Imprints of an extended Chevallier-Polarski-Linder parametrization on the large scale of our universe

Abstract

In the present work we perform a systematic analysis of a new dark energy parametrization and its various corrections at first and higher orders around the presence epoch $z=0$, where the first order correction of this dark energy parametrization recovers the known Chevallier-Polarski-Linder model. We have considered up to the third order corrections of this parametrization and investigate the models at the level of background and perturbations. The models have been constrained using the latest astronomical datasets from a series of potential astronomical data, such as the cosmic microwave background observations, baryon acoustic oscillations measurements, recent Pantheon sample of the supernova type Ia and the Hubble parameter measurements. From the analyses we found that all parametrization favor the quintessential character of the dark energy equation of state where the phantom crossing is marginally allowed (within 68\% CL). Finally, we perform the Bayesian analysis using \texttt{MCEvidence} to quantify the statistical deviations of the parametrizations compared to the standard $\Lambda$CDM cosmology. The Bayesian analysis reports that $\Lambda$CDM is favored over all the DE parametrizations.

17 pages, 12 captioned figures, 8 tables, accepted for publication by EPJC

References in corpus (22)

• Dynamics of dark energy
• The Complete Light-curve Sample of Spectroscopically Confirmed Type Ia Supernovae from Pan-STARRS1 and Cosmological Constraints from The Combined Pantheon Sample
• The Clustering of the SDSS DR7 Main Galaxy Sample I: A 4 per cent Distance Measure at z=0.15
• The Simons Observatory: Science goals and forecasts
• Laser Interferometer Space Antenna
• The DESI Experiment Part I: Science,Targeting, and Survey Design
• A parametric model for dark energy
• Constraints on the sum of the neutrino masses in dynamical dark energy models with $w(z)\ge -1$ are tighter than those obtained in $\Lambda$CDM
• The oscillating dark energy: future singularity and coincidence problem
• Probing for dynamics of dark energy and curvature of universe with latest cosmological observations
• Observational Constraints on Oscillating Dark-Energy Parametrizations
• A New Equation of State for Dark Energy Model
• A New Class of Parametrization for Dark Energy without Divergence
• Future Constraints on Dynamical Dark-Energy using Gravitational-Wave Standard Sirens
• Oscillations in the dark energy EoS: new MCMC lessons
• Modified gravity for surveys
• Fourier-series expansion of the dark-energy equation of state
• Cosmological constraints from the redshift dependence of the Alcock-Paczynski effect: Dynamical dark energy
• Growth index and statefinder diagnostic of Oscillating Dark Energy
• Constraints on oscillating dark energy models
• Probing a Steep EoS for Dark Energy with latest observations
• Cosmic chronometers constraints on some fast-varying dark energy equations of state

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• Dynamical dark energy confronted with multiple CMB missions
• Observational Constraints on Dark Energy Models with $\Lambda$ as an Equilibrium Point
• Model-independently calibrating the luminosity correlations of gamma-ray bursts using deep learning
• Testing an oscillatory behavior of dark energy
• Dark Energy within the Generalized Uncertainty Principle in Light of DESI DR2
• Cosmographic Footprints of Dynamical Dark Energy
• Robust evidence for dynamical dark energy in light of DESI DR2 and joint ACT, SPT, and Planck data
• Constraints on Dark Energy Models Using Late Universe Probes
• Shape of Dark Energy: Constraining Its Evolution with a General Parametrization
• Beyond Two Parameters: Revisiting Dark Energy with the Latest Cosmic Probes
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• A New Window on Dynamical Dark Energy: Combining DESI-DR2 BAO with future Gravitational Wave Observations
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• Dark Energy Constraints from Pantheon+ Ia Supernovae Data
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• Is the $\Lambda$CDM Model in Crisis?