The halo occupation distribution of HI from 21-cm intensity mapping at moderate redshifts
J Stuart B Wyithe, Michael JI Brown
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | OXFORD UNIV PRESS | Published : 2010
The spatial clustering properties of H i galaxies can be studied using the formalism of the halo occupation distribution (HOD). The resulting parameter constraints describe properties like gas richness versus environment. Unfortunately, clustering studies based on individual H i galaxies will be restricted to the local Universe for the foreseeable future, even with the deepest H i surveys. Here, we discuss how clustering studies of the H i HOD could be extended to moderate redshift, through observations of fluctuations in the combined 21-cm intensity of unresolved galaxies. In particular, we make an analytic estimate for the clustering of H i in the HOD. Our joint goals are to estimate (i) t..View full abstract
The research was supported by the Australian Research Council (JSBW).