Late-time acceleration with a scalar field source: Observational constraints and statefinder diagnostics

Abstract

This article discusses a dark energy cosmological model in the standard theory of gravity - general relativity with a broad scalar field as a source. Exact solutions of Einstein's field equations are derived by considering a particular form of deceleration parameter $q$, which shows a smooth transition from decelerated to accelerated phase in the evolution of the universe. The external datasets such as Hubble ($H(z)$) datasets, Supernovae (SN) datasets, and Baryonic Acoustic Oscillation (BAO) datasets are used for constraining the model par parameters appearing in the functional form of $q$. The transition redshift is obtained at for the combined data set ($H(z)+SN+BAO$), where the model shows signature-flipping and is consistent with recent observations. Moreover, the present value of the deceleration parameter comes out to be $q_0=-0.50_{-0.11}^{+0.12}$ and the jerk parameter (close to 1) for the combined datasets, which is compatible as per Planck2018 results. The analysis also constrains the omega value i.e., ${\Omega }_{m_0}\le 0.269$ for the smooth evolution of the scalar field EoS parameter. It is seen that energy density is higher for the effective energy density of the matter field than energy density in the presence of a scalar field. The evolution of the physical and geometrical parameters is discussed in some details with the model parameters' numerical constrained values. Moreover, we have performed the state-finder analysis to investigate the nature of dark energy.

arXiv commentPhysics of the Dark Universe published version

References in corpus (66)

• Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
• Measurements of Omega and Lambda from 42 High-Redshift Supernovae
• Seven-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation
• Planck 2013 results. XVI. Cosmological parameters
• Nine-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Parameter Results
• Detection of the Baryon Acoustic Peak in the Large-Scale Correlation Function of SDSS Luminous Red Galaxies
• Cosmological Imprint of an Energy Component with General Equation of State
• The Case for a Positive Cosmological Lambda-term
• 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
• An alternative to quintessence
• Dark energy cosmology: the equivalent description via different theoretical models and cosmography tests
• Phantom Energy and Cosmic Doomsday
• SDSS-III: Massive Spectroscopic Surveys of the Distant Universe, the Milky Way Galaxy, and Extra-Solar Planetary Systems
• The Baryon Oscillation Spectroscopic Survey of SDSS-III
• 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
• Essentials of k-essence
• The Hubble Space Telescope Cluster Supernova Survey: V. Improving the Dark Energy Constraints Above z>1 and Building an Early-Type-Hosted Supernova Sample
• Improved Cosmological Constraints from New, Old and Combined Supernova Datasets
• Statefinder -- a new geometrical diagnostic of dark energy
• Spectra and Light Curves of Six Type Ia Supernovae at 0.511 < z < 1.12 and the Union2 Compilation
• Seven-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Power Spectra and WMAP-Derived Parameters
• 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
• A 2% Distance to z=0.35 by Reconstructing Baryon Acoustic Oscillations - I : Methods and Application to the Sloan Digital Sky Survey
• On average properties of inhomogeneous fluids in general relativity I: dust cosmologies
• Prospects for probing the dark energy via supernova distance measurements
• Reconstructing the Cosmic Equation of State from Supernova distances
• Hubble parameter measurement constraints on the cosmological deceleration-acceleration transition redshift
• Hubble parameter measurement constraints on the redshift of the deceleration-acceleration transition, dynamical dark energy, and space curvature
• How to determine an effective potential for a variable cosmological term
• A kinematical approach to dark energy studies
• From cosmic deceleration to acceleration: new constraints from SN Ia and BAO/CMB
• Cosmography and constraints on the equation of state of the Universe in various parametrizations
• Entropic Accelerating Universe
• A Local Void and the Accelerating Universe
• Cosmographic analysis with Chebyshev polynomials
• What Do We Really Know About Cosmic Acceleration?
• Parametrization of Quintessence and Its Potential
• Cosmological dynamics of non-minimally coupled scalar field system and its late time cosmic relevance
• Three thermodynamically-based parametrizations of the deceleration parameter
• Statefinders, higher-order energy conditions and sudden future singularities
• Astronomical bounds on a cosmological model allowing a general interaction in the dark sector
• Constraints on kinematic models from the latest observational data
• Acceleration of the universe with a simple trigonometric potential
• Does the entropy of the Universe tend to a maximum?
• Constraints on large scale inhomogeneities from WMAP-5 and SDSS: confrontation with recent observations
• Reconstruction of cosmic history from a simple parametrization of H
• A thermodynamic motivation for dark energy
• SCALAR FIELD COSMOLOGIES WITH PERFECT FLUID IN ROBERTSON-WALKER METRIC
• Gaussian Process Estimation of Transition Redshift
• Constraints on cosmological parameters in power-law cosmology
• Cosmography: Supernovae Union2, Baryon Acoustic Oscillation, Observational Hubble Data and Gamma Ray Bursts
• In search of the dark matter dark energy interaction: a kinematic approach
• Reconstruction and constraining of the jerk parameter from OHD and SNe Ia observations
• SN and BAO constraints on (new) polynomial dark energy parametrizations: current results and forecasts
• Acceleration of the universe: a reconstruction of the effective equation of state
• Accelerating Universe in Hybrid and Logarithmic Teleparallel Gravity
• Beyond H_0 and q_0: Cosmology is no longer just two numbers
• Exploring scalar field dynamics with Gaussian processes
• Does information entropy play a role in the expansion and acceleration of the Universe?
• FLRW cosmology with EDSFD parametrization
• Configuration entropy of the Cosmic Web: Can voids mimic the dark energy?
• A general reconstruction of the recent expansion history of the universe
• A new parametrization of dark energy equation of state leading to double exponential potential

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• Model-independent study for a quintessence model of dark energy: Analysis and Observational constraints
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• Roles of Modified Chaplygin-Jacobi and Chaplygin-Abel Gases in FRW Universe
• Bianchi type-V Transitioning model in Brans-Dicke theory with Observational Constraint
• Revisiting kink-like parametrization and constraints using OHD/Pantheon+/BAO samples
• Scalar field dark energy: Insights into cosmological evolution and black hole accretion
• Generalized Ghost Pilgrim Dark Energy Fractal Cosmology with Observational Constraint
• Reconstructing cosmic evolution with a density parametrization
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• Observational Constraints and Cosmological Dynamics of Interacting Fractional Holographic Dark Energy in Light of DESI DR2