This brief code paper presents a new Python-wrapped version of the popular 21cm cosmology simulator, 21cmFAST. The new version, v3+, maintains the same core functionality of previous versions of 21cmFAST, but features a simple and intuitive interface, and a great deal more flexibility. This evolution represents the work of a formalized collaboration, and the new version, available publicly on GitHub, provides a single point-of-reference for all future upgrades and community-added features. In this paper, we describe simple usage of 21cmFAST, some of its new features, and provide a simple performance benchmark.
@article{arxiv.2010.15121,
title = {21cmFAST v3: A Python-integrated C code forgenerating 3D realizations of the cosmic 21cm signal},
author = {Steven G. Murray and Bradley Greig and Andrei Mesinger and Julian B. Muñoz and Yuxiang Qin and Jaehong Park and Catherine A. Watkinson},
journal= {arXiv preprint arXiv:2010.15121},
year = {2020}
}