Journal article
Dark-ages Reionization and Galaxy formation simulation - I: The dynamical lives of high-redshift galaxies
GB Poole, PW Angel, SJ Mutch, C Power, AR Duffy, PM Geil, A Mesinger, SB Wyithe
Monthly Notices of the Royal Astronomical Society | OXFORD UNIV PRESS | Published : 2016
DOI: 10.1093/mnras/stw674
Abstract
We present the Dark-ages Reionization and Galaxy formation Observables from Numerical Simulations (DRAGONS) programme and Tiamat, the collisionless N-body simulation programme upon which DRAGONS is built. The primary trait distinguishing Tiamat from other large simulation programme is its density of outputs at high redshift (100 from z = 35 to z = 5; roughly one every 10 Myr) enabling the construction of very accurate merger trees at an epoch when galaxy formation is rapid and mergers extremely frequent. We find that the friends-of-friends halo mass function agrees well with the prediction of Watson et al. at high masses, but deviates at low masses, perhaps due to our use of a different halo..
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Awarded by Horizon 2020 Framework Programme
Funding Acknowledgements
This research was supported by the Victorian Life Sciences Computation Initiative (VLSCI), grant ref. UOM0005, on its Peak Computing Facility hosted at the University of Melbourne, an initiative of the Victorian Government, Australia. Part of this work was performed on the gSTAR national facility at Swinburne University of Technology. gSTAR is funded by Swinburne and the Australian Governments Education Investment Fund. This research programme is funded by the Australian Research Council through the ARC Laureate Fellowship FL110100072 awarded to JSBW. CP acknowledges support of ARC DP130100117 and DP140100198, and ARC Future Fellowship FT130100041. AM acknowledges support from the European Research Council (ERC) under the European Unions Horizon 2020 research and innovation programme (grant agreement no. 638809 AIDA). We thank Volker Springel for making his GADGET-2 and SUBFIND codes available to us and Peter Behroozi for making his ROCKSTAR code available. We also thank N. Gnedin for several very useful comments on our manuscript.