A high-fidelity realization of the Euclid code comparison N-body simulation with Abacus
Abstract
Abstract We present a high-fidelity realization of the cosmological N-body simulation from the Schneider et al. code comparison project. The simulation was performed with our AbacusN-body code, which offers high-force accuracy, high performance, and minimal particle integration errors. The simulation consists of 20483 particles in a $$500\ h^{-1}\, \mathrm{Mpc}$$ box for a particle mass of $$1.2\times 10^9\ h^{-1}\, \mathrm{M}_\odot$$ with $$10\ h^{-1}\, \mathrm{kpc}$$ spline softening. Abacus executed 1052 global time-steps to z = 0 in 107 h on one dual-Xeon, dual-GPU node, for a mean rate of 23 million particles per second per step. We find Abacus is in good agreement with Ramses and Pkdgrav3 and less so with Gadget3. We validate our choice of time-step by halving the step size and find sub-percent differences in the power spectrum and 2PCF at nearly all measured scales, with $${\lt }0.3{{\ \rm per\ cent}}$$ errors at $$k\lt 10\ \mathrm{Mpc}^{-1}\, h$$. On large scales, Abacus reproduces linear theory better than 0.01 per cent. Simulation snapshots are available at http://nbody.rc.fas.harvard.edu/public/S2016.
- Authors:
-
[1];
- Harvard-Smithsonian Center for Astrophysics, 60 Garden St., Cambridge, MA 02138, USA
- Steward Observatory, University of Arizona, 933 N. Cherry Ave., Tucson, AZ 85121, USA
- Publication Date:
- Research Org.:
- Harvard Univ., Cambridge, MA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC); National Science Foundation (NSF)
- OSTI Identifier:
- 1501948
- Alternate Identifier(s):
- OSTI ID: 1612029
- Grant/Contract Number:
- SC0013718; AST-1313285
- Resource Type:
- Published Article
- Journal Name:
- Monthly Notices of the Royal Astronomical Society
- Additional Journal Information:
- Journal Name: Monthly Notices of the Royal Astronomical Society Journal Volume: 485 Journal Issue: 3; Journal ID: ISSN 0035-8711
- Publisher:
- Royal Astronomical Society
- Country of Publication:
- United Kingdom
- Language:
- English
- Subject:
- 79 ASTRONOMY AND ASTROPHYSICS; astronomy & astrophysics; methods: numerical; large-scale structure of universe
Citation Formats
Garrison, Lehman H., Eisenstein, Daniel J., and Pinto, Philip A. A high-fidelity realization of the Euclid code comparison N-body simulation with Abacus. United Kingdom: N. p., 2019.
Web. doi:10.1093/mnras/stz634.
Garrison, Lehman H., Eisenstein, Daniel J., & Pinto, Philip A. A high-fidelity realization of the Euclid code comparison N-body simulation with Abacus. United Kingdom. https://doi.org/10.1093/mnras/stz634
Garrison, Lehman H., Eisenstein, Daniel J., and Pinto, Philip A. Thu .
"A high-fidelity realization of the Euclid code comparison N-body simulation with Abacus". United Kingdom. https://doi.org/10.1093/mnras/stz634.
@article{osti_1501948,
title = {A high-fidelity realization of the Euclid code comparison N-body simulation with Abacus},
author = {Garrison, Lehman H. and Eisenstein, Daniel J. and Pinto, Philip A.},
abstractNote = {Abstract We present a high-fidelity realization of the cosmological N-body simulation from the Schneider et al. code comparison project. The simulation was performed with our AbacusN-body code, which offers high-force accuracy, high performance, and minimal particle integration errors. The simulation consists of 20483 particles in a $500\ h^{-1}\, \mathrm{Mpc}$ box for a particle mass of $1.2\times 10^9\ h^{-1}\, \mathrm{M}_\odot$ with $10\ h^{-1}\, \mathrm{kpc}$ spline softening. Abacus executed 1052 global time-steps to z = 0 in 107 h on one dual-Xeon, dual-GPU node, for a mean rate of 23 million particles per second per step. We find Abacus is in good agreement with Ramses and Pkdgrav3 and less so with Gadget3. We validate our choice of time-step by halving the step size and find sub-percent differences in the power spectrum and 2PCF at nearly all measured scales, with ${\lt }0.3{{\ \rm per\ cent}}$ errors at $k\lt 10\ \mathrm{Mpc}^{-1}\, h$. On large scales, Abacus reproduces linear theory better than 0.01 per cent. Simulation snapshots are available at http://nbody.rc.fas.harvard.edu/public/S2016.},
doi = {10.1093/mnras/stz634},
journal = {Monthly Notices of the Royal Astronomical Society},
number = 3,
volume = 485,
place = {United Kingdom},
year = {Thu Mar 07 00:00:00 EST 2019},
month = {Thu Mar 07 00:00:00 EST 2019}
}
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https://doi.org/10.1093/mnras/stz634
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