Journal article

A hybrid multiresolution scheme to efficiently model the structure of reionization on the largest scales

Han-Seek Kim, J Stuart B Wyithe, Jaehong Park, Gregory B Poole, CG Lacey, CM Baugh



Redshifted 21-cm measurements of the structure of ionized regions that grow during reionization promise to provide a new probe of early galaxy and structure formation. One of the challenges of modelling reionization is to account both for the subhalo scale physics of galaxy formation and the regions of ionization on scales that are many orders of magnitude larger. To bridge this gap we first calculate the statistical relationship between ionizing luminosity and Mpc-scale overdensity using detailed models of galaxy formation computed using relatively small volume - (~100 Mpc h-1)3, high-resolution dark matter simulations. We then use a Monte Carlo technique to apply this relationship to reion..

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University of Melbourne Researchers


Awarded by Discovery Early Career Researcher Awards from the Australian Research Council

Funding Acknowledgements

H-SK is supported by a Discovery Early Career Researcher Awards from the Australian Research Council (DE140100940). The Centre for All-sky Astrophysics is an Australian Research Council Centre of Excellence, funded by grant CE110001020. CMB acknowledges receipt of a Research Fellowship from the Leverhulme Trust. This work was supported in part by the Science and Technology Facilities Council rolling grant to the ICC. The Millennium, Millennium II, and Millennium-MXXL simulations were carried out by the Virgo Consortium at the supercomputer centre of the Max Planck Society in Garching. Calculations for this paper were partly performed on the ICC Cosmology Machine, which is part of the DiRAC Facility jointly funded by STFC, the Large Facilities Capital Fund of BIS, and Durham University.