Subhalo abundance matching in f(R) gravity

He, Jian-hua; Li, Baojiu; Baugh, Carlton M.

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 fR0=−10−6, for which the cold dark matter clustering is very similar to the cold dark matter model with a cosmological constant (ΛCDM), the predicted clustering of galaxies in the f(R) model is very different from ΛCDM. 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.

Citation

He, J., Li, B., & Baugh, C. M. (2016). Subhalo abundance matching in f(R) gravity. Physical Review Letters, 117(22), Article 221101. https://doi.org/10.1103/physrevlett.117.221101

• Journal Article Type: Article
• Acceptance Date: Nov 1, 2016
• Online Publication Date: Nov 21, 2016
• Publication Date: Nov 21, 2016
• Deposit Date: Aug 21, 2016
• Publicly Available Date: Dec 7, 2016
• Journal: Physical Review Letters
• Print ISSN: 0031-9007
• Electronic ISSN: 1079-7114
• Publisher: American Physical Society
• Peer Reviewed: Peer Reviewed
• Volume: 117
• Issue: 22
• Article Number: 221101
• DOI: https://doi.org/10.1103/physrevlett.117.221101
• Related Public URLs: http://arxiv.org/abs/1605.04709