Journal article
The HI mass function as a probe of photoionization feedback on low-mass galaxy formation
HS Kim, JSB Wyithe, C Power, J Park, CDP Lagos, CM Baugh
Monthly Notices of the Royal Astronomical Society | Published : 2015
Abstract
We explore the galaxy formation physics governing the low-mass end of the HI mass function in the local Universe. Specifically, we predict the effects on the HI mass function of varying (i) the strength of photoionization feedback and the redshift of the end of the epoch of reionization, (ii) the cosmology, (iii) the supernovae feedback prescription and (iv) the efficiency of star formation. We find that the shape of the low-mass end of the HI mass function is most affected by the critical halo mass below which galaxy formation is suppressed by photoionization heating of the intergalactic medium. We model the redshift dependence of this critical dark matter halo mass by requiring a match to ..
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Grants
Awarded by Australian Research Council
Funding Acknowledgements
H-SK is supported by a Discovery Early Career Researcher Awards from the Australian Research Council (DE140100940). CP thanks Simon Driver and Aaron Robotham for helpful discussions. CP is supported by DP130100117, DP140100198 and FT130100041. CL is funded by the ARC project DE150100618. This work was supported by a STFC rolling grant at Durham. The calculations for this paper were performed on the ICC Cosmology Machine, which is part of the DiRAC Facility jointly funded by the STFC, the Large Facilities Capital Fund of BIS, and Durham University. Part of the research presented in this paper was undertaken as part of the Survey Simulation Pipeline (SSimPL; http://www.astronomy.swin.edu.au/SSimPL/). The Centre for All-Sky Astrophysics is an Australian Research Council Centre of Excellence, funded by grant CE110001020.