$\alpha$-attractor dark energy in view of next-generation cosmological surveys

Abstract

The $\alpha$-attractor inflationary models are nowadays favored by CMB Planck observations. Their similarity with canonical quintessence models motivates the exploration of a common framework that explains both inflation and dark energy. We study the expected constraints that next-generation cosmological experiments will be able to impose for the dark energy $\alpha$-attractor model. We systematically account for the constraining power of SNIa from WFIRST, BAO from DESI and WFIRST, galaxy clustering and shear from LSST and Stage-4 CMB experiments. We assume a tensor-to-scalar ratio, $10^{-3}<r<10^{-2}$, which permits to explore the wide regime sufficiently close, but distinct, to a cosmological constant, without need of fine tunning the initial value of the field. We find that the combination S4CMB + LSST + SNIa will achieve the best results, improving the FoM by almost an order of magnitude; respect to the S4CMB + BAO + SNIa case. We find this is also true for the FoM of the $w_0-w_a$ parameters. Therefore, future surveys will be uniquely able to probe models connecting early and late cosmic acceleration.

arXiv commentV1: 22 pages, 10 figures, comments welcome; V2: minor changes, accepted for publication in JCAP

References in corpus (62)

• Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
• Measurements of Omega and Lambda from 42 High-Redshift Supernovae
• Planck 2013 results. XVI. Cosmological parameters
• Nine-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Parameter Results
• The clustering of galaxies in the completed SDSS-III Baryon Oscillation Spectroscopic Survey: cosmological analysis of the DR12 galaxy sample
• Exploring the Expansion History of the Universe
• Accelerating Universes with Scaling Dark Matter
• The Cosmic Linear Anisotropy Solving System (CLASS) II: Approximation schemes
• Color Separation of Galaxy Types in the Sloan Digital Sky Survey Imaging Data
• An analytic model for the spatial clustering of dark matter haloes
• Three Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Polarization Analysis
• The DESI Experiment Part I: Science,Targeting, and Survey Design
• Weak Gravitational Lensing of the CMB
• Wide-Field InfrarRed Survey Telescope-Astrophysics Focused Telescope Assets WFIRST-AFTA 2015 Report
• LSST Science Book, Version 2.0
• Universality Class in Conformal Inflation
• BICEP2 / Keck Array VI: Improved Constraints On Cosmology and Foregrounds When Adding 95 GHz Data From Keck Array
• Mass Reconstruction with CMB Polarization
• The effects of galaxy formation on the matter power spectrum: A challenge for precision cosmology
• The Unity of Cosmological Attractors
• Report of the Dark Energy Task Force
• Effects of Baryons and Dissipation on the Matter Power Spectrum
• Planck 2015 results. XIV. Dark energy and modified gravity
• Measuring primordial non-gaussianity without cosmic variance
• SPT-3G: A Next-Generation Cosmic Microwave Background Polarization Experiment on the South Pole Telescope
• First Cosmology Results using Type Ia Supernovae from the Dark Energy Survey: Constraints on Cosmological Parameters
• DESI and other dark energy experiments in the era of neutrino mass measurements
• Type Ia Supernova Distances at z > 1.5 from the Hubble Space Telescope Multi-Cycle Treasury Programs: The Early Expansion Rate
• The DEEP2 Galaxy Redshift Survey: Color and Luminosity Dependence of Galaxy Clustering at z~1
• Inflation Physics from the Cosmic Microwave Background and Large Scale Structure
• Simulations of the WFIRST Supernova Survey and Forecasts of Cosmological Constraints
• The impact of baryons on the matter power spectrum from the Horizon-AGN cosmological hydrodynamical simulation
• hi_class: Horndeski in the Cosmic Linear Anisotropy Solving System
• The POLARBEAR-2 and the Simons Array Experiment
• Limits of Quasi-Static Approximation in Modified-Gravity Cosmologies
• Galaxy Clustering and Galaxy Bias in a Lambda-CDM Universe
• Dark energy, $\alpha$-attractors, and large-scale structure surveys
• Ultra large-scale cosmology in next-generation experiments with single tracers
• Quintessential Inflation with $\alpha$-attractors
• Constraining ultra large-scale cosmology with multiple tracers in optical and radio surveys
• Modeling baryonic physics in future weak lensing surveys
• Baryons, Neutrinos, Feedback and Weak Gravitational Lensing
• The effect of baryons on redshift space distortions and cosmic density and velocity fields in the EAGLE simulation
• Instant Preheating in Quintessential Inflation with $\alpha$-Attractors
• Scale-invariant alternatives to general relativity
• Precision Epoch of Reionization studies with next-generation CMB experiments
• The impact of baryonic processes on the two-point correlation functions of galaxies, subhaloes and matter
• Wide-Field InfraRed Survey Telescope-Astrophysics Focused Telescope Assets WFIRST-AFTA Final Report
• Inflationary $\alpha$-attractors from $F(R)$ Gravity
• Perturbative approach to covariance matrix of the matter power spectrum
• The impact of relativistic effects on cosmological parameter estimation
• Higgs-Dilaton Cosmology: An inflation - dark energy connection and forecasts for future galaxy surveys
• Dark Energy from $\alpha$-Attractors
• Reconstructing a $f(R)$ theory from the $\alpha$-Attractors
• Quintessence's Last Stand?
• Dark energy from $\alpha$-attractors: phenomenology and observational constraints
• New tracker models of dark energy
• Scale-invariant alternatives to general relativity. III. The inflation--dark-energy connection
• Bayesian evidence for $\alpha$-attractor dark energy models
• Sourcing Dark Matter and Dark Energy from $\alpha$-attractors
• Observational constraints on the generalized $\alpha$ attractor model
• Dark energy as a remnant of inflation and electroweak symmetry breaking

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• $R^p$ Attractors Static Neutron Star Phenomenology
• Universal Inflationary Attractors Implications on Static Neutron Stars
• 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
• Generalized $R^p$-attractor Cosmology in the Jordan and Einstein Frames: New Type of Attractors and Revisiting Standard Jordan Frame $R^p$ Inflation
• Constraining the quintessential $\alpha$-attractor inflation through dynamical horizon exit method
• A novel way of constraining the $\alpha$-attractor chaotic inflation through Planck data