Modified gravity N-body code comparison project
Winther, H.A.; Schmidt, F.; Barreira, A.; Arnold, C.; Bose, S.; Llinares, C.; Baldi, M.; Falck, B.; Hellwing, W.A.; Koyama, K.; Li, B.; Mota, D.F.; Puchwein, E.; Smith, R.; Zhao, G.
Professor Baojiu Li email@example.com
Self-consistent N-body simulations of modified gravity models are a key ingredient to obtain rigorous constraints on deviations from general relativity using large-scale structure observations. This paper provides the first detailed comparison of the results of different N-body codes for the f (R), Dvali–Gabadadze–Porrati and Symmetron models, starting from the same initial conditions. We find that the fractional deviation of the matter power spectrum from Λ cold dark matter agrees to better than 1 per cent up to k ∼ 5–10 h Mpc−1 between the different codes. These codes are thus able to meet the stringent accuracy requirements of upcoming observational surveys. All codes are also in good agreement in their results for the velocity divergence power spectrum, halo abundances and halo profiles. We also test the quasi-static limit, which is employed in most modified gravity N-body codes, for the Symmetron model for which the most significant non-static effects among the models considered are expected. We conclude that this limit is a very good approximation for all of the observables considered here.
Winther, H., Schmidt, F., Barreira, A., Arnold, C., Bose, S., Llinares, C., …Zhao, G. (2015). Modified gravity N-body code comparison project. Monthly Notices of the Royal Astronomical Society, 454(4), 4208-4234. https://doi.org/10.1093/mnras/stv2253
|Journal Article Type||Article|
|Acceptance Date||Sep 25, 2015|
|Publication Date||Dec 21, 2015|
|Deposit Date||Aug 17, 2015|
|Publicly Available Date||Nov 20, 2015|
|Journal||Monthly Notices of the Royal Astronomical Society|
|Publisher||Royal Astronomical Society|
|Peer Reviewed||Peer Reviewed|
|Keywords||Large-scale structure of Universe.|
|Related Public URLs||http://arxiv.org/abs/1506.06384|
Published Journal Article
This article has been accepted for publication in Monthly notices of the Royal Astronomical Society. ©: 2015 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.
You might also like
Upscaling ExaHyPE – on each and every core
Galaxy clustering from the bottom up: A Streaming Model emulator I
Higher order initial conditions with massive neutrinos
Fingerprints of modified gravity on galaxies in voids