Distribution of centroid velocities and widths (dispersions) in the left and right panels, respectively for emission lines detected toward the A source (upper panels) and B source (lower panels). Gaussian fits to the distributions are over-plotted (V_LSR of 3.2 and 2.7 km s^-1 and ΔV of 2.6 and 1.9 for A and B respectively). The V_LSR and ΔV distributions for the two sources are significantly different according to a standard T test for distributions with unequal variances.