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Accurate method of modeling cluster scaling relations in modified gravity

Jian-hua He1,2,* and Baojiu Li2

  • 1INAF-Observatorio Astronomico, di Brera, Via Emilio Bianchi, 46, I-23807 Merate (LC), Italy
  • 2Institute for Computational Cosmology, Department of Physics, Durham University, Durham DH1 3LE, United Kingdom

  • *jianhua.he@durham.ac.uk
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Phys. Rev. D 93, 123512 – Published 8 June, 2016

DOI: https://doi.org/10.1103/PhysRevD.93.123512

Abstract

We propose a new method to model cluster scaling relations in modified gravity. Using a suite of nonradiative hydrodynamical simulations, we show that the scaling relations of accumulated 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 ΛCDM model with a precision of ∼3%. 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.

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Phys. Rev. D 93, 123512– Published 8 June, 2016
  • Received 1 September 2015

© 2016 American Physical Society

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