Structure and kinematics of edge-on galaxy discs - II. Observations of the neutral hydrogen

Abstract

We present Australia Telescope Compact Array and Westerbork Synthesis Radio Telescope H I observations of 15 edge-on spiral galaxies of intermediate to late morphological type. The global properties and the distribution and kinematics of the H I gas are analysed and discussed. We determine the rotation curves using the envelope-tracing method. For 10 spiral galaxies with a stellar disc truncation we find an average ratio of the H I radius to the truncation radius of the stellar disc of 1.1 ± 0.2 (1σ).