Journal article
Thermal and reionization history within a large-volume semi-analytic galaxy formation simulation
S Balu, B Greig, Y Qiu, C Power, Y Qin, S Mutch, JBS Wyithe
Monthly Notices of the Royal Astronomical Society | OXFORD UNIV PRESS | Published : 2023
Abstract
We predict the 21-cm global signal and power spectra during the Epoch of Reionization using the MERAXES semi-analytic galaxy formation and reionization model, updated to include X-ray heating and thermal evolution of the intergalactic medium. Studying the formation and evolution of galaxies together with the reionization of cosmic hydrogen using semi-analytic models (such as MERAXES) requires N-body simulations within large volumes and high-mass resolutions. For this, we use a simulation of sidelength 210 h−1 Mpc with 43203 particles resolving dark matter haloes to masses of 5 × 108 h−1 M☉. To reach the mass resolution of atomically cooled galaxies, thought to be the dominant population cont..
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Awarded by National Computational Infrastructure
Funding Acknowledgements
We thank the referee for their detailed comments which improved the quality of this manuscript. This research was supported by the Australian Research Council Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D), through project #CE170100013. Part of this work was performed on the OzSTAR national facility at the Swinburne University of Technology. The OzSTAR program partially receives funding from the Astronomy National Collaborative Research Infrastructure Strategy (NCRIS) allocation provided by the Australian Government. This research was also undertaken with the assistance of resources from the National Computational Infrastructure (NCI Australia), an NCRIS-enabled capability supported by the Australian Government. YQ acknowledges ASTAC Large Programs and the Research Computing Services NCI Access scheme at The University of Melbourne for some NCI computing resources.