An extensible MCMC framework for 21cmFAST.
This code uses semantic versioning, though this will strictly begin when v1.0.0 is officially shipped.
- Free software: MIT license
- Seamless integration with
emcee-based MCMC. - Supports the
MultiNestsampler. - Supports the
zeussampler. - MCMC is easily extensible via the addition of different likelihoods using the same underlying data.
This plot shows the number of test models (see details here) performed using the MultiNest sampler as a function of thread number, illustrating an almost ideal scalability where #model per human hour scales linearly with #thread. There are three runs for each thread number, which are indicated by the filled circles with errorbar. The double sided arrows show the relative (w.r.t. the 24-thread case) loss when scaling up the calculation. Note that a typical inference study, working with more complex models and therefore performing much fewer models per human hour, is expected to remain the same level of scalability.
See https://21CMMC.readthedocs.org.
If you find 21CMMC useful in your research please cite at least one of the following (whichever is most suitable to you):
Bradley Greig and Andrei Mesinger, "21CMMC: an MCMC analysis tool enabling astrophysical parameter studies of the cosmic 21 cm signal", Monthly Notices of the Royal Astronomical Society, Volume 449, Issue 4, p.4246-4263 (2015), https://doi.org/10.1093/mnras/stv571
Bradley Greig and Andrei Mesinger, "Simultaneously constraining the astrophysics of reionization and the epoch of heating with 21CMMC", Monthly Notices of the Royal Astronomical Society, Volume 472, Issue 3, p.2651-2669 (2017), https://doi.org/10.1093/mnras/stx2118
Bradley Greig and Andrei Mesinger, "21CMMC with a 3D light-cone: the impact of the co-evolution approximation on the astrophysics of reionization and cosmic dawn", Monthly Notices of the Royal Astronomical Society, Volume 477, Issue 3, p.3217-3229 (2018), https://doi.org/10.1093/mnras/sty796
Jaehong Park et al., "Inferring the astrophysics of reionization and cosmic dawn from galaxy luminosity functions and the 21-cm signal", Monthly Notices of the Royal Astronomical Society, Volume 484, Issue 1, p.933-949 (2018), https://doi.org/10.1093/mnras/stz032