Dark energy with oscillatory tracking potential: Observational Constraints and Perturbative effects

Abstract

The cosmological models exhibiting tracker properties have great significance in the context of dark energy as they can reach the present value of dark energy density from a wide range of initial conditions, thereby alleviating both the fine-tuning and the cosmic coincidence problem. The $\alpha$-attractors, which are originally discussed in the context of inflation, can exhibit the properties of dark energy as they can behave like cosmological trackers at early times and show the late time behaviour of a cosmological constant. In the present paper, we study the Oscillatory Tracker Model (OTM), which belongs to the family of $\alpha$-attractor dark energy models. Using the current observational data sets like Cosmic Microwave Background (CMB), Baryon Acoustic Oscillation (BAO) and type 1a supernova data (Pantheon compilation), we constrain the parameters of the model and estimate both the mean and best-fit values. Although the oscillatory tracker model contains a larger set of parameters than the usual LCDM model, the common set of parameters of both agree within $1\sigma$ error limits. Our observations using both high redshift and low redshift data supports Hubble parameter value $H_0=67.4$ Kms${}^{-1}$Mpc${}^{-1}$. We study the effect of the OTM on the CMB temperature and polarization power spectra, matter power spectrum and $f{\sigma }_8$. Our analysis of the CMB power spectrum and matter power spectrum suggests that the oscillatory tracker dark energy model has noticeable differences from usual LCDM predictions. Yet, in most cases, the agreement is very close.

References in corpus (77)

• Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
• Measurements of Omega and Lambda from 42 High-Redshift Supernovae
• 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
• Modified Gravity and Cosmology
• LSST: from Science Drivers to Reference Design and Anticipated Data Products
• A Phantom Menace? Cosmological consequences of a dark energy component with super-negative equation of state
• The clustering of galaxies in the completed SDSS-III Baryon Oscillation Spectroscopic Survey: cosmological analysis of the DR12 galaxy sample
• 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
• The Cosmic Linear Anisotropy Solving System (CLASS) II: Approximation schemes
• Phantom Energy and Cosmic Doomsday
• The Standard Model Higgs boson as the inflaton
• A Dynamical Solution to the Problem of a Small Cosmological Constant and Late-time Cosmic Acceleration
• Essentials of k-essence
• The Clustering of the SDSS DR7 Main Galaxy Sample I: A 4 per cent Distance Measure at z=0.15
• Cosmological Perturbation Theory in the Synchronous vs. Conformal Newtonian Gauge
• Cosmological Perturbation Theory in the Synchronous and Conformal Newtonian Gauges
• Kinetically Driven Quintessence
• Properties of singularities in (phantom) dark energy universe
• Planck 2018 results. V. CMB power spectra and likelihoods
• Wide-Field InfrarRed Survey Telescope-Astrophysics Focused Telescope Assets WFIRST-AFTA 2015 Report
• Accelerated expansion of the universe driven by tachyonic matter
• The WiggleZ Dark Energy Survey: Joint measurements of the expansion and growth history at z < 1
• Monodromy in the CMB: Gravity Waves and String Inflation
• Cosmology with a Primordial Scaling Field
• Gravity Waves and Linear Inflation from Axion Monodromy
• Dark Energy
• Cosmic Microwave Background Anisotropies
• Universality Class in Conformal Inflation
• Cobaya: Code for Bayesian Analysis of hierarchical physical models
• Quintessence: A Review
• Quintessence arising from exponential potentials
• Cosmology with tachyon field as dark energy
• Structure formation with a self-tuning scalar field
• Dark Energy vs. Modified Gravity
• Testing General Relativity in Cosmology
• Oscillations in the CMB from Axion Monodromy Inflation
• Large-scale instability in interacting dark energy and dark matter fluids
• Runaway dilaton and equivalence principle violations
• Reconstructing the history of structure formation using redshift distortions
• The Cosmological Constant Problem and Quintessence
• The WiggleZ Dark Energy Survey: Improved Distance Measurements to z = 1 with Reconstruction of the Baryonic Acoustic Feature
• Aspects of the cosmological "coincidence problem"
• Testing cosmological structure formation using redshift-space distortions
• The WiggleZ Dark Energy Survey: Final data release and cosmological results
• What is needed of a tachyon if it is to be the dark energy?
• Induced gravity inflation in the standard model of particle physics
• Testing LCDM with the Growth Function δ(a): Current Constraints
• Cosmological dynamics of the tachyon with an inverse power-law potential
• The Dynamics of Quintessence, The Quintessence of Dynamics
• Multifield Inflation after Planck: The Case for Nonminimal Couplings
• Inflation Physics from the Cosmic Microwave Background and Large Scale Structure
• Large-scale curvature and entropy perturbations for multiple interacting fluids
• Jordan Frame Supergravity and Inflation in NMSSM
• Tracking solutions in tachyon cosmology
• Growth of Cosmic Structure: Probing Dark Energy Beyond Expansion
• Observational consequences of chaotic inflation with nonminimal coupling to gravity
• Dark energy, $\alpha$-attractors, and large-scale structure surveys
• Observational Constraints on Quintessence: Thawing, Tracker, and Scaling models
• The BOSS-WiggleZ overlap region I: Baryon Acoustic Oscillations
• Does the first chaotic inflation model in supergravity provide the best fit to the Planck data?
• Cosmological Scaling Solutions of Multiple Tachyon Fields with Inverse Square Potentials
• Dark energy: investigation and modeling
• Updated observational constraints on quintessence dark energy models
• Reconstructing a $f(R)$ theory from the $\alpha$-Attractors
• Dark energy from $\alpha$-attractors: phenomenology and observational constraints
• Brane-Antibrane Backreaction in Axion Monodromy Inflation
• New tracker models of dark energy
• Bayesian evidence for $\alpha$-attractor dark energy models
• Probing features in the primordial perturbation spectrum with large-scale structure data
• Tunneling in Axion Monodromy
• Observational constraints on the generalized $\alpha$ attractor model
• On Modified Gravity
• Distinguishing modified gravity models
• Probing the Holography of Near-Horizon AdS(5)xS(5) Geometry
• The Viability of Phantom Dark Energy as a Quantum Field in 1st-Order FLRW Space