Integrated moment-0 map of CN 2-1 J = 5/2−3/2 F = 7/2−5/2 line (blended with the F = 5/2−3/2 and F = 3/2−1/2 lines) overlaid with the dust continuum map a). The red line indicates the cut for the position-velocity (P − V) diagram. The P − V diagram of the CN line b). Both are observed with SMA. The contours in a) are −0.67, −1.34, −2.01, −2.68, −3.35, and −4.02 and in b) they are −0.97, −1.94, −2.91, −3.88, −4.86, and −5.83. The P − V diagram is cut at the position of the observed center and position angle of 0.