Conference Proceedings

Simultaneously constraining the astrophysics of reionisation and the epoch of heating with 21CMMC

Bradley Greig, Andrei Mesinger, V Jelic (ed.), T VanDerHulst (ed.)

PEERING TOWARDS COSMIC DAWN | CAMBRIDGE UNIV PRESS | Published : 2018

Abstract

We extend our MCMC sampler of 3D EoR simulations, 21CMMC, to perform parameter estimation directly on light-cones of the cosmic 21cm signal. This brings theoretical analysis one step closer to matching the expected 21-cm signal from next generation interferometers like HERA and the SKA. Using the light-cone version of 21CMMC, we quantify biases in the recovered astrophysical parameters obtained from the 21cm power spectrum when using the co-eval approximation to fit a mock 3D light-cone observation. While ignoring the light-cone effect does not bias the parameters under most assumptions, it can still underestimate their uncertainties. However, significant biases (∼few - 10 σ) are possible if..

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University of Melbourne Researchers