Results from fitting the distant (top) and close (bottom) components of the line profile to a Gaussian. For each of the two panels: height of the ¹²CO J = 1− 0 line in K (top, left), height of the ¹²CO J = 2− 1 line in K (top, middle), full-width at half maximum of the ¹²CO J = 1− 0 line in km s⁻¹ (bottom, middle), full-width at half maximum of the ¹²CO J = 2− 1 line km s⁻¹ (bottom, right), and best-fit central velocity in km s⁻¹ (bottom, left). For regions with signal over 5σ, the ratio of ¹²CO J = 2− 1 to ¹²CO J = 1− 0 is plotted inthe top, right. Overlaid are the radio contours at 1420 MHz in units of brightness temperature at 4.8, 5.0, 5.5, and 6.0 K. Note the velocity gradient from the south to the north-west in the best-fit central velocity of the close component plot (lower left corner). The line used to make the position-velocity plot in Fig. 7 is indicated in this map in dark blue.