Journal article
Dark-ages reionization and galaxy formation simulation - IX. Economics of reionizing galaxies
AR Duffy, SJ Mutch, GB Poole, PM Geil, HS Kim, A Mesinger, J Stuart
Monthly Notices of the Royal Astronomical Society | OXFORD UNIV PRESS | Published : 2017
Abstract
Using a series of high-resolution hydrodynamical simulations we show that during the rapid growth of high-redshift (z > 5) galaxies, reserves of molecular gas are consumed over a time-scale of 300 Myr, almost independent of feedback scheme. We find that there exists no such simple relation for the total gas fractions of these galaxies, with little correlation between gas fractions and specific star formation rates. The bottleneck or limiting factor in the growth of early galaxies is in converting infalling gas to cold star-forming gas. Thus, we find that the majority of high-redshift dwarf galaxies are effectively in recession, with demand (of star formation) never rising to meet supply (of ..
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Awarded by Horizon 2020 Framework Programme
Funding Acknowledgements
ARD would like to thank Caitlin Casey, Katie Mack and Kristian Finlator for stimulating discussions, Claudio Dalla Vecchia for his SNe feedback models, as well as Chris Power and Doug Potter for their efforts with initial conditions. JSBW acknowledges the support of an Australian Research Council Laureate Fellowship. This work was supported by the Flagship Allocation Scheme of the NCI National Facility at the ANU, data storage at VicNodes, generous allocations of time through the iVEC Partner Share and Australian Supercomputer Time Allocation Committee. ARD gratefully acknowledges the use of computer facilities purchased through a UWA Research Development Award. We would like to thank the PYTHON developers of MATPLOTLIB (Hunter 2007), COSMOLOPY (http://roban.github.com/CosmoloPy) and PYNBODY (Pontzen et al. 2013) for easing the visualization and analysis efforts in this work.