Rapid simulation rescaling from standard to modified gravity models

Abstract

We develop and test an algorithm to rescale a simulated dark-matter particle distribution or halo catalogue from a standard gravity model to that of a modified gravity model. This method is based on that of Angulo & White but with some additional ingredients to account for (i) scale-dependent growth of linear density perturbations and (ii) screening mechanisms that are generic features of viable modified gravity models. We attempt to keep the method as general as possible, so that it may plausibly be applied to a wide range of modified theories, although tests against simulations are restricted to a subclass of $f(R)$ models at this stage. We show that rescaling allows the power spectrum of matter to be reproduced at the $\sim 3$ per cent level in both real and redshift space up to $k=0.1h{\mathrm{Mpc}}^{-1}$ if we change the box size and alter the particle displacement field; this limit can be extended to $k=1h{\mathrm{Mpc}}^{-1}$ if we additionally alter halo internal structure. We simultaneously develop an algorithm that can be applied directly to a halo catalogue, in which case the halo mass function and clustering can be reproduced at the $\sim 5$ per cent level. Finally we investigate the clustering of halo particle distributions, generated from rescaled halo catalogues, and find that a similar accuracy can be reached.

19 pages, 13 figures, accepted for publication in MNRAS, v3 - closely matches published version

References in corpus (16)

• Models of f(R) Cosmic Acceleration that Evade Solar-System Tests
• Astrophysics Source Code Library
• f(R) Gravity and Chameleon Theories
• Cluster Constraints on f(R) Gravity
• Non-linear evolution of f(R) cosmologies II: power spectrum
• N-body Simulations for f(R) Gravity using a Self-adaptive Particle-Mesh Code
• Non-linear evolution of f(R) cosmologies I: methodology
• Dynamical Masses in Modified Gravity
• Testing chameleon gravity with the Coma cluster
• Constraining chameleon models with cosmology
• Constraining models of $f(R)$ gravity with Planck and WiggleZ power spectrum data
• Simulations of Weak Gravitational Lensing - II : Including Finite Support Effects in Cosmic Shear Covariance Matrices
• Scaling relations and mass bias in hydrodynamical f(R) gravity simulations of galaxy clusters
• Cosmological constraints from the CFHTLenS shear measurements using a new, accurate and flexible way of predicting nonlinear mass clustering
• A Fast Route to Non-Linear Clustering Statistics in Modified Gravity Theories
• Remapping simulated halo catalogues in redshift space

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