Cheng-Zong Ruan
Fast full N-body simulations of generic modified gravity: conformal coupling models
Ruan, Cheng-Zong; Hernández-Aguayo, César; Li, Baojiu; Arnold, Christian; Baugh, Carlton M; Klypin, Anatoly; Prada, Francisco
Authors
César Hernández-Aguayo
Professor Baojiu Li baojiu.li@durham.ac.uk
Professor
Christian Arnold
Carlton M Baugh
Anatoly Klypin
Francisco Prada
Abstract
We present mg-glam, a code developed for the very fast production of full N-body cosmological simulations in modified gravity (MG) models. We describe the implementation, numerical tests and first results of a large suite of cosmological simulations for three classes of MG models with conformal coupling terms: the f(R) gravity, symmetron and coupled quintessence models. Derived from the parallel particle-mesh code glam, mg-glamincorporates an efficient multigrid relaxation technique to solve the characteristic nonlinear partial differential equations of these models. For f(R) gravity, we have included new variants to diversify the model behaviour, and we have tailored the relaxation algorithms to these to maintain high computational efficiency. In a companion paper, we describe versions of this code developed for derivative coupling MG models, including the Vainshtein- and K-mouflage-type models. mg-glam can model the prototypes for most MG models of interest, and is broad and versatile. The code is highly optimised, with a tremendous speedup of a factor of more than a hundred compared with earlier N-body codes, while still giving accurate predictions of the matter power spectrum and dark matter halo abundance. mg-glam is ideal for the generation of large numbers of MG simulations that can be used in the construction of mock galaxy catalogues and the production of accurate emulators for ongoing and future galaxy surveys.
Citation
Ruan, C., Hernández-Aguayo, C., Li, B., Arnold, C., Baugh, C. M., Klypin, A., & Prada, F. (2022). Fast full N-body simulations of generic modified gravity: conformal coupling models. Journal of Cosmology and Astroparticle Physics, 2022(5), Article 18. https://doi.org/10.1088/1475-7516/2022/05/018
Journal Article Type | Article |
---|---|
Acceptance Date | Mar 16, 2022 |
Online Publication Date | May 11, 2022 |
Publication Date | 2022 |
Deposit Date | Oct 27, 2021 |
Publicly Available Date | Jul 7, 2022 |
Journal | Journal of Cosmology and Astroparticle Physics |
Publisher | IOP Publishing |
Peer Reviewed | Peer Reviewed |
Volume | 2022 |
Issue | 5 |
Article Number | 18 |
DOI | https://doi.org/10.1088/1475-7516/2022/05/018 |
Public URL | https://durham-repository.worktribe.com/output/1232644 |
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2022 The Author(s). Published by IOP Publishing
Ltd on behalf of Sissa Medialab. Original content from
this work may be used under the terms of the Creative Commons
Attribution 4.0 licence. Any further distribution of this work must
maintain attribution to the author(s) and the title of the work,
journal citation and DOI.
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