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An emulator-based halo model in modified gravity – I. The halo concentration–mass relation and density profile

Ruan, Cheng-Zong; Cuesta-Lazaro, Carolina; Eggemeier, Alexander; Li, Baojiu; Baugh, Carlton M; Arnold, Christian; Bose, Sownak; Hernández-Aguayo, César; Zarrouk, Pauline; Davies, Christopher T

An emulator-based halo model in modified gravity – I. The halo concentration–mass relation and density profile Thumbnail


Authors

Cheng-Zong Ruan

Carolina Cuesta-Lazaro

Alexander Eggemeier

Christian Arnold

Sownak Bose

César Hernández-Aguayo

Christopher T Davies



Abstract

In this series of papers, we present an emulator-based halo model for the non-linear clustering of galaxies in modified gravity cosmologies. In the first paper, we present emulators for the following halo properties: the halo mass function, concentration– mass relation and halo-matter cross-correlation function. The emulators are trained on data extracted from the FORGE and BRIDGE suites of N-body simulations, respectively, for two modified gravity (MG) theories: f(R) gravity, and the DGP model, varying three standard cosmological parameters m0, H0, σ8, and one MG parameter, either f¯ R0 or rc. Our halo property emulators achieve an accuracy of 1 per cent on independent test data sets. We demonstrate that the emulators can be combined with a galaxy–halo connection prescription to accurately predict the galaxy–galaxy and galaxy–matter correlation functions
using the halo model framework.

Citation

Ruan, C., Cuesta-Lazaro, C., Eggemeier, A., Li, B., Baugh, C. M., Arnold, C., …Davies, C. T. (in press). An emulator-based halo model in modified gravity – I. The halo concentration–mass relation and density profile. Monthly Notices of the Royal Astronomical Society, 527(2), 2490–2507. https://doi.org/10.1093/mnras/stad3021

Journal Article Type Article
Acceptance Date Oct 2, 2023
Online Publication Date Oct 10, 2023
Deposit Date Feb 1, 2024
Publicly Available Date Feb 1, 2024
Journal Monthly Notices of the Royal Astronomical Society
Print ISSN 0035-8711
Publisher Royal Astronomical Society
Peer Reviewed Peer Reviewed
Volume 527
Issue 2
Pages 2490–2507
DOI https://doi.org/10.1093/mnras/stad3021
Public URL https://durham-repository.worktribe.com/output/2189472

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