B. Falck
The Effect of Corner Modes in the Initial Conditions of Cosmological Simulations
Falck, B.; McCullagh, N.; Neyrinck, M.C.; Wang, J.; Szalay, A.S.
Authors
N. McCullagh
M.C. Neyrinck
J. Wang
A.S. Szalay
Abstract
In view of future high-precision large-scale structure surveys, it is important to quantify the percent and subpercent level effects in cosmological N-body simulations from which theoretical predictions are drawn. One such effect involves deciding whether to zero all modes above the one-dimensional Nyquist frequency, the so-called “corner” modes, in the initial conditions. We investigate this effect by comparing power spectra, density distribution functions, halo mass functions, and halo profiles in simulations with and without these modes. For a simulation with a mass resolution of mp ~ 1011 -h M 1 , we find that at z > 6, the difference in the matter power spectrum is large at wavenumbers above ∼80% of kNy, reducing to below 2% at all scales by z ~ 3. Including corner modes results in a better match between low- and high-resolution simulations at wavenumbers around the Nyquist frequency of the low-resolution simulation, but the effect of the corner modes is smaller than the effect of particle discreteness. The differences in mass functions are 3% for the smallest halos at z = 6 for the mp ~ 1011 -h M 1 simulation, but we find no significant difference in the stacked profiles of well-resolved halos at z 6. Thus removing power at ∣k∣ > kNy in the initial conditions of cosmological simulations has a small effect on small scales and high redshifts, typically below a few percent.
Citation
Falck, B., McCullagh, N., Neyrinck, M., Wang, J., & Szalay, A. (2017). The Effect of Corner Modes in the Initial Conditions of Cosmological Simulations. Astrophysical Journal, 837(2), Article 181. https://doi.org/10.3847/1538-4357/aa60c7
Journal Article Type | Article |
---|---|
Acceptance Date | Feb 13, 2017 |
Online Publication Date | Mar 16, 2017 |
Publication Date | Mar 16, 2017 |
Deposit Date | Jul 11, 2017 |
Publicly Available Date | Mar 28, 2024 |
Journal | Astrophysical Journal |
Print ISSN | 0004-637X |
Electronic ISSN | 1538-4357 |
Publisher | American Astronomical Society |
Peer Reviewed | Peer Reviewed |
Volume | 837 |
Issue | 2 |
Article Number | 181 |
DOI | https://doi.org/10.3847/1538-4357/aa60c7 |
Files
Published Journal Article
(2.6 Mb)
PDF
Copyright Statement
© 2017. The American Astronomical Society. All rights reserved.
You might also like
Density-dependent clustering – I. Pullingback the curtains on motions of the BAO peak
(2018)
Journal Article
The cosmic spiderweb: equivalence of cosmic, architectural and origami tessellations
(2018)
Journal Article
The lensing and temperature imprints of voids on the cosmic microwave background
(2016)
Journal Article
Downloadable Citations
About Durham Research Online (DRO)
Administrator e-mail: dro.admin@durham.ac.uk
This application uses the following open-source libraries:
SheetJS Community Edition
Apache License Version 2.0 (http://www.apache.org/licenses/)
PDF.js
Apache License Version 2.0 (http://www.apache.org/licenses/)
Font Awesome
SIL OFL 1.1 (http://scripts.sil.org/OFL)
MIT License (http://opensource.org/licenses/mit-license.html)
CC BY 3.0 ( http://creativecommons.org/licenses/by/3.0/)
Powered by Worktribe © 2024
Advanced Search