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Cited by 657

The DOI matches its Crossref record; 44 of the 44 references it cites were found in a registry or an index.

Transients from initial conditions in cosmological simulations

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Crocce, M., Pueblas, S., Scoccimarro, R.·2006·Monthly Notices of the Royal Astronomical Society
DOI 10.1111/j.1365-2966.2006.11040.x
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Abstract

We study the impact of setting initial conditions in numerical simulations using the standard procedure based on the Zel'dovich approximation (ZA).As it is well known from the perturbation theory, ZA initial conditions have incorrect second-and higher-order growth and therefore excite long-lived transients in the evolution of the statistical properties of density and velocity fields.We also study the improvement brought by using more accurate initial conditions based on second-order Lagrangian perturbation theory (2LPT).We show that 2LPT initial conditions reduce transients significantly and thus are much more appropriate for numerical simulations devoted to precision cosmology.Using controlled numerical experiments with ZA and 2LPT initial conditions, we show that simulations started at redshift z i = 49 using the ZA underestimate the power spectrum in the non-linear regime by about 2, 4 and 8 per cent at z = 0, 1, and 3, respectively, whereas the mass function of dark matter haloes is underestimated by 5 per cent at m = 10 15 M h -1 (z = 0) and 10 per cent at m = 2 × 10 14 M h -1 (z = 1).The clustering of haloes is also affected to the few per cent level at z = 0.These systematics effects are typically larger than statistical uncertainties in recent mass function and power spectrum fitting formulae extracted from numerical simulations.At large scales, the measured transients in higher-order correlations can be understood from first principle calculations based on perturbation theory.

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Metadata

Authors
Crocce, M., Pueblas, S., & Scoccimarro, R.
Venue
Monthly Notices of the Royal Astronomical Society
Publisher
Oxford University Press (OUP)
Published
2006-11-21
Volume
373
Issue
1
Pages
369-381
ISSN
  • 0035-8711 (ISSN-L)
  • 1365-2966
DOI
10.1111/j.1365-2966.2006.11040.x
OpenAlex
W2029234737
Cited by
657
References
44
FWCI
10.61
Type
journal article
Language
en
Open access
bronze

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CoChat. (2026). Citation check: Transients from initial conditions in cosmological simulations. https://app.cochat.ai/papers/10.1111/j.1365-2966.2006.11040.x
The paper
Crocce, M., Pueblas, S., & Scoccimarro, R. (2006). Transients from initial conditions in cosmological simulations. Monthly Notices of the Royal Astronomical Society. https://doi.org/10.1111/j.1365-2966.2006.11040.x

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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.