Early Dark Energy Cosmologies

Abstract

We propose a novel parameterization of the dark energy density. It is particularly well suited to describe a non-negligible contribution of dark energy at early times and contains only three parameters, which are all physically meaningful: the fractional dark energy density today, the equation of state today and the fractional dark energy density at early times. As we parameterize Omega_d(a) directly instead of the equation of state, we can give analytic expressions for the Hubble parameter, the conformal horizon today and at last scattering, the sound horizon at last scattering, the acoustic scale as well as the luminosity distance. For an equation of state today w_0 < -1, our model crosses the cosmological constant boundary. We perform numerical studies to constrain the parameters of our model by using Cosmic Microwave Background, Large Scale Structure and Supernovae Ia data. At 95% confidence, we find that the fractional dark energy density at early times Omega_early < 0.06. This bound tightens considerably to Omega_early < 0.04 when the latest Boomerang data is included. We find that both the gold sample of Riess et. al. and the SNLS data by Astier et. al. when combined with CMB and LSS data mildly prefer w_0 < -1, but are well compatible with a cosmological constant.

6 pages, 3 figures; references added, matches published version

References in corpus (3)

• Cosmology and the Fate of Dilatation Symmetry
• Can dark energy evolve to the Phantom?
• Analyze This! A Cosmological Constraint Package for CMBEASY

Cited by in corpus (163)

• Planck 2013 results. XVI. Cosmological parameters
• Dark Energy and the Accelerating Universe
• Cosmological implications of baryon acoustic oscillation (BAO) measurements
• Extragalactic Science, Cosmology and Galactic Archaeology with the Subaru Prime Focus Spectrograph (PFS)
• The Hubble Hunter's Guide
• Maximal freedom at minimum cost: linear large-scale structure in general modifications of gravity
• Parameterized Beyond-Einstein Growth
• The Atacama Cosmology Telescope: Cosmological Parameters from the 2008 Power Spectra
• Early dark energy, the Hubble-parameter tension, and the string axiverse
• Planck 2015 results. XIV. Dark energy and modified gravity
• The Atacama Cosmology Telescope: Cosmological parameters from three seasons of data
• Dark energy two decades after: Observables, probes, consistency tests
• The CosmoVerse White Paper: Addressing observational tensions in cosmology with systematics and fundamental physics
• Vector Field Models of Inflation and Dark Energy
• Constraints on Cosmology from the Cosmic Microwave Background Power Spectrum of the 2500 ${\mathrm{deg}}^2$ SPT-SZ Survey
• The Clustering of Galaxies in the SDSS-III Baryon Oscillation Spectroscopic Survey (BOSS): measuring growth rate and geometry with anisotropic clustering
• Measurement of Baryon Acoustic Oscillations in the Lyman-alpha Forest Fluctuations in BOSS Data Release 9
• The First Three Seconds: a Review of Possible Expansion Histories of the Early Universe
• Resolving the Hubble Tension with New Early Dark Energy
• Is the Hubble tension a hint of AdS phase around recombination?
• Towards a cosmological neutrino mass detection
• New Early Dark Energy
• Hydrodynamical N-body simulations of coupled dark energy cosmologies
• Does Hubble Tension Signal a Breakdown in FLRW Cosmology?
• The status of varying constants: a review of the physics, searches and implications
• Accelerating Cosmologies with an Anisotropic Equation of State
• Limits of Quasi-Static Approximation in Modified-Gravity Cosmologies
• Mapping the Cosmological Expansion
• Growth of Cosmic Structure: Probing Dark Energy Beyond Expansion
• Unifying of Inflation with Early and Late Dark Energy Epochs in Axion $F(R)$ Gravity
• The Atacama Cosmology Telescope: Constraints on Pre-Recombination Early Dark Energy
• Cuscuton Cosmology: Dark Energy meets Modified Gravity
• Simultaneous Falsification of LCDM and Quintessence with Massive, Distant Clusters
• Modelling redshift space distortions in hierarchical cosmologies
• Time dependent couplings in the dark sector: from background evolution to nonlinear structure formation
• Measuring the Speed of Dark: Detecting Dark Energy Perturbations
• Testing modified gravity with Planck: the case of coupled dark energy
• How early is early dark energy?
• Gravity in the Era of Equality: Towards solutions to the Hubble problem without fine-tuned initial conditions
• Limits on Dark Radiation, Early Dark Energy, and Relativistic Degrees of Freedom
• Cosmological CPT violating effect on CMB polarization
• Hubble tension or a transition of the Cepheid SnIa calibrator parameters?
• Constraining early and interacting dark energy with gravitational wave standard sirens: the potential of the eLISA mission
• Future CMB Constraints on Early, Cold, or Stressed Dark Energy
• Structure formation in inhomogeneous Early Dark Energy models
• Spherical collapse model in dark energy cosmologies
• Model-independent reconstruction of the Interacting Dark Energy Kernel: Binned and Gaussian process
• High-redshift post-reionization cosmology with 21cm intensity mapping
• Falsifying Paradigms for Cosmic Acceleration
• Observing the clustering properties of galaxy clusters in dynamical dark-energy cosmologies
• Inflation, quintessence, and the origin of mass
• Impact of three years of data from the Wilkinson Microwave Anisotropy Probe on cosmological models with dynamical dark energy
• Early dark energy from zero-point quantum fluctuations
• A comprehensive comparison of cosmological models from latest observational data
• CMB Lensing Constraints on Neutrinos and Dark Energy
• Quintessence reconstructed: new constraints and tracker viability
• Einstein, Planck and Vera Rubin: relevant encounters between the Cosmological and the Quantum Worlds
• Neutrino masses and beyond-$\Lambda$CDM cosmology with LSST and future CMB experiments
• Difficulties Distinguishing Dark Energy from Modified Gravity via Redshift Distortions
• An evaluation of cosmological models from expansion and growth of structure measurements
• The Price of Shifting the Hubble Constant
• How clustering dark energy affects matter perturbations
• A double take on early and interacting dark energy from JWST
• Inflation and Early Dark Energy with a Stage II Hydrogen Intensity Mapping Experiment
• Cosmological dynamics of dark energy in scalar-torsion $f(T,\varphi )$ gravity
• Dark Energy and Neutrino Masses from Future Measurements of the Expansion History and Growth of Structure
• Constraints on early dark energy from CMB lensing and weak lensing tomography
• Can Early Dark Energy Explain EDGES?
• Probing the sign-changeable interaction between dark energy and dark matter with DESI baryon acoustic oscillations and DES supernovae data
• Shifting the Universe: Early Dark Energy and Standard Rulers
• Distinguishing between Neutrinos and time-varying Dark Energy through Cosmic Time
• Early Cosmology Constrained
• Late time cosmology with LISA: probing the cosmic expansion with massive black hole binary mergers as standard sirens
• Early dark energy in $k$-essence
• Inflation, the Hubble Tension and Early Dark Energy: an alternative overview
• Early Dark Energy at High Redshifts: Status and Perspectives
• Eternal Universe
• Can Early Dark Energy be Detected in Non-Linear Structure?
• Interacting dark sector with variable vacuum energy
• On the implementation of the spherical collapse model for dark energy models
• Simulating Momentum Exchange in the Dark Sector
• Dark Energy coupling with electromagnetism as seen from future low-medium redshift probes
• Constraining Variations in the Fine Structure Constant in the presence of Early Dark Energy
• The accelerating universe and a limiting curvature proposal
• A Detection of $z$~2.3 Cosmic Voids from 3D Lyman-$\alpha$ Forest Tomography in the COSMOS Field
• Halo Mass Functions in Early Dark Energy Cosmologies
• Baryon Acoustic Oscillations and Dynamical Dark Energy
• Can the gravitational wave background feel wiggles in spacetime?
• Simulations of Quintessential Cold Dark Matter: beyond the cosmological constant
• Averaging Robertson-Walker Cosmologies
• Exploring the Dark Universe: constraints on dynamical Dark Energy models from CMB, BAO and growth rate measurements
• Zero-point quantum fluctuations in cosmology
• New Constraints on the Early Expansion History
• Hot big bang or slow freeze?
• Is the Dynamics of Tracking Dark Energy Detectable?
• Power Spectra to 1% Accuracy between Dynamical Dark Energy Cosmologies
• Constraints on Neutrino Mass and Light Degrees of Freedom in Extended Cosmological Parameter Spaces
• Measuring Distance Ratios with CMB-Galaxy Lensing Cross-correlations
• Dynamics of the diffusive DM-DE interaction--dynamical system approach
• Diagnostic of Horndeski Theories
• Full Investigation on the Dynamics of Power-Law Kinetic Quintessence
• Extending the Gravitational Growth Framework
• Testing flatness of the universe with probes of cosmic distances and growth
• Understanding the origin of CMB constraints on Dark Energy
• Probing dark energy beyond $z=2$ with CODEX
• Constraining neutrino masses with the ISW-galaxy correlation function
• Probing a Steep EoS for Dark Energy with latest observations
• Modified gravity and coupled quintessence
• Model Independent Early Expansion History and Dark Energy
• Constraints on Steep Equation of State for the Dark Energy using BAO
• Cosmology of Axions and Moduli: A Dynamical Systems Approach
• Fine-structure constant constraints on dark energy: II. Extending the parameter space
• $f(R)$ gravity modifications: from the action to the data
• Testing extended Jordan-Brans-Dicke theories with future cosmological observations
• A cosmological exclusion plot: Towards model-independent constraints on modified gravity from current and future growth rate data
• Late-time vacuum phase transitions: Connecting sub-eV scale physics with cosmological structure formation
• Cosmology with decaying cosmological constant -- exact solutions and model testing
• A cosmic glitch in gravity
• Generalizing the Constant-roll Condition in Scalar Inflation
• Current constraints on early and stressed dark energy models and future 21 cm perspectives
• Dark matter interacts with variable vacuum energy
• Gravitational Wave Opacity from Gauge Field Dark Energy
• Dynamical system approach to running $\Lambda$ cosmological models
• Dark energy constraints from ESPRESSO tests of the stability of fundamental couplings
• Inflation and the cosmological (not-so) constant in unimodular gravity
• Cluster Probes of Dark Energy Clustering
• Impact of early dark energy on the Planck SZ cluster sample
• Non-oscillating Early Dark Energy and Quintessence from Alpha-Attractors
• The probability distribution of cluster formation times and implied Einstein Radii
• Early dark energy constraints with late-time expansion marginalization
• Interacting Scalar fields: Dark matter and early dark energy
• The Hubble constant and dark energy from cosmological distance measures
• A gauge-invariant approach to interactions in the dark sector
• Towards a Solution to the H0 Tension: the Price to Pay
• Early dark energy and the screening mechanism
• Imprint of a Steep Equation of State in the growth of structure
• Inflaton-driven early dark energy
• Searching for dark energy in the matter-dominated era
• One-point probability distribution function from spherical collapse: Early Dark Energy (EDE) vs. $\Lambda$CDM
• Constraints on the Spacetime Dynamics of an Early Dark Energy Component
• Freezing Out Early Dark Energy
• Aller guten Dinge sind drei: Cosmology with three interacting spin-2 fields
• Can we distinguish early dark energy from a cosmological constant?
• Early dark energy constraints on growing neutrino quintessence cosmologies
• Addressing the $H_0$ tension through matter with pressure and no early dark energy
• Non-linear Structure Formation for Dark Energy Models with a Steep Equation of State
• One Extension to Explain Them All, One Scale-Invariant Spectrum to Test Them All, and in One Model Bind Them
• Phase-space analysis of torsion-coupled dilatonic ghost condensate
• Early Dark Energy During Big Bang Nucleosynthesis
• Dark energy as an elastic strain fluid
• Simple cosmological model with inflation and late times acceleration
• Early dark energy in the pre- and post-recombination epochs
• $H_0$ Without the Sound Horizon (or Supernovae): A 2% Measurement in DESI DR1
• The Herschel-SPIRE Legacy Survey (HSLS): the scientific goals of a shallow and wide submillimeter imaging survey with SPIRE
• Improving CMB constraints on early Universe physics with LSS: A multi-probe forecast including cross-covariance
• Observational effects of the early episodically dominating dark energy
• Theory Challenges of the Accelerating Universe
• Exploring Late-Time Cosmic Acceleration in VCDM Cosmology
• Pure Natural Quintessential Inflation and Dark Energy
• Onset of dark energy from cosmological scalarization and gravitational wave speed
• The peculiar case of the Viaggiu holographic dark energy
• Constraining Early Dark Energy cosmological models with Big Bang Nucleosynthesis
• Constraining Dark Energy Perturbations: the Role of Early Dark Energy