K-mouflage Cosmology: Formation of Large-Scale Structures

Abstract

We study structure formation in K-mouflage cosmology whose main feature is the absence of screening effect on quasilinear scales. We show that the growth of structure at the linear level is affected by both a new time dependent Newton constant and a friction term which depend on the background evolution. These combine with the modified background evolution to change the growth rate by up to ten percent since $z\sim 2$. At the one loop level, we find that the nonlinearities of the K-mouflage models are mostly due to the matter dynamics and that the scalar perturbations can be treated at tree level. We also study the spherical collapse in K-mouflage models and show that the critical density contrast deviates from its $\Lambda$-CDM value and that, as a result, the halo mass function is modified for large masses by an order one factor. Finally we consider the deviation of the matter spectrum from $\Lambda$-CDM on nonlinear scales where a halo model is utilized. We find that the discrepancy peaks around $1h{\mathrm{Mpc}}^{-1}$ with a relative difference which can reach fifty percent. Importantly, these features are still true at larger redshifts, contrary to models of the chameleon-$f(R)$ and Galileon types.

arXiv comment24 pages

References in corpus (24)

• A Universal Density Profile from Hierarchical Clustering
• Dynamics of dark energy
• Nine-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Parameter Results
• Cosmology and fundamental physics with the Euclid satellite
• k-Mouflage gravity
• The nonlinear matter and velocity power spectra in f(R) gravity
• Nonlinear structure formation in the Cubic Galileon gravity model
• Integrated Sachs-Wolfe effect in Cross-Correlation: The Observer's Manual
• Exploring Vainshtein mechanism on adaptively refined meshes
• Systematic simulations of modified gravity: symmetron and dilaton models
• Simulating the quartic Galileon gravity model on adaptively refined meshes
• Nonlinear Structure Formation with the Environmentally Dependent Dilaton
• Modified Gravity Tomography
• The integrated Sachs-Wolfe Effect -- Large Scale Structure Correlation
• Screening fifth forces in k-essence and DBI models
• Systematic simulations of modified gravity: chameleon models
• Impact on the power spectrum of Screening in Modified Gravity Scenarios
• A Map of the Integrated Sachs-Wolfe Signal from Luminous Red Galaxies
• Chameleon Dark Energy
• Structure Formation in Modified Gravity Scenarios
• Matter power spectrum from a Lagrangian-space regularization of perturbation theory
• Mass functions and bias of dark matter halos
• Accuracy of analytical models of the large-scale matter distribution
• ISW-LSS cross-correlation in coupled Dark Energy models with massive neutrinos

Cited by in corpus (43)

• Beyond the Cosmological Standard Model
• A local resolution of the Hubble tension: The impact of screened fifth forces on the cosmic distance ladder
• Weak lensing by voids in modified lensing potentials
• The Novel Probes Project -- Tests of Gravity on Astrophysical Scales
• Dark-Energy Instabilities induced by Gravitational Waves
• Nonlinear structure formation in Nonlocal Gravity
• The Santiago-Harvard-Edinburgh-Durham void comparison II: unveiling the Vainshtein screening using weak lensing
• Weak Lensing Light-Cones in Modified Gravity simulations with and without Massive Neutrinos
• Speeding up $N$-body simulations of modified gravity: Chameleon screening models
• A Fast Route to Non-Linear Clustering Statistics in Modified Gravity Theories
• Galaxy cluster lensing masses in modified lensing potentials
• A parametrisation of modified gravity on nonlinear cosmological scales
• $N$-body simulations for parametrised modified gravity
• The Classical Symmetron Force in Casimir Experiments
• 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
• Testing Modified Gravity with Cosmic Shear
• Fast full $N$-body simulations of generic modified gravity: derivative coupling models
• Weak lensing by galaxy troughs with modified gravity
• Cluster gas fraction as a test of gravity
• Cosmological tests of modified gravity: constraints on $F(R)$ theories from the galaxy clustering ratio
• K-mouflage gravity models that pass Solar System and cosmological constraints
• Equivalence of cosmological observables in conformally related scalar tensor theories
• Small-scale Nonlinear Dynamics of K-mouflage Theories
• K-mouflage effects on clusters of galaxies
• Scalar Fields Near Compact Objects: Resummation versus UV Completion
• RAY-RAMSES: a code for ray tracing on the fly in N-body simulations
• K-mouflage Imprints on Cosmological Observables and Data Constraints
• The Quantum Field Theory of K-mouflage
• Linear perturbations in K-mouflage cosmologies with massive neutrinos
• 3D Weak Lensing: Modified Theories of Gravity
• Euclid: Constraining linearly scale-independent modifications of gravity with the spectroscopic and photometric primary probes
• The effective field theory of K-mouflage
• Cosmological Probes of Structure Growth and Tests of Gravity
• Charged Dark Matter and the $H_0$ tension
• Environmental screening of dark matter haloes in $f(R)$ gravity
• Double screening
• Goldstone models of modified gravity
• Dark energy with a shift-symmetric scalar field: obstacles, loophole hunting and dead ends
• Explaining JWST star formation history at $z\sim 17$ by modifying $\Lambda$CDM
• Ultra-local models of modified gravity without kinetic term
• K-mouflage at high $k$: extending the reach of $\text{Hi-COLA}$
• Lyman-alpha power spectrum as a probe of modified gravity