Journal article
Computationally efficient reionization in a large hydrodynamic galaxy formation simulation
JE Davies, S Bird, S Mutch, Y Ni, Y Feng, R Croft, TD Matteo, JSB Wyithe
Monthly Notices of the Royal Astronomical Society | Published : 2023
Abstract
Accuracy in the topology and statistics of a simulated epoch of reionization (EoR) are vital to draw connections between observations and physical processes. While full radiative transfer models produce the most accurate reionization models, they are highly computationally expensive, and are infeasible for the largest cosmological simulations. Instead, large simulations often include EoR models that are pre-computed via the initial density field, or post-processed where feedback effects are ignored. We introduce astrid-es, a resimulation of the astrid epoch of reionization 20 > z > 5.5 which includes an on-the-fly excursion-set reionization algorithm. astrid-es produces more accurate reioniz..
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Grants
Awarded by Swinburne University of Technology
Funding Acknowledgements
JD acknowledges support from the Italian Ministry for Universities and Research (MUR) through the PRO3 project 'Data Science methods for Multi-Messenger Astrophysics & Multi-Survey Cosmology'. This research was supported by the Australian Research Council Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D), through project number CE170100013. This work utilized the OzSTAR national facility at Swinburne University of Technology. OzSTAR is funded by Swinburne University of Technology and the National Collaborative Research Infrastructure Strategy (NCRIS). SB acknowledges funding support from NASA80NSSC21K1840. The authors acknowledge the Frontera computing project at the Texas Advanced Computing Center (TACC) for providing HPC and storage resources that have contributed to the research results reported within this paper. Frontera is made possible by National Science Foundation award OAC-1818253. URL: http://www.tacc.utexas.edu