Bayesian evidence for $\alpha$-attractor dark energy models

Abstract

Dark energy models with tracker properties have gained attention due to the large range of initial conditions leading to the current value of the dark energy density parameter. A well-motivated family of these models are the so-called $\alpha$-attractors, which show the late time behavior of a cosmological constant. In the present paper we perform a model-selection analysis of a variety of $\alpha$-attractor potentials in comparison with a non-flat $\Lambda$CDM model. Specifically, we compute the Bayes Factor for the L-Model, the Oscillatory Tracker Model, the Recliner Model, and the Starobinsky Model, while considering the non-flat $\Lambda$CDM as the base model. Each model is tested through a Bayesian analysis using observations relevant to the current accelerated expansion: we employ the latest SNe Ia data, combined with cosmic clocks, the latest BOSS release of BAO data, and the Planck Compressed 2018 data. The produced Markov Chains for each model are further compared through a Bayesian evidence analysis. From the latter we conclude that the Oscillatory Tracker Model is preferred by data (even if weakly) over the non-flat $\Lambda$CDM model. Our results also suggest at the L-model is the least favoured version of the $\alpha$-attractor models considered.

arXiv comment18 pages, 3 figures, 6 tables. Final version accepted for publication in JCAP

References in corpus (78)

• Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
• Measurements of Omega and Lambda from 42 High-Redshift Supernovae
• Detection of the Baryon Acoustic Peak in the Large-Scale Correlation Function of SDSS Luminous Red Galaxies
• Modified Gravity and Cosmology
• 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
• MultiNest: an efficient and robust Bayesian inference tool for cosmology and particle physics
• 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
• Phantom Energy and Cosmic Doomsday
• The Clustering of the SDSS DR7 Main Galaxy Sample I: A 4 per cent Distance Measure at z=0.15
• Multimodal nested sampling: an efficient and robust alternative to MCMC methods for astronomical data analysis
• Bayes in the sky: Bayesian inference and model selection in cosmology
• Properties of singularities in (phantom) dark energy universe
• A 6% measurement of the Hubble parameter at $z\sim 0.45$: direct evidence of the epoch of cosmic re-acceleration
• Raising the bar: new constraints on the Hubble parameter with cosmic chronometers at z$\sim$2
• Constraining Cosmological Parameters Based on Relative Galaxy Ages
• Importance Nested Sampling and the MultiNest Algorithm
• The WiggleZ Dark Energy Survey: Joint measurements of the expansion and growth history at z < 1
• Conservative Constraints on Early Cosmology: an illustration of the Monte Python cosmological parameter inference code
• Dark Energy
• Universality Class in Conformal Inflation
• Superconformal Inflationary $\alpha$-Attractors
• Quintessence: A Review
• PolyChord: nested sampling for cosmology
• The Cosmic Linear Anisotropy Solving System (CLASS) I: Overview
• PolyChord: next-generation nested sampling
• Dark Energy vs. Modified Gravity
• The WiggleZ Dark Energy Survey: Improved Distance Measurements to z = 1 with Reconstruction of the Baryonic Acoustic Feature
• Superconformal generalizations of the Starobinsky model
• New constraints on cosmological parameters and neutrino properties using the expansion rate of the Universe to z~1.75
• The WiggleZ Dark Energy Survey: Final data release and cosmological results
• Observational Constraints on Dark Energy and Cosmic Curvature
• Distance Priors from Planck Final Release
• The Dynamics of Quintessence, The Quintessence of Dynamics
• Superconformal Symmetry, Supergravity and Cosmology
• No evidence for extensions to the standard cosmological model
• Efficient Cosmological Parameter Estimation from Microwave Background Anisotropies
• Planck, LHC, and $\alpha$-attractors
• Dark energy, $\alpha$-attractors, and large-scale structure surveys
• Quintessential Inflation with $\alpha$-attractors
• Single-field $\alpha$-attractors
• Superconformal Generalization of the Chaotic Inflation Model λϕ^4/4 - ξ/ 2 ϕ^2 R
• Power of Observational Hubble Parameter Data: a Figure of Merit Exploration
• Examining the evidence for dynamical dark energy
• Properties of Nested Sampling
• Constraints on α-attractor inflation and reheating
• Observational Constraints on Quintessence: Thawing, Tracker, and Scaling models
• Instant Preheating in Quintessential Inflation with $\alpha$-Attractors
• The dark side of gravity: Modified theories of gravity
• Inflationary $\alpha$-attractors from $F(R)$ Gravity
• Bayesian Calibrated Significance Levels Applied to the Spectral Tilt and Hemispherical Asymmetry
• The past and future dynamics of quintom dark energy models
• The BOSS-WiggleZ overlap region I: Baryon Acoustic Oscillations
• Computational methods for Bayesian model choice
• CMB and reheating constraints to α-attractor inflationary models
• Quintom dark energy models with nearly flat potentials
• Observational Constraints on Oscillating Dark-Energy Parametrizations
• Statefinder diagnostic for the modified polytropic Cardassian universe
• Modified gravity for surveys
• Dark Energy from $\alpha$-Attractors
• Planck priors for dark energy surveys
• Updated observational constraints on quintessence dark energy models
• Dark energy from $\alpha$-attractors: phenomenology and observational constraints
• Cosmological $\alpha$-Attractors and de Sitter Landscape
• Neutrino Mass Priors for Cosmology from Random Matrices
• Simultaneous constraints on the number and mass of relativistic species
• Non-slow-roll dynamics in $\alpha -$attractors
• New tracker models of dark energy
• Sneutrino Inflation with $\alpha$-attractors
• Bayesian Methods in Cosmology
• Observational constraints on the generalized $\alpha$ attractor model
• On Modified Gravity
• Bayesian Model Selection with Future 21cm Observations of The Epoch of Reionisation
• Distinguishing modified gravity models
• Theoretical and observational constraints on Tachyon Inflation
• The Viability of Phantom Dark Energy as a Quantum Field in 1st-Order FLRW Space

Cited by in corpus (20)

• An overview of what current data can (and cannot yet) say about evolving dark energy
• $R^p$ Attractors Static Neutron Star Phenomenology
• Universal Inflationary Attractors Implications on Static Neutron Stars
• Model selection applied to reconstructions of the Dark Energy
• Inflationary Attractors Predictions for Static Neutron Stars in the Mass-Gap Region
• Static Neutron Stars Perspective of Quadratic and Induced Inflationary Attractor Scalar-tensor Theories
• Quintessential $\alpha$-attractor inflation: forecasts for Stage IV galaxy surveys
• Latest evidence for a late time vacuum -- geodesic CDM interaction
• Observational constraints on $\alpha$-attractor inflationary models with a Higgs-like potential
• DESI constraints on $\alpha$-attractor inflationary models
• $\alpha$-attractor dark energy in view of next-generation cosmological surveys
• On the $\alpha$-attractor T-models
• New generalization of the simplest $\alpha$-attractor $T$ model
• Observational constraints in Delta Gravity: CMB and supernovas
• Cosmological implications of tracker scalar fields: Testing the evidence for dynamical dark energy with recent data
• Hubble tension and matter inhomogeneities: a theoretical perspective
• Bayesian analysis for a class of $\alpha$-attractor inflationary models
• Revisiting cosmological diffusion models in Unimodular Gravity and the $H_0$ tension
• Dark energy with oscillatory tracking potential: Observational Constraints and Perturbative effects
• Bayes' Theorem, Inflation, and the Ekpyrotic Universe