Kim, Han-Seek and Baugh, C. M. and Benson, A. J. and Cole, S. and Frenk, C. S. and Lacey, C. G. and Power, C. and Schneider, M. (2011) The spatial distribution of cold gas in hierarchical galaxy formation models. Monthly Notices of the Royal Astronomical Society, 414 (3). pp. 2367-2385. ISSN 0035-8711 http://resolver.caltech.edu/CaltechAUTHORS:20110815-105156244
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The distribution of cold gas in dark matter haloes is driven by key processes in galaxy formation: gas cooling, galaxy mergers, star formation and reheating of gas by supernovae. We compare the predictions of four different galaxy formation models for the spatial distribution of cold gas. We find that satellite galaxies make little contribution to the abundance or clustering strength of cold gas selected samples, and are far less important than they are in optically selected samples. The halo occupation distribution function of present-day central galaxies with cold gas mass >10^9 h^(−1) M_⊙ is peaked around a halo mass of ≈10^(11) h^(−1) M_⊙, a scale that is set by the AGN suppression of gas cooling. The model predictions for the projected correlation function are in good agreement with measurements from the H i Parkes All-Sky Survey. We compare the effective volume of possible surveys with the Square Kilometre Array with those expected for a redshift survey in the near-infrared. Future redshift surveys using neutral hydrogen emission will make possible measurements of the baryonic acoustic oscillations that are competitive with the most ambitious spectroscopic surveys planned in the near-infrared.
|Additional Information:||© 2011 The Authors. Monthly Notices of the Royal Astronomical Society © 2011 RAS. Accepted 2011 February 17. Received 2011 February 16; in original form 2010 March 1. Article first published online: 3 May 2011. We acknowledge a very helpful report from the referee and useful comments from Barbara Catinella and private communications from Filipe Abdalla. H-SK acknowledges support from the Korean Government’s Overseas Scholarship. CSF acknowledges a Royal Society Wolfson Research Merit Award. This work was supported in part by grants from the Science and Technology Facilities Council at Durham and Leicester (CP).|
|Subject Keywords:||galaxies: evolution; galaxies: formation; galaxies: luminosity function, mass function; large-scale structure of Universe|
|Official Citation:||The spatial distribution of cold gas in hierarchical galaxy formation models (pages 2367–2385) Han-Seek Kim, C. M. Baugh, A. J. Benson, S. Cole, C. S. Frenk, C. G. Lacey, C. Power and M. Schneider Article first published online: 3 MAY 2011 | DOI: 10.1111/j.1365-2966.2011.18556.x|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Ruth Sustaita|
|Deposited On:||15 Aug 2011 18:18|
|Last Modified:||15 Aug 2011 18:19|
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