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arXiv · 1605.04709

Subhalo abundance matching in $f(R)$ gravity

Jian-Hua He·Baojiu Li·Carlton M. Baugh
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Abstract

Using the liminality N-body simulations of Shi et. al., we present the first predictions for galaxy clustering in $f(R)$ gravity using subhalo abundance matching. We find that, for a given galaxy density, even for an $f(R)$ model with $f_{R0}=-10^{-6}$, for which the cold dark matter clustering is very similar to $Λ$CDM, the predicted clustering of galaxies in the $f(R)$ model is very different from $Λ$CDM. The deviation can be as large as $40\%$ for samples with mean densities close to that of $L_*$ galaxies. This large deviation is testable given the accuracy that future large-scale galaxy surveys aim to achieve. Our result demonstrates that galaxy surveys can provide a stringent test of General Relativity on cosmological scales, which is comparable to the tests from local astrophysical observations.

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Jian-Hua He, Baojiu Li, Carlton M. Baugh. 2016-11-03. Subhalo abundance matching in $f(R)$ gravity. https://doi.org/10.1103/physrevlett.117.221101

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