Cosmological simulations with disformally coupled symmetron fields

Abstract

We investigate statistical properties of the distribution of matter at redshift zero in disformal gravity by using N-body simulations. The disformal model studied here consists of a conformally coupled symmetron field with an additional exponential disformal term. We conduct cosmological simulations to discover the impact of the new disformal terms in the matter power spectrum, halo mass function, and radial profile of the scalar field. We calculated the disformal geodesic equation and the equation of motion for the scalar field. We then implemented these equations into the N-body code ISIS, which is a modified gravity version of the code RAMSES. The presence of a conformal symmetron field increases both the power spectrum and mass function compared to standard gravity on small scales. Our main finding is that the newly added disformal terms tend to counteract these effects and can make the evolution slightly closer to standard gravity. We finally show that the disformal terms give rise to oscillations of the scalar field in the centre of the dark matter haloes.

arXiv commentUpdated version to reflect the journal accepted paper. Added one figure. 7 pages, 7 figures

References in corpus (44)

• Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
• Measurements of Omega and Lambda from 42 High-Redshift Supernovae
• Modified Gravity and Cosmology
• Cosmological Hydrodynamics with Adaptive Mesh Refinement: a new high resolution code called RAMSES
• The Rockstar Phase-Space Temporal Halo Finder and the Velocity Offsets of Cluster Cores
• Beyond the Cosmological Standard Model
• Symmetron Fields: Screening Long-Range Forces Through Local Symmetry Restoration
• The Relation between Physical and Gravitational Geometry
• Multiscale Gaussian Random Fields for Cosmological Simulations
• Environmental Dependence of Masses and Coupling Constants
• Correcting for the alias effect when measuring the power spectrum using FFT
• Search for TeV Gamma-ray Emission from GRB 100621A, an extremely bright GRB in X-rays, with H.E.S.S
• Disformal invariance of second order tensor-scalar theories: framing the Horndeski action
• Hydrodynamical N-body simulations of coupled dark energy cosmologies
• N-body Simulations for f(R) Gravity using a Self-adaptive Particle-Mesh Code
• Screening Modifications of Gravity through Disformally Coupled Fields
• CMB Anisotropies and Inflation from Non-Standard Spinors
• Dark Energy Condensation
• Disformal Transformations, Veiled General Relativity and Mimetic Gravity
• DBI Galileons in the Einstein Frame: Local Gravity and Cosmology
• ISIS: a new N-body cosmological code with scalar fields based on RAMSES. Code presentation and application to the shapes of clusters
• Releasing scalar fields: cosmological simulations of scalar-tensor theories for gravity beyond the static approximation
• Exploring Vainshtein mechanism on adaptively refined meshes
• Structure Formation in the Symmetron Model
• Disformal Inflation
• Disformal couplings and the dark sector of the universe
• Disformal Scalar Fields and the Dark Sector of the Universe
• Disformal Theories of Gravity: From the Solar System to Cosmology
• Constraining Disformally Coupled Scalar Fields
• A clear and measurable signature of modified gravity in the galaxy velocity field
• A Convenient Set of Comoving Cosmological Variables and Their Application
• Cosmological simulations of screened modified gravity out of the static approximation: effects on matter distribution
• Systematic simulations of modified gravity: chameleon models
• Cosmological Tests of the Disformal Coupling to Radiation
• N-body Simulations for Extended Quintessence Models
• Constraints on Disformal Couplings from the Properties of the Cosmic Microwave Background Radiation
• Towards Viable Cosmological Models of Disformal Theories of Gravity
• Microscopic and Macroscopic Behaviors of Palatini Modified Gravity Theories
• Disformal invariance of cosmological perturbations in a generalized class of Horndeski theories
• Effects of Biases in Domain Wall Network Evolution
• Domain walls coupled to matter: the symmetron example
• First experimental constraints on the disformally coupled Galileon model
• Disformal vectors and anisotropies on a warped brane
• Simulating the symmetron: domain walls and symmetry-restoring impurities

Cited by in corpus (20)

• Relativistic stars in scalar-tensor theories with disformal coupling
• Modelling Void Abundance in Modified Gravity
• Invertible disformal transformations with higher derivatives
• Gravitational transitions via the explicitly broken symmetron screening mechanism
• Disformally coupled inflation
• Simulation techniques for modified gravity
• Cosmic Tsunamis in Modified Gravity: Disruption of Screening Mechanisms from Scalar Waves
• Detecting Domain Walls in Laboratory Experiments
• Probing scalar tensor theories for gravity in redshift space
• Exact Geodesic Distances in FLRW Spacetimes
• Non-Gaussianity in multi-sound-speed disformally coupled inflation
• Stars disformally coupled to a shift-symmetric scalar field
• More about scalar gravity
• Euclid preparation. Simulations and nonlinearities beyond $\Lambda$CDM. 1. Numerical methods and validation
• Wave Propagation in Modified Gravity
• Potential-driven Inflation with Disformal Coupling to Gravity
• Testing modified gravity with globular clusters: the case of NGC 2419
• The slingshot effect as a probe of transverse motions of galaxies
• Tsunamis and Ripples: Effects of Scalar Waves on Screening in the Milky Way
• Non-linear Phenomenology of Disformally Coupled Quintessence