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Title:
Application of the Ewald method to cosmological N-body simulations
Authors:
Hernquist, Lars; Bouchet, Francois R.; Suto, Yasushi
Affiliation:
AA(Princeton University Observatory, NJ; Lick Observatory, Santa Cruz, CA), AB(CNRS, Institut d'Astrophysique, Paris, France), AC(Princeton University Observatory, NJ; Ibaraki University, Mito; Hiroshima University, Japan)
Publication:
Astrophysical Journal Supplement Series (ISSN 0067-0049), vol. 75, Feb. 1991, p. 231-240. Research supported by David and Lucille Packard Foundation. (ApJS Homepage)
Publication Date:
02/1991
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
Computational Astrophysics, Galactic Structure, Hubble Constant, Many Body Problem, Astronomical Models, Boundary Conditions, Spatial Resolution
DOI:
10.1086/191530
Bibliographic Code:
1991ApJS...75..231H

Abstract

Fully periodic boundary conditions are incorporated into a gridless cosmological N-body code using the Ewald method. It is shown that the linear evolution of density fluctuations agrees well with analytic calculations, contrary to the case of quasi-periodic boundary conditions where the fundamental mode grows too rapidly. The implementation of fully periodic boundaries is of particular importance to relative comparisons of methods based on hierarchical tree algorithms and more traditional schemes using Fourier techniques such as PM and P3M codes.

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