Open AccessParticle‐based sampling of N ‐body simulations
Author(s) -
Faber N. T.,
Stibbe D.,
Zwart S. Portegies,
McMillan S. L. W.,
Boily C. M.
Publication year - 2010
Publication title -
monthly notices of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.058
H-Index - 383
eISSN - 1365-2966
pISSN - 0035-8711
DOI - 10.1111/j.1365-2966.2009.15775.x
Subject(s) - physics , phase space , snapshot (computer storage) , sampling (signal processing) , exploit , algorithm , numerical integration , classical mechanics , mathematics , mathematical analysis , computer science , optics , computer security , detector , operating system , thermodynamics
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.