Optimal Smoothing for N-Body Codes
Astrophysics
2009-10-28 v2
Abstract
In any collisionless N-body code, there is an optimal choice for the smoothing parameter that minimizes the average error in the force evaluations. We show how to compute the optimal softening length in a direct-summation code and demonstrate that it varies roughly as 1/N^(1/3).
Cite
@article{arxiv.astro-ph/9511146,
title = {Optimal Smoothing for N-Body Codes},
author = {David Merritt},
journal= {arXiv preprint arXiv:astro-ph/9511146},
year = {2009}
}
Comments
6 TEX pages, 3 PostScript figures, uses AASTEX, epsf.sty. Submitted to The Astronomical Journal, November 1995; revised January 1996