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CosmoMC: Cosmological MonteCarlo

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CosmoMC: Cosmological MonteCarlo

Postby owlice » Wed Jun 29, 2011 3:28 pm

CosmoMC: Cosmological MonteCarlo

Abstract: We present a fast Markov Chain Monte-Carlo exploration of cosmological parameter space. We perform a joint analysis of results from recent CMB experiments and provide parameter constraints, including sigma_8, from the CMB independent of other data. We next combine data from the CMB, HST Key Project, 2dF galaxy redshift survey, supernovae Ia and big-bang nucleosynthesis. The Monte Carlo method allows the rapid investigation of a large number of parameters, and we present results from 6 and 9 parameter analyses of flat models, and an 11 parameter analysis of non-flat models. Our results include constraints on the neutrino mass (m_nu < 0.3eV), equation of state of the dark energy, and the tensor amplitude, as well as demonstrating the effect of additional parameters on the base parameter constraints. In a series of appendices we describe the many uses of importance sampling, including computing results from new data and accuracy correction of results generated from an approximate method. We also discuss the different ways of converting parameter samples to parameter constraints, the effect of the prior, assess the goodness of fit and consistency, and describe the use of analytic marginalization over normalization parameters.

Credit: Lewis, Antony; Bridle, Sarah

Site: https://cosmologist.info/cosmomc/
https://ui.adsabs.harvard.edu/abs/2002PhRvD..66j3511L

Bibcode: 2011ascl.soft06025L

Preferred citation method: Please see citation information here: https://cosmologist.info/cosmomc/readme.html#Reference

ID: ascl:1106.025
Last edited by Ada Coda on Sat Jul 27, 2019 8:29 pm, edited 1 time in total.
Reason: Updated code entry.
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