An accurate method of modeling cluster scaling relations in modified gravity

TL;DR

This paper introduces a new, efficient method to model galaxy cluster scaling relations in modified gravity scenarios, achieving high accuracy by leveraging known $ m extLambda$CDM results and hydrodynamical simulations.

Contribution

The authors develop a novel approach that predicts cluster gas scaling relations in modified gravity with about 3% accuracy using simpler dark matter simulations.

Findings

Scaling relations can be predicted with ~3% precision.

Method reduces computational demand for modified gravity studies.

Results enable better constraints on gravity theories from cluster surveys.

Abstract

We propose a new method to model cluster scaling relations in modified gravity. Using a suite of non-radiative hydrodynamical simulations, we show that the scaling relations of cumulative gas quantities, such as the Sunyaev Zel'dovich effect (Compton-y parameter) and the x-ray Compton-Y parameter, can be accurately predicted using the known results in the $\Lambda$CDM model with a precision of $\sim3\%$. This method provides a reliable way to analyze the gas physics in modified gravity using the less-demanding and much more efficient pure cold dark matter simulations. Our results therefore have important theoretical and practical implications in constraining gravity using cluster surveys.