Journal article
On the role of feedback in shaping the cosmic abundance and clustering of neutral atomic hydrogen in galaxies
HS Kim, C Power, CM Baugh, JSB Wyithe, CG Lacey, CDP Lagos, CS Frenk
Monthly Notices of the Royal Astronomical Society | Published : 2013
DOI: 10.1093/mnras/sts279
Abstract
We investigate the impact of feedback - from supernovae (SNe), active galactic nuclei (AGN) and a photoionizing background at high redshifts - on the neutral atomic hydrogen (H I) mass function, the bJ-band luminosity function, and the spatial clustering of these galaxies at z = 0. We use a version of the semi-analytical galaxy formation model GALFORM that calculates self-consistently the amount of HI in a galaxy as a function of cosmic time and links its star formation rate to its mass of molecular hydrogen (H2). We find that a systematic increase or decrease in the strength of SN feedback leads to a systematic decrease or increase in the amplitudes of the luminosity and HI mass functions, ..
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Awarded by European Commission
Funding Acknowledgements
H-SK is supported by a Super-Science Fellowship from the Australian Research Council. CP thanks warmly Danail Obreschkow, Martin Meyer and Aaron Robotham for helpful discussions. 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 CE11E0090.