MIGHTEE-HI fluxes of COSMOS/XMM-LSS sources

This is the first HIMF measured using interferometric data over non-group or cluster field, i.e. a deep blank field. We constrain the parameters of the Schechter function that describes the HIMF with two different methods: 1/V_max_ and modified maximum likelihood (MML).

We find a low-mass slope {alpha}=-1.29^+0.37^_-0.26_ , 'knee' mass log_10_ (M_*_ / M_{sun}_) = 10.07^+0.24^_-0.24_ and normalization log_10_ ({phi}_*_ / Mpc^-3^) = -2.34^+0.32^_-0.36_ (H_0_ = 67.4 km/s/Mpc) for 1/V_max_ , and {alpha} = -1.44^+0.13^_-0.10_ , 'knee' mass log_10_ (M_*_ / M_{sun}_) = 10.22^+0.10^_-0.13_ and normalization log_10_ ({phi}_*_ / Mpc^-3^) = -2.52^+0.19^_-0.14_ for MML. When using 1/V_max_ we find both the low-mass slope and 'knee' mass to be consistent within 1{sigma} with previous studies based on single-dish surveys.