English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

We present a large suite of cosmological simulations, the FORGE (F-of-RGravity Emulator) simulation suite, which is designed to build accurateemulators for cosmological observables in galaxy clustering, weak gravitationallensing and galaxy clusters, for the $f(R)$ gravity model. The total of 200simulations explore the cosmological parameter space around the Planck(2018)cosmology with a Latin hypercube, for 50 combinations of $\bar{f}_{R0}$,$\Omega_m$, $\sigma_8$ and $h$ with all other parameters fixed. For eachparameter combination, or node, we ran four independent simulations, one pairusing $1024^3$ particles in $500 h^{-1} Mpc$ simulation boxes to cover smallscales, and another pair using $512^3$ simulation particles in $1500 h^{-1}Mpc$ boxes for larger scales. Each pair of initial conditions are selected suchthat sample variance on large scales is minimised on average. In this work wepresent an accurate emulator for the matter power spectrum in $f(R)$ gravitytrained on FORGE. We have verified, using the cross-validation technique, thatthe emulator accuracy is better than $2.5\%$ for the majority of nodes,particularly around the center of the explored parameter space, up to scales of$k = 10 h Mpc^{-1}$. We have also checked the power spectrum emulator againstsimulations which are not part of our training set and found excellentagreement. Due to its high accuracy on small scales, the FORGE matter powerspectrum emulator is well suited for weak lensing analysis and can play a keytool in constraining $f(R)$ gravity using current and future observationaldata.

FORGE -- the f(R) gravity cosmic emulator project I: Introduction and matter power spectrum emulator