Work

Treecode2: the power of pluralism – I. Static tests

Year: 2026

Type: article

Abstract: ABSTRACT I describe an ‘oct-tree’ N-body code that randomly shifts, reorients, and resizes the root cell at each time-step. Averaging over a plurality of root cell positions and orientations statistically restores translational and rotational invariance. The potentials and forces that result can be much more accurate than those obtained from a single force calculation. In this paper, the principle of averaging is tested on static configurations. The next paper will show how this technique can substantially improve global energy, momentum, and angular momentum conservation at a negligible computational cost.

Source: Monthly Notices of the Royal Astronomical Society

DOI: 10.1093/mnras/stag272

Author: Joshua E Barnes

Institution: University of Hawaiʻi at Mānoa

Language: English

Topic: Galaxies: Formation, Evolution, Phenomena

Subfield: Astronomy and Astrophysics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $3,046

Funder: National Science Foundation