest parametrization of equation of state parameter in the scalar field Universe

Abstract

In this paper, we have investigated a scalar field cosmological model of accelerating Universe with the simplest parametrization of equation of state parameter of the scalar field. We used $H(z)$ data, pantheon compilation of SN Ia data and BAO data to constrained the model parameters using ${\chi }^2$ minimization technique. We obtain the present values of Hubble constant $H_0$ as $66.2_{-1.34}^{+1.42}$, $70.7_{-0.31}^{+0.32}$ and $67.74_{-1.04}^{+1.24}$ for $H(z)$, $H(z)$ + Pantheon and $H(z)$ + BAO respectively. Also, we have estimated the present age of the Universe in derived model $t_0=14.38_{-0.64}^{+0.63}$ for joint $H(z)$ and pantheon compilation of SN Ia data which has only $0.88\sigma$ tension with its empirical value obtained in Plank collaboration \cite{Ade/2016}. Moreover, the present values of the deceleration parameter $q_0$ come out to be $-0.55_{-0.038}^{+0.031}$, $-0.61_{-0.021}^{+0.030}$ and $-0.627_{-0.025}^{+0.022}$ by bounding the Universe in derived model with $H(z)$, $H(z)$ + Pantheon compilation of SN Ia and $H(z)$ + BAO data sets respectively. We also have performed the state-finder diagnostics to discover the nature of dark energy.

arXiv comment8 Pages, 12 Figures

References in corpus (87)

• Measurements of Omega and Lambda from 42 High-Redshift Supernovae
• Planck 2015 results. XIII. Cosmological parameters
• The Cosmological Constant and Dark Energy
• Nine-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Parameter Results
• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Preliminary Maps and Basic Results
• Type Ia Supernova Discoveries at z>1 From the Hubble Space Telescope: Evidence for Past Deceleration and Constraints on Dark Energy Evolution
• Cosmological Imprint of an Energy Component with General Equation of State
• The clustering of galaxies in the completed SDSS-III Baryon Oscillation Spectroscopic Survey: cosmological analysis of the DR12 galaxy sample
• f(R,T) gravity
• The Case for a Positive Cosmological Lambda-term
• Modified Gravity Theories on a Nutshell: Inflation, Bounce and Late-time Evolution
• The Complete Light-curve Sample of Spectroscopically Confirmed Type Ia Supernovae from Pan-STARRS1 and Cosmological Constraints from The Combined Pantheon Sample
• Quintessence, Cosmic Coincidence, and the Cosmological Constant
• The 6dF Galaxy Survey: Baryon Acoustic Oscillations and the Local Hubble Constant
• An alternative to quintessence
• Discovery of a Supernova Explosion at Half the Age of the Universe and its Cosmological Implications
• Modified gravity with negative and positive powers of the curvature: unification of the inflation and of the cosmic acceleration
• Large Magellanic Cloud Cepheid Standards Provide a 1% Foundation for the Determination of the Hubble Constant and Stronger Evidence for Physics Beyond LambdaCDM
• The clustering of galaxies in the SDSS-III Baryon Oscillation Spectroscopic Survey: Baryon Acoustic Oscillations in the Data Release 10 and 11 galaxy samples
• Models of f(R) Cosmic Acceleration that Evade Solar-System Tests
• Measurements of the Cosmological Parameters Omega and Lambda from the First 7 Supernovae at z >= 0.35
• Cosmological Tracking Solutions
• Statefinder -- a new geometrical diagnostic of dark energy
• Exponential potentials and cosmological scaling solutions
• 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
• The WiggleZ Dark Energy Survey: Joint measurements of the expansion and growth history at z < 1
• Exploring the Expanding Universe and Dark Energy using the Statefinder Diagnostic
• The clustering of galaxies in the SDSS-III Baryon Oscillation Spectroscopic Survey: Baryon Acoustic Oscillations in the Data Release 9 Spectroscopic Galaxy Sample
• Cosmology with a Primordial Scaling Field
• Cosmic Distances Calibrated to 1% Precision with Gaia EDR3 Parallaxes and Hubble Space Telescope Photometry of 75 Milky Way Cepheids Confirm Tension with LambdaCDM
• A 2% Distance to z=0.35 by Reconstructing Baryon Acoustic Oscillations - I : Methods and Application to the Sloan Digital Sky Survey
• Clustering of Luminous Red Galaxies IV: Baryon Acoustic Peak in the Line-of-Sight Direction and a Direct Measurement of H(z)
• Baryon Acoustic Oscillations in the Ly-α forest of BOSS quasars
• Age-dating Luminous Red Galaxies observed with the Southern African Large Telescope
• A classification of scalar field potentials with cosmological scaling solutions
• Dark Matter and Dark Energy
• The WiggleZ Dark Energy Survey: the growth rate of cosmic structure since redshift z=0.9
• Finite-time future singularities in modified Gauss-Bonnet and $\mathcal{F}(R,G)$ gravity and singularity avoidance
• Construction of cosmologically viable f(G) gravity models
• Quintessence without scalar fields
• 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
• Thermodynamic interpretation of the generalized gravity models with geometry - matter coupling
• Dark matter as a geometric effect in f(R) gravity
• Causes of Irregular Energy Density in $f(R,T)$ Gravity
• Hubble Sinks In The Low-Redshift Swampland
• Bianchi type III models with anisotropic dark energy
• Solving the Coincidence Problem: Tracking Oscillating Energy
• HD 140283: A Star in the Solar Neighborhood that Formed Shortly After the Big Bang
• Analysis of Rotation Curves in the framework of R^n gravity
• High-redshift cosmography: auxiliary variables versus Padé polynomials
• Estimating the Redshift Distribution of Photometric Galaxy Samples II. Applications and Tests of a New Method
• Unifying of Inflation with Early and Late Dark Energy Epochs in Axion $F(R)$ Gravity
• Generalized virial theorem in f(R) gravity
• Unification of Inflation with Dark Energy in $f(R)$ Gravity and Axion Dark Matter
• Geometric Inflation and Dark Energy with Axion $F(R)$ Gravity
• The BOOMERanG experiment and the curvature of the Universe
• Probing the curvature and dark energy
• Rescaled Einstein-Hilbert Gravity from $f(R)$ Gravity: Inflation, Dark Energy and the Swampland Criteria
• Some Anisotropic Dark Energy Models in Bianchi Type-V Space-time
• Some Bianchi Type-V Models of Accelerating Universe with Dark Energy
• Cosmology Intertwined IV: The Age of the Universe and its Curvature
• SCALAR FIELD COSMOLOGIES WITH PERFECT FLUID IN ROBERTSON-WALKER METRIC
• On the Role of $f(G,T)$ Terms in Structure Scalars
• Gaussian Process Estimation of Transition Redshift
• How predictions of cosmological models depend on Hubble parameter data sets
• The Genesis of Cosmological Tracker Fields
• Transitioning Universe with hybrid scalar field in Bianchi I space-time
• Touch of Neutrinos on the Vacuum Metamorphosis: is the $H_0$ Solution Back?
• Search for Tracker Potentials in Quintessence Theory
• Power-law solution for homogeneous and isotropic universe in $f(R,T)$ gravity
• A transitioning universe with anisotropic dark energy
• Two Fluid Scenario in Bianchi Type-I Universe
• Invariant Bianchi type I models in $f\left(R,T\right)$ Gravity
• Constraining Bianchi type V universe with recent H(z) and BAO observations in Brans-Dicke theory of gravitation
• The deceleration parameter in `tilted' universes: generalising the Friedmann background
• Which Fundamental Constants for CMB and BAO?
• Singularity-free nonexotic compact star in $f(R,T)$ gravity
• Interacting Dark Sectors in Anisotropic Universe: Observational Constraints and $H_0$ Tension
• Accelerating model of flat universe in $f(R,T)$ gravity
• Posing Constraints on the Free Parameters of a New Model of Dark Energy EoS : Responses Through Cosmological Behaviours
• Lyra's cosmology of homogeneous and isotropic universe in Brans-Dicke theory
• Accelerating Universe with binary mixture of bulk viscous fluid and dark energy

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