Artist: Fast radiative transfer for large-scale simulations of the epoch of reionization
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Date
2019
Authors
Journal Title
Journal ISSN
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Publisher
Oxford University Press
Abstract
We introduce the ‘Asymmetric Radiative Transfer In Shells Technique’ (ARTIST), a new method for photon propagation on large scales that explicitly conserves photons, propagates photons at the speed of light, approximately accounts for photon directionality, and closely reproduces results of more detailed radiative transfer (RT) methods. Crucially, it is computationally fast enough to evolve the large cosmological volumes required to predict the 21cm power spectrum on scales that will be probed by future experiments targeting the epoch of reionization (EoR). Most seminumerical models aimed at predicting the EoR 21cm signal on these scales use an excursion set formalism (ESF) to model the gas ionization, which achieves computational viability by making a number of approximations
Description
Keywords
radiative transfer, dark ages, reionization, first stars
Citation
Molaro, M. et al. (2019). Artist: Fast radiative transfer for large-scale simulations of the epoch of reionization, Monthly Notices of the Royal Astronomical Society, 489(4), 5594–5611. https://doi.org/10.1093/mnras/stz2171