Dark energy constraints in light of theoretical priors
arXiv:2507.19450 · doi:10.1088/1475-7516/2026/01/054
Abstract
In order to derive model-independent observational bounds on dark energy/modified gravity theories, a typical approach is to constrain parametrised models intended to capture the space of dark energy theories. Here we investigate in detail the effect that the nature of these parametrisations can have, finding significant effects on the resulting cosmological dark energy constraints. In order to observationally distinguish well-motivated and physical parametrisations from unphysical ones, it is crucial to understand the theoretical priors that physical parametrisations place on the phenomenology of dark energy. To this end we discuss a range of theoretical priors that can be imposed on general dark energy parametrisations, and their effect on the constraints on the phenomenology of dynamical dark energy. More specifically, we investigate both the phenomenological parametrisation as well as effective field theory (EFT) inspired approaches to model dark energy interactions. We compare the constraints obtained in both approaches for different phenomenological and theory-informed time-dependences for the underlying functional degrees of freedom, discuss the effects of priors derived from gravitational wave physics, and investigate the interplay between constraints on parameters constraining only the background evolution vs. parameters controlling linear perturbations.
arXiv comment21 pages + appendices and references, 26 figures. v2: typos corrected, references added. v3: added Fig. 18 showing constraints on expansion history with DESI DR2 BAO data assuming an EFTDE model, and a few clarifications; version accepted to JCAP
References in corpus (100)
- emcee: The MCMC Hammer
- GW170817: Observation of Gravitational Waves from a Binary Neutron Star Inspiral
- Multi-messenger Observations of a Binary Neutron Star Merger
- Cosmological Imprint of an Energy Component with General Equation of State
- Gravitational Waves and Gamma-rays from a Binary Neutron Star Merger: GW170817 and GRB 170817A
- 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
- Cosmology and the Fate of Dilatation Symmetry
- Exploring the Expansion History of the Universe
- Accelerating Universes with Scaling Dark Matter
- The Cosmic Linear Anisotropy Solving System (CLASS) II: Approximation schemes
- A Dynamical Solution to the Problem of a Small Cosmological Constant and Late-time Cosmic Acceleration
- An Ordinary Short Gamma-Ray Burst with Extraordinary Implications: Fermi-GBM Detection of GRB 170817A
- The Completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: Cosmological Implications from two Decades of Spectroscopic Surveys at the Apache Point observatory
- Generalized G-inflation: Inflation with the most general second-order field equations
- Dark Energy Survey Year 3 Results: Cosmological Constraints from Galaxy Clustering and Weak Lensing
- Planck 2018 results. V. CMB power spectra and likelihoods
- From k-essence to generalised Galileons
- DESI 2024 VI: Cosmological Constraints from the Measurements of Baryon Acoustic Oscillations
- Evidence for Reionization at z ~ 6: Detection of a Gunn-Peterson Trough in a z=6.28 Quasar
- Cosmology with Ultra-light Pseudo-Nambu-Goldstone Bosons
- INTEGRAL Detection of the First Prompt Gamma-Ray Signal Coincident with the Gravitational Wave Event GW170817
- Conservative Constraints on Early Cosmology: an illustration of the Monte Python cosmological parameter inference code
- Planck 2018 results. VIII. Gravitational lensing
- Euclid. I. Overview of the Euclid mission
- DESI DR2 Results II: Measurements of Baryon Acoustic Oscillations and Cosmological Constraints
- The Effective Field Theory of Dark Energy
- General second order scalar-tensor theory, self tuning, and the Fab Four
- k-Essence, superluminal propagation, causality and emergent geometry
- Maximal freedom at minimum cost: linear large-scale structure in general modifications of gravity
- The Completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: Baryon acoustic oscillations with Lyman- forests
- Efficient Photometric Selection of Quasars from the Sloan Digital Sky Survey: II. ~1,000,000 Quasars from Data Release Six
- Dark Energy or Modified Gravity? An Effective Field Theory Approach
- The Completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: measurement of the BAO and growth rate of structure of the luminous red galaxy sample from the anisotropic power spectrum between redshifts 0.6 and 1.0
- The Completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: BAO and RSD measurements from the anisotropic power spectrum of the Quasar sample between redshift 0.8 and 2.2
- The Clustering of the SDSS Main Galaxy Sample II: Mock galaxy catalogues and a measurement of the growth of structure from Redshift Space Distortions at
- GetDist: a Python package for analysing Monte Carlo samples
- Dynamical Lambda Models of Structure Formation
- 2MASS Photometric Redshift catalog: a comprehensive three-dimensional census of the whole sky
- Gravitational Rainbows: LIGO and Dark Energy at its Cutoff
- A unifying description of dark energy
- Cosmological parameters derived from the final (PR4) Planck data release
- Photometric redshifts for the SDSS Data Release 12
- CFHTLenS: Testing the Laws of Gravity with Tomographic Weak Lensing and Redshift Space Distortions
- hi_class: Horndeski in the Cosmic Linear Anisotropy Solving System
- Limits of Quasi-Static Approximation in Modified-Gravity Cosmologies
- On the evolution of density perturbations in f(R) theories of gravity
- WISE x SuperCOSMOS photometric redshift catalog: 20 million galaxies over 3pi steradians
- Scant evidence for thawing quintessence
- What can Cosmology tell us about Gravity? Constraining Horndeski with Sigma and Mu
- Constraints on Shift-Symmetric Scalar-Tensor Theories with a Vainshtein Mechanism from Bounds on the Time Variation of G
- Chronology Protection in Galileon Models and Massive Gravity
- Cosmological parameter constraints for Horndeski scalar-tensor gravity
- Hints of Nonminimally Coupled Gravity in DESI 2024 Baryon Acoustic Oscillation Measurements
- Matching current observational constraints with nonminimally coupled dark energy
- Relativistic scalar fields and the quasi-static approximation in theories of modified gravity
- Dark-Energy Instabilities induced by Gravitational Waves
- Cosmological Constraints on Horndeski Gravity in Light of GW170817
- Positivity in the sky
- Robustness of dark energy phenomenology across different parameterizations
- An Updated Tomographic Analysis of the Integrated Sachs-Wolfe Effect and implications for Dark Energy
- Assessing cosmological evidence for non-minimal coupling
- Large-scale structure phenomenology of viable Horndeski theories
- Validating estimates of the growth rate of structure with modified gravity simulations
- hi_class: Background Evolution, Initial Conditions and Approximation Schemes
- Nonlinear Effective Theory of Dark Energy
- KiDS+GAMA: Constraints on Horndeski gravity from combined large-scale structure probes
- Dark Energy and Modified Gravity in the Effective Field Theory of Large-Scale Structure
- A general theory of linear cosmological perturbations: scalar-tensor and vector-tensor theories
- Is the Effective Field Theory of Dark Energy Effective?
- Positivity Bounds on Dark Energy: When Matter Matters
- Designing Horndeski and the effective fluid approach
- Measuring the propagation speed of gravitational waves with LISA
- Challenges in Connecting Modified Gravity Theory and Observations
- Cosmological constraints on dark energy in light of gravitational wave bounds
- Observational signatures of modified gravity on ultra-large scales
- A general theory of linear cosmological perturbations: stability conditions, the quasistatic limit and dynamics
- Modified Gravity Constraints from the Full Shape Modeling of Clustering Measurements from DESI 2024
- Optimising growth of structure constraints on modified gravity
- Parametrizing modified gravity for cosmological surveys
- Fast and accurate predictions of the nonlinear matter power spectrum for general models of Dark Energy and Modified Gravity
- Cosmological Constraints on sub-horizon scales modified gravity theories with MGCLASS II
- Is the CDM cosmological parameterization evidence for dark energy dynamics partially caused by the excess smoothing of Planck CMB anisotropy data?
- Testing gravitational wave propagation with multiband detections
- Cosmological gravity on all scales II: Model independent modified gravity -body simulations
- : Fast, approximate simulations of structure formation in Horndeski gravity
- Enabling matter power spectrum emulation in beyond-CDM cosmologies with COLA
- Cosmological gravity on all scales: simple equations, required conditions, and a framework for modified gravity
- Probing the speed of gravity with LVK, LISA, and joint observations
- Theoretical priors in scalar-tensor cosmologies: Thawing quintessence
- Planck-PR4 anisotropy spectra show (better) consistency with General Relativity
- Horndeski under the quantum loupe
- Studying large-scale structure probes of modified gravity with COLA
- Constraining the cosmological evolution of scalar-tensor theories with local measurements of the time variation of G
- Testing the Speed of Gravity with Black Hole Ringdown
- Radiative stability and observational constraints on dark energy and modified gravity
- Scalar-tensor cosmologies without screening
- Positivity bounds on reconstructed Horndeski models
- Exploring Modified Gravity: Constraints on the and Parametrization with WMAP, ACT, and SPT
- A novel probe of graviton dispersion relations at nano-Hertz frequencies