The cosmological simulation code CONCEPT 1.0

Jeppe Dakin

doi:10.1093/mnras/stac568

2022-03-03

Jeppe Dakin *

Steen Hannestad

Thomas Tram

DOI：10.1093/mnras/stac568

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摘要

En 中文

We present version 1.0 of the cosmological simulation code CONCEPT, designed for simulations of large-scale structure formation. CONCEPT 1.0 contains a (PM)-M-3 gravity solver, with the short-range part implemented using a novel (sub)tiling strategy, coupled with individual and adaptive particle time-stepping. A primary objective of CONCEPT is ease of use. To this end, it has built-in initial condition generation and can produce output in the form of snapshots, power spectra, and direct visualizations. CONCEPT is the first massively parallel cosmological simulation code written in Python. Despite of this, excellent performance is obtained, even comparing favourably to other codes such as GADGET at similar precision, in the case of low to moderate clustering. By means of power-spectrum comparisons we find extraordinary good agreement between CONCEPT 1.0 and GADGET. At large and intermediate scales the codes agree to well below the per mille level, while the agreement at the smallest scales probed (k similar to 13 h Mpc(-1)) is of the order of 1 per cent. The CONCEPT code is openly released and comes with a robust installation script as well as thorough documentation.

Keyword:

cosmology: dark matter

cosmology: large-scale structure of Universe

software: simulations

期刊

Monthly Notices of the Royal Astronomical Society

IF:

4.8

论文数:

7.1W

被引数:

25.0W

机构

Aarhus University

学者数:

4.3W

论文数: 4.2W

被引数: 4.8W

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