PolyChord: nested sampling for cosmology
Cosmology and Nongalactic Astrophysics
2015-06-23 v3 Instrumentation and Methods for Astrophysics
Abstract
PolyChord is a novel nested sampling algorithm tailored for high dimensional parameter spaces. In addition, it can fully exploit a hierarchy of parameter speeds such as is found in CosmoMC and CAMB. It utilises slice sampling at each iteration to sample within the hard likelihood constraint of nested sampling. It can identify and evolve separate modes of a posterior semi-independently and is parallelised using openMPI. PolyChord is available for download at: http://ccpforge.cse.rl.ac.uk/gf/project/polychord/
Cite
@article{arxiv.1502.01856,
title = {PolyChord: nested sampling for cosmology},
author = {W. J. Handley and M. P. Hobson and A. N. Lasenby},
journal= {arXiv preprint arXiv:1502.01856},
year = {2015}
}
Comments
Accepted by MNRAS 2015 March 20. Received 2015 March 20; in original form 2015 February 6, 5 pages, 5 figures