Christian Arnold
Simulating galaxy formation in f(R) modified gravity: Matter, halo, and galaxy-statistics
Arnold, Christian; Li, Baojiu
Abstract
We present an analysis of the matter, halo and galaxy clustering in f(R)-gravity employing the SHYBONE full-physics hydrodynamical simulation suite. Our analysis focuses on the interplay between baryonic feedback and f(R)-gravity in the matter power spectrum, the matter and halo correlation functions, the halo and galaxy-host-halo mass function, the subhalo and satellite-galaxy count and the correlation function of the stars in our simulations. Our studies of the matter power spectrum in full physics simulations in f(R)-gravity show, that it will be very difficult to derive accurate fitting formulae for the power spectrum enhancement in f(R)-gravity which include baryonic effects. We find that the enhancement of the halo mass function due to f(R)-gravity and its suppression due to feedback effects do not show significant back-reaction effects and can thus be estimated from independent GR-hydro and f(R) dark matter only simulations. Our simulations furthermore show, that the number of subhaloes and satellite-galaxies per halo is not significantly affected by f(R)-gravity. Low mass haloes are nevertheless more likely to be populated by galaxies in f(R)-gravity. This suppresses the clustering of stars and the galaxy correlation function in the theory compared to standard cosmology.
Citation
Arnold, C., & Li, B. (2019). Simulating galaxy formation in f(R) modified gravity: Matter, halo, and galaxy-statistics. Monthly Notices of the Royal Astronomical Society, 490(2), 2507-2520. https://doi.org/10.1093/mnras/stz2690
Journal Article Type | Article |
---|---|
Acceptance Date | Sep 22, 2019 |
Online Publication Date | Sep 27, 2019 |
Publication Date | Dec 31, 2019 |
Deposit Date | Sep 23, 2019 |
Publicly Available Date | Oct 4, 2019 |
Journal | Monthly Notices of the Royal Astronomical Society |
Print ISSN | 0035-8711 |
Electronic ISSN | 1365-2966 |
Publisher | Royal Astronomical Society |
Peer Reviewed | Peer Reviewed |
Volume | 490 |
Issue | 2 |
Pages | 2507-2520 |
DOI | https://doi.org/10.1093/mnras/stz2690 |
Public URL | https://durham-repository.worktribe.com/output/1285900 |
Related Public URLs | https://arxiv.org/abs/1907.02980 |
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Copyright Statement
This article has been accepted for publication in the Monthly notices of the Royal Astronomical Society ©: 2019 The Author(s). Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.
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