1. An emulator-based halo model in modified gravity – I. The halo concentration–mass relation and density profile.
- Author
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Ruan, Cheng-Zong, Cuesta-Lazaro, Carolina, Eggemeier, Alexander, Li, Baojiu, Baugh, Carlton M, Arnold, Christian, Bose, Sownak, Hernández-Aguayo, César, Zarrouk, Pauline, and Davies, Christopher T
- Subjects
LARGE scale structure (Astronomy) ,GALAXY clusters ,STATISTICAL correlation ,DARK energy ,GALACTIC halos ,PHYSICAL cosmology - 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 Ω
m0 , H0 , σ8 , and one MG parameter, either |$\bar{f}_{R0}$| or rc . Our halo property emulators achieve an accuracy of |${\lesssim}1\ \hbox{per cent}$| 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. [ABSTRACT FROM AUTHOR]- Published
- 2024
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