Journal Article

Particle-based sampling of <i>N</i>-body simulations

N. T. Faber, D. Stibbe, S. Portegies Zwart, S. L. W. McMillan and C. M. Boily

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 401, issue 3, pages 1898-1903
Published in print January 2010 | ISSN: 0035-8711
Published online January 2010 | e-ISSN: 1365-2966 | DOI: http://dx.doi.org/10.1111/j.1365-2966.2009.15775.x
Particle-based sampling of N-body simulations

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This paper introduces a novel approach for sampling the orbits of an N-body simulation. The gist of the method is to exploit individual phase-space coordinates acquired during integration of the equations of motion. This technique, which we dub ‘particle-based sampling scheme’, is tailor-made for resolving rapid time-variation of coordinates when needed. The PBaSS requires less disk space (by factors of 10 or more) to retrieve orbits at a chosen accuracy than those reconstructed using the classic snapshot approach. Furthermore, the PBaSS also allows a reconstruction of the system at any time-resolution not smaller than the smallest integration time-step in a post-simulation treatment, thus avoiding costly simulation reruns.

Keywords: methods: N-body simulations; methods: numerical; stars: kinematics

Journal Article.  4591 words.  Illustrated.

Subjects: Astronomy and Astrophysics

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