Smaug—Hydrodynamic Simulations of First Galaxy Formation

VicNode ID 2014R9.03

Alan Duffy, Swinburne University of Technology

Understanding the rapid growth of galaxies in the first billion yearsof the universe is a challenge due to the extreme faintness of these distant objects to observe. A new series of numerical hydrodynamic simulations, called Smaug, recreates a region of the universe and reruns the formation of the first galaxies by systematically varying galaxy astrophysics models (such as the energy available from exploding stars, supernova, that can reheat neighbouring gas). The simulations are created with an advanced non-public version of Gadget-3, with production runs amongst the highest resolution yet achieved for a volume of 10Mpc/h on a side (gas particles of an incredibly 100,000 solar masses each). Each snapshot (time output) of the simulation is saved as highly portable HDF5 file, and includes value added catalogues from SubFind (a galaxy / halo finder), Neutral Hydrogen / Molecular Hydrogen catalogues from Duffy et al. (2012c) and Dark Matter properties from Duffy et al. (2008a). These simulations are crucial for supporting Australian Square Pathfinder observations (in particular the Murchison Widefield Array). In addition, older volumes run to the present day from the international OWLS simulation series are capable of predicting the structures we see around us, and have been used to aid the Australian Square Kilometre Array Pathfinder telescope.

Alan Duffy at Swinburne University of Technology was awarded 70 TB of storage for this collection under the RDSI ReDS Scheme—with 70 TB Vault storage.