Probing scalar tensor theories for gravity in redshift space

¹ Korea Astronomy and Space Science Institute, Yuseong-gu, 305-348 Daejeon, Korea
e-mail: csabiu@kasi.re.kr
² School of Physics, Korea Institute for Advanced Study, Dongdaemun-gu, 130-722 Seoul, Korea
³ Institute of theoretical astrophysics, University of Oslo, 0315 Oslo, Norway
⁴ Institute for Computational Cosmology, Department of Physics, Durham University, Durham DH1 3LE, UK

Received: 18 November 2015
Accepted: 20 May 2016

Abstract

We present measurements of the spatial clustering statistics in redshift space of various scalar field modified gravity simulations. We utilise the two-point and three-point correlation functions to quantify the spatial distribution of dark matter halos within these simulations and thus discriminate between the models. We compare Λ cold dark matter (ΛCDM) simulations to various modified gravity scenarios and find consistency with previous work in terms of two-point statistics in real and redshift space. However, using higher-order statistics such as the three-point correlation function in redshift space we find significant deviations from ΛCDM hinting that higher-order statistics may prove to be a useful tool in the hunt for deviations from General Relativity.