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Title:
On the reliability of N-body simulations
Authors:
Boekholt, Tjarda; Portegies Zwart, Simon
Affiliation:
AA(Leiden Observatory, Leiden University, Leiden, The Netherlands), AB(Leiden Observatory, Leiden University, Leiden, The Netherlands)
Publication:
Computational Astrophysics and Cosmology, Volume 2, article id.2, 21 pp.
Publication Date:
03/2015
Origin:
SPRINGER
Abstract Copyright:
(c) 2015: Boekholt and Portegies Zwart; licensee Springer
DOI:
10.1186/s40668-014-0005-3
Bibliographic Code:
2015ComAC...2....2B

Abstract

The general consensus in the N-body community is that statistical results of an ensemble of collisional N-body simulations are accurate, even though individual simulations are not. A way to test this hypothesis is to make a direct comparison of an ensemble of solutions obtained by conventional methods with an ensemble of true solutions. In order to make this possible, we wrote an N-body code called Brutus, that uses arbitrary-precision arithmetic. In combination with the Bulirsch-Stoer method, Brutus is able to obtain converged solutions, which are true up to a specified number of digits.
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