Abstract
21-cm neutral hydrogen observations, made using the 64-m Parkes radio telescope, are presented for 48 galaxies, 39 of which are clear detections. The H I properties and homogeneous optical data, including new photometry, are tabulated for the galaxies. A high signal-to-noise ratio subset of these observations is used to demonstrate that the overall flux-density scale is within a few per cent of northern (Jodrell Bank and Green Bank) scales. The remainder are used elsewhere in a new determination of the Local Group peculiar velocity. H I–optical diameter correlations are shown to be a useful discriminant between competing diameter systems and indicate that the Lauberts ESO(B) catalogue is the most useful currently available source of southern galaxy diameters.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
