Intensity weighted velocity (moment 1) map and integrated intensity contours of HCN taken over the velocity ranges 0−100, 100−200, and 200−300 km s⁻¹ from the systemic velocity (∼3080 km s⁻¹) on the red- (solid) and blueshifted (dashed) sides in ESO 320-G030. Velocity contours are given every 30 km s⁻¹. Integrated intensity contours start at 0.24, 0.16, and 0.11 Jy beam⁻¹ km s⁻¹ (5σ) for the three velocity intervals, respectively, and increase by factors of 2.