Robustness of dark energy phenomenology across different parameterizations

Abstract

The recent evidence for dynamical dark energy from DESI, in combination with other cosmological data, has generated significant interest in understanding the nature of dark energy and its underlying microphysics. However, interpreting these results critically depends on how dark energy is parameterized. This paper examines the robustness of conclusions about the viability of particular kinds of dynamical dark energy models to the choice of parameterization, focusing on four popular two-parameter models: the Chevallier-Polarski-Linder (CPL), Jassal-Bagla-Padmanabhan (JBP), Barboza-Alcaniz (BA), and exponential (EXP) parameterizations. We find that conclusions regarding the viability of minimally and non-minimally coupled quintessence models are independent of the parameterization adopted. We demonstrate this both by mapping these dark energy models into the $(w_0,w_a)$ parameter space defined by these various parameterizations and by showing that all of these parameterizations can equivalently account for the phenomenology predicted by these dark energy models to a high degree of accuracy.

Updated to match published version in JCAP

References in corpus (93)

• SciPy 1.0--Fundamental Algorithms for Scientific Computing in Python
• The NumPy array: a structure for efficient numerical computation
• The Cosmological Constant and Dark Energy
• Cosmological parameters from CMB and other data: a Monte-Carlo approach
• Exploring the Expansion History of the Universe
• Accelerating Universes with Scaling Dark Matter
• Planck 2018 results. X. Constraints on inflation
• The Cosmic Linear Anisotropy Solving System (CLASS) II: Approximation schemes
• A Comprehensive Measurement of the Local Value of the Hubble Constant with 1 km/s/Mpc Uncertainty from the Hubble Space Telescope and the SH0ES Team
• Dark Energy and the Accelerating Universe
• Coupled Quintessence
• Planck 2018 results. V. CMB power spectra and likelihoods
• DESI 2024 VI: Cosmological Constraints from the Measurements of Baryon Acoustic Oscillations
• The Pantheon+ Analysis: The Full Dataset and Light-Curve Release
• Cobaya: Code for Bayesian Analysis of hierarchical physical models
• Efficient sampling of fast and slow cosmological parameters
• Dark Energy vs. Modified Gravity
• Maximal freedom at minimum cost: linear large-scale structure in general modifications of gravity
• The Atacama Cosmology Telescope: DR6 Gravitational Lensing Map and Cosmological Parameters
• The Atacama Cosmology Telescope: A Measurement of the DR6 CMB Lensing Power Spectrum and its Implications for Structure Growth
• Constraining the equation of state of the Universe from Distant Type Ia Supernovae and Cosmic Microwave Background Anisotropies
• Observational constraints on low redshift evolution of dark energy: How consistent are different observations?
• A parametric model for dark energy
• Type Ia Supernova Distances at z > 1.5 from the Hubble Space Telescope Multi-Cycle Treasury Programs: The Early Expansion Rate
• Thawing quintessence with a nearly flat potential
• Distance Priors from Planck Final Release
• Gravitational Lensing as a Probe of Quintessence
• The Dynamics of Quintessence, The Quintessence of Dynamics
• Cosmic microwave background measurements can discriminate among inflation models
• hi_class: Horndeski in the Cosmic Linear Anisotropy Solving System
• Update on Coupled Dark Energy and the $H_0$ tension
• The Paths of Quintessence
• Robust Preference for Dynamical Dark Energy in DESI BAO and SN Measurements
• Interacting Dark Energy after DESI Baryon Acoustic Oscillation measurements
• Assessing observational constraints on dark energy
• Interpreting DESI's evidence for evolving dark energy
• Nonparametric late-time expansion history reconstruction and implications for the Hubble tension in light of recent DESI and type Ia supernovae data
• Scant evidence for thawing quintessence
• Dark Energy Models in the w - w' Plane
• Quintessential interpretation of the evolving dark energy in light of DESI
• Updated Cosmological Constraints in Extended Parameter Space with Planck PR4, DESI Baryon Acoustic Oscillations, and Supernovae: Dynamical Dark Energy, Neutrino Masses, Lensing Anomaly, and the Hubble Tension
• Hilltop Quintessence
• Using non-DESI data to confirm and strengthen the DESI 2024 spatially-flat $w_0{w}_a$CDM cosmological parameterization result
• Interpreting DESI 2024 BAO: late-time dynamical dark energy or a local effect?
• Probing the curvature and dark energy
• Underdetermination of dark energy
• Matching current observational constraints with nonminimally coupled dark energy
• Evidence for Emergent Dark Energy
• Neutrino cosmology after DESI: tightest mass upper limits, preference for the normal ordering, and tension with terrestrial observations
• Can dark energy be dynamical?
• A new diagnostic for the null test of dynamical dark energy in light of DESI 2024 and other BAO data
• General Analytic Solutions of Scalar Field Cosmology with Arbitrary Potential
• Model-agnostic assessment of dark energy after DESI DR1 BAO
• hi_class: Background Evolution, Initial Conditions and Approximation Schemes
• Union Through UNITY: Cosmology with 2,000 SNe Using a Unified Bayesian Framework
• A New Class of Parametrization for Dark Energy without Divergence
• Quantifying Scalar Field Dynamics with DESI 2024 Y1 BAO measurements
• Mapping the Chevallier-Polarski-Linder parametrization onto Physical Dark Energy Models
• Acceleration of the universe: a reconstruction of the effective equation of state
• Model-independent cosmological inference post DESI DR1 BAO measurements
• On hilltop and brane inflation after Planck
• Quintessence's Last Stand?
• Dynamical dark energy in the light of DESI 2024 data
• Quintessence in a quandary: prior dependence in dark energy models
• Dynamical dark energy confronted with multiple CMB missions
• Imprints of an extended Chevallier-Polarski-Linder parametrization on the large scale of our universe
• Dark energy in light of recent DESI BAO and Hubble tension
• New parametrization of the dark-energy equation of state with a single parameter
• Consistency tests between SDSS and DESI BAO measurements
• Theoretical priors in scalar-tensor cosmologies: Thawing quintessence
• Kick it like DESI: PNGB quintessence with a dynamically generated initial velocity
• Constraining constant and tomographic coupled dark energy with low-redshift and high-redshift probes
• Scalar-Tensor Gravity and DESI 2024 BAO data
• Dark energy reconstructions combining BAO data with galaxy clusters and intermediate redshift catalogs
• Phase-space analysis of dark energy models in non-minimally coupled theories of gravity
• DESI constraints on $\alpha$-attractor inflationary models
• Minimizing the tensor-to-scalar ratio in single-field inflation models
• General parametrization for energy density of quintessence field
• Exploring cosmological imprints of phantom crossing with dynamical dark energy in Horndeski gravity
• Cosmological Instabilities and the Role of Matter Interactions in Dynamical Dark Energy Models
• Is excess smoothing of Planck CMB ansiotropy data partially responsible for evidence for dark energy dynamics in other $w(z)$CDM parametrizations?
• Towards primordial gravitational waves and $n_s=1$ in light of BICEP/Keck, DESI BAO and Hubble tension
• The axis of systematic bias in SN~Ia cosmology and implications for DESI 2024 results
• New simple and accurate quintessence approximations
• Cosmic distance duality after DESI 2024 data release and dark energy evolution
• Impact of evolving dark energy on the search for primordial gravitational waves
• Navigating permanent underdetermination in dark energy and inflationary cosmology
• Constraints on Redshift-Binned Dark Energy using DESI BAO Data
• Quintessence: an analytical study, with theoretical and observational applications
• Do Observations Prefer Thawing Quintessence?
• Reconstructing the dark energy density in light of DESI BAO observations
• Modified gravity bridges the cosmological tensions
• A Critical Reanalysis of Supernova Type Ia Data

Cited by in corpus (49)

• The CosmoVerse White Paper: Addressing observational tensions in cosmology with systematics and fundamental physics
• Cosmology in Extended Parameter Space with DESI Data Release 2 Baryon Acoustic Oscillations: A 2$\sigma$+ Detection of Nonzero Neutrino Masses with an Update on Dynamical Dark Energy and Lensing Anomaly
• Assessing cosmological evidence for non-minimal coupling
• Quintessence and phantoms in light of DESI 2025
• Pressure Parametrization of Dark Energy: First and Second-Order Constraints with Latest Cosmological Data
• DESI results: Hint towards coupled dark matter and dark energy
• Physical vs phantom dark energy after DESI: thawing quintessence in a curved background
• Is Dark Energy Dynamical in the DESI Era? A Critical Review
• Cosmological constraints on Galileon dark energy with broken shift symmetry
• Cosmological constraints on nonphantom dynamical dark energy with DESI Data Release 2 Baryon Acoustic Oscillations: A 3$\sigma$+ lensing anomaly
• Optimal parameterizations for observational constraints on thawing dark energy
• Examining Quintessence Models with DESI Data
• Cosmographic Footprints of Dynamical Dark Energy
• Does DESI DR2 challenge $\Lambda$CDM paradigm ?
• Robust Evidence for Dynamical Dark Energy from DESI Galaxy-CMB Lensing Cross-Correlation and Geometric Probes
• Improved null tests of $\Lambda$CDM and FLRW in light of DESI DR2
• Interacting dark energy after DESI DR2: a challenge for $\Lambda$CDM paradigm?
• III. Interacting Dark Energy: Summary of Models, Pathologies, and Constraints
• Neutrino mass tension or suppressed growth rate of matter perturbations?
• Inflationary attractors and radiative corrections in light of ACT data
• Non-minimally coupled gravity constraints from DESI DR2 data
• Constraints on Dark Energy Models Using Late Universe Probes
• Constraints on Barrow and Tsallis Holographic Dark Energy from DESI DR2 BAO data
• Shape of Dark Energy: Constraining Its Evolution with a General Parametrization
• Cosmological implications of tracker scalar fields: Testing the evidence for dynamical dark energy with recent data
• II. Non-Linear Interacting Dark Energy: Analytical Solutions and Theoretical Pathologies
• Beyond Two Parameters: Revisiting Dark Energy with the Latest Cosmic Probes
• Metastability in Emergent Dark Energy: A New Framework Confronting Cosmological Observations
• Revisiting CPL with sign-switching density: To cross or not to cross the NECB
• I. Linear Interacting Dark Energy: Analytical Solutions and Theoretical Pathologies
• Late-time Background Constraints on Linear and Non-linear Interacting Dark Energy after DESI DR2
• Evidence for evolving dark energy from DESI DR2 BAO and Pantheon${}^{+}$, DES-Dovekie, and Union3
• A New Window on Dynamical Dark Energy: Combining DESI-DR2 BAO with future Gravitational Wave Observations
• Is Chevallier-Polarski-Linder dark energy a mirage?
• Addressing the DESI DR2 Phantom-Crossing Anomaly and Enhanced $H_0$ Tension with Reconstructed Scalar-Tensor Gravity
• How Much NEC Breaking Can the Universe Endure?
• Unified dark fluid with null sound speed as an alternative to phantom dark energy
• Updated Cosmological Constraints from 2D BAO Measurements: A New Compilation and Comparison with DESI DR2
• Lowering the Horizon on Dark Energy: A Late-Time Response to Early Solutions for the Hubble Tension
• A short review on Quintom dark energy theory
• Is Dark Energy Changing? Probing the Universe's Expansion with present and future astronomical probes
• Cosmological Constraints on Neutrino Masses in a Second-Order CPL Dark Energy Model
• Why $w\ne -1$? Anthropic Selection in a $\Lambda$ + Axion Dark Energy Model
• Dark energy constraints in light of theoretical priors
• Revisiting the equation of state of dark energy from DESI BAO with SNe Ia and CMB
• Modifying $\Lambda$CDM dynamics via out-of-equilibrium axions: reconciling SH0ES and DESI $H_0$ values
• Thermodynamic reconstruction in observationally constrained dynamical dark energy models
• How to embed any likelihood into SBI: Application to Planck + Stage IV galaxy surveys and Dynamical Dark Energy
• Is the $\Lambda$CDM Model in Crisis?