Back to Volume
Paper: H I Velocity Dispersions in NGC 1058 and DDO 196
Volume: 240, Gas and Galaxy Evolution: A Conference in Honor of the 20th Anniversary of the VLA
Page: 288
Authors: Petric, A.; Rupen, M. P.
Abstract: We use high resolution, high sensitivity HI observations to trace the vertical motions of the neutral gas in the spiral galaxies NGC 1058 and DDO 196. In both systems the line widths vary widely across the disks with dispersions σv ranging from 5 to 12 km s-1. In NGC 1058 there is a general trend for σv to decline with radius, apart from a few areas of high σv which occur between the spiral arms. Throughout most of this galaxy the profiles have the same shape (when scaled by σv) but are not Gaussian. The most outstanding feature in DDO 196 is a region ~ 50'' across (5 kpc) where high dispersion gas with a high velocity gradient surrounds a low column density area.
Back to Volume