2023/01/08 by Ruan, Cheng-Zong, Cuesta-Lazaro, Carolina, Eggemeier, Alexander +7 · 1 citation
#Cosmology and Nongalactic Astrophysics (astro-ph.CO) #FOS: Physical sciences
paper · doi:10.48550/arxiv.2301.02970
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 Ωm0, H0, σ8, and one MG parameter, either fR0 or rc. Our halo property emulators achieve an accuracy of \lesssim 1% 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.