Fast and accurate predictions of the nonlinear matter power spectrum for general models of Dark Energy and Modified Gravity

Abstract

We embed linear and nonlinear parametrisations of beyond standard cosmological physics in the halo model reaction framework, providing a model-independent prescription for the nonlinear matter power spectrum. As an application, we focus on Horndeski theories, using the Effective Field Theory of Dark Energy (EFTofDE) to parameterise linear and quasi-nonlinear perturbations. In the nonlinear regime we investigate both a nonlinear parameterised-post Friedmannian (nPPF) approach as well as a physically motivated and approximate phenomenological model based on the error function (Erf). We compare the parameterised approaches' predictions of the nonlinear matter power spectrum to the exact solutions, as well as state-of-the-art emulators, in an evolving dark energy scenario and two well studied modified gravity models, finding sub-percent agreement in the reaction using the Erf model at $z\le 1$ and $k\le 5h/\mathrm{Mpc}$. This suggests only an additional 3 free constants, above the background and linear theory parameters, are sufficient to model nonlinear, non-standard cosmology in the matter power spectrum at scales down to $k\le 3h/\mathrm{Mpc}$ within $2\%$ accuracy. We implement the parametrisations into ver.2.0 of the ReACT code.

Journal accepted version. 21 pages, 10 figures. Download ReACT v2: https://github.com/nebblu/ACTio-ReACTio

References in corpus (35)

• The Confrontation between General Relativity and Experiment
• Gravitational Waves and Gamma-rays from a Binary Neutron Star Merger: GW170817 and GRB 170817A
• Models of f(R) Cosmic Acceleration that Evade Solar-System Tests
• The DESI Experiment Part I: Science,Targeting, and Survey Design
• Causality, Analyticity and an IR Obstruction to UV Completion
• Dark Energy after GW170817: dead ends and the road ahead
• Strong constraints on cosmological gravity from GW170817 and GRB 170817A
• Implications of the Neutron Star Merger GW170817 for Cosmological Scalar-Tensor Theories
• Imperfect Dark Energy from Kinetic Gravity Braiding
• Maximal freedom at minimum cost: linear large-scale structure in general modifications of gravity
• Non-linear Evolution of f(R) Cosmologies III: Halo Statistics
• The 4D Einstein-Gauss-Bonnet Theory of Gravity: A Review
• COSMOPOWER: emulating cosmological power spectra for accelerated Bayesian inference from next-generation surveys
• Effective Field Theory of Cosmic Acceleration: constraining dark energy with CMB data
• Dynamical Masses in Modified Gravity
• Lectures on the Cosmological Constant Problem
• The Parameterized Post-Friedmannian Framework for Interacting Dark Energy Theories
• Constraining chameleon models with cosmology
• Testing Screened Modified Gravity
• On the road to percent accuracy IV: ReACT -- computing the non-linear power spectrum beyond $\Lambda$CDM
• Positivity Bounds on Dark Energy: When Matter Matters
• K-mouflage Cosmology: Formation of Large-Scale Structures
• Measuring the propagation speed of gravitational waves with LISA
• FORGE -- the f(R) gravity cosmic emulator project I: Introduction and matter power spectrum emulator
• On the road to percent accuracy V: the non-linear power spectrum beyond $\Lambda$CDM with massive neutrinos and baryonic feedback
• A parametrisation of modified gravity on nonlinear cosmological scales
• Accelerating Large-Scale-Structure data analyses by emulating Boltzmann solvers and Lagrangian Perturbation Theory
• Causality in gravitational theories with second order equations of motion
• Classifying Linearly Shielded Modified Gravity Models in Effective Field Theory
• Fast full $N$-body simulations of generic modified gravity: derivative coupling models
• $\text{Hi-COLA}$: Fast, approximate simulations of structure formation in Horndeski gravity
• Enabling matter power spectrum emulation in beyond-$\Lambda$CDM cosmologies with COLA
• Fast generation of mock galaxy catalogues in modified gravity models with COLA
• A minimal self tuning model to solve the cosmological constant problem
• On tachyonic stability priors for dark energy

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• Euclid preparation LXXI. Simulations and nonlinearities beyond $\mathsf{\Lambda }$CDM. 3. Constraints on $f(R)$ models from the photometric primary probes
• Constraining Scale Dependent Growth with Redshift Surveys
• DeepSSM: an emulator of gravitational wave spectra from sound waves during cosmological first-order phase transitions
• Principal Components for Model-Agnostic Modified Gravity with 3x2pt
• Cosmological gravity on all scales IV: 3x2pt Fisher forecasts for pixelised phenomenological modified gravity
• Dark energy constraints in light of theoretical priors
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• Cosmological gravity on all scales V: MCMC forecasts combining large scale structure and CMB lensing for binned phenomenological modified gravity
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