Constraining the CO intensity mapping power spectrum at intermediate redshifts

Abstract

We compile available constraints on the carbon monoxide (CO) 1-0 luminosity\nfunctions and abundances at redshifts 0-3. This is used to develop a data\ndriven halo model for the evolution of the CO galaxy abundances and clustering\nacross intermediate redshifts. It is found that the recent constraints from the\nCO Power Spectrum Survey ($z \\sim 3$; Keating et al. 2016), when combined with\nexisting observations of local galaxies ($z \\sim 0$; Keres et al. 2003), lead\nto predictions which are consistent with the results of smaller surveys at\nintermediate redshifts ($z \\sim 1-2$). We provide convenient fitting forms for\nthe evolution of the CO luminosity - halo mass relation, and estimates of the\nmean and uncertainties in the CO power spectrum in the context of future\nintensity mapping experiments.\n