N-Body Simulations for Coupled Scalar Field Cosmology

Abstract

We describe in detail the general methodology and numerical implementation of consistent N-body simulations for coupled scalar field cosmological models, including the background cosmology and the generation of initial conditions (with the different couplings to different matter species taken into account). We perform fully consistent simulations for a class of coupled scalar field models with an inverse power-law potential and negative coupling constant, for which the chameleon mechanism does not operate. We find that in such cosmological models the scalar-field potential plays a negligible role except in the background expansion, and the fifth force that is produced is proportional to gravity in magnitude, justifying the use of a rescaled gravitational constant G in some earlier N-body simulations of similar models. We study the effects of the scalar coupling on the nonlinear matter power spectra and compare with linear perturbation calculations to investigate where the nonlinear model deviates from the linear approximation. For the first time, the algorithm to identify gravitationally virialized matter halos is adapted to the scalar field cosmology, and then used to measure the mass function and study the properties of virialized halos. We find that the net effect of the scalar coupling helps produce more heavy halos in our simulation boxes and suppresses the inner (but not the outer) density profile of halos compared with those predicted by lambda-CDM, while this suppression weakens as the coupling between the scalar field and dark matter particles increases in strength.

28 pages, 14 figures. For a high resolution version see http://www.damtp.cam.ac.uk/user/bl267/Li_Barrow/N_body_coupled_scalar.pdf

References in corpus (19)

• Dynamics of dark energy
• Cosmology and the Fate of Dilatation Symmetry
• Evading Equivalence Principle Violations, Cosmological and other Experimental Constraints in Scalar Field Theories with a Strong Coupling to Matter
• Dynamics of dark energy with a coupling to dark matter
• The speed of the `bullet' in the merging galaxy cluster 1E0657-56
• The Dilaton and Modified Gravity
• Non-linear evolution of f(R) cosmologies II: power spectrum
• Non-linear evolution of f(R) cosmologies I: methodology
• Constraining Interactions in Cosmology's Dark Sector
• Tidal Tails Test the Equivalence Principle in the Dark Sector
• The Growth of Structure in Interacting Dark Energy Models
• Adiabatic instability in coupled dark energy-dark matter models
• Galilean Equivalence for Galactic Dark Matter
• Accurate estimators of power spectra in N-body simulations
• A New Force in the Dark Sector?
• Nonlinear growth in modified gravity theories of dark energy
• Dark Matter Gravitational Clustering With a Long-Range Scalar Interaction
• Galaxy Satellites and the Weak Equivalence Principle
• Cosmological simulations using a static scalar-tensor theory

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