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 study and model the properties of galaxy clusters in the normal-branchDvali-Gabadadze-Porrati (nDGP) model of gravity, which is representative of awide class of theories which exhibit the Vainshtein screening mechanism. Usingthe first cosmological simulations which incorporate both full baryonic physicsand nDGP, we find that, despite being efficiently screened within clusters, thefifth force can raise the temperature of the intra-cluster gas, affecting thescaling relations between the cluster mass and three observable mass proxies:the gas temperature, the Compton $Y$-parameter of the Sunyaev-Zel'dovich effectand the X-ray analogue of the $Y$-parameter. Therefore, unless properlyaccounted for, this could lead to biased measurements of the cluster mass intests that make use of cluster observations, such as cluster number counts, toprobe gravity. Using a suite of dark-matter-only simulations, which span a widerange of box sizes and resolutions, and which feature very different strengthsof the fifth force, we also calibrate general fitting formulae which canreproduce the nDGP halo concentration at percent accuracy for $0\leq z\leq1$,and halo mass function with $\lesssim3\%$ accuracy at $0\leq z\leq1$(increasing to $\lesssim5\%$ for $1\leq z\leq 2$), over a halo mass rangespanning four orders of magnitude. Our model for the concentration can be usedfor converting between halo mass overdensities and predicting statistics suchas the nonlinear matter power spectrum. The results of this work will form partof a framework for unbiased constraints of gravity using the data from ongoingand upcoming cluster surveys.

A general framework to test gravity using galaxy clusters IV: Cluster and halo properties in DGP gravity