Journal article

An efficient hybrid method to produce high-resolution large-volume dark matter simulations for semi-analytic models of reionization

Yisheng Qiu, Simon J Mutch, Pascal J Elahi, Rhys JJ Poulton, Chris Power, J Stuart B Wyithe

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | OXFORD UNIV PRESS | Published : 2021

Abstract

Resolving faint galaxies in large volumes is critical for accurate cosmic reionization simulations. While less demanding than hydrodynamical simulations, semi-analytic reionization models still require very large N-body simulations in order to resolve the atomic cooling limit across the whole reionization history within box sizes ≳100 h−1 Mpc. To facilitate this, we extend the mass resolution of N-body simulations using a Monte Carlo algorithm. We also propose a method to evolve positions of Monte Carlo haloes, which can be an input for semi-analytic reionization models. To illustrate, we present an extended halo catalogue that reaches a mass resolution of Mhalo = 3.2 × 107 h−1 M☉ in a 105 h..

View full abstract

University of Melbourne Researchers

Grants

Awarded by Australian Research Council Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D)


Funding Acknowledgements

We thank the anonymous referee for providing a detailed report to improve the quality of the paper. 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 was performed on 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). YQ thanks Yuxiang Qin and Bradley Greig for useful discussions.