Channel maps of the ¹²CO (2–1) line emission observed with the compact configuration of the SMA. Each box contains pairs of maps corresponding to the blue- and red-shifted emission at the same velocity offset from V_sys. The corresponding LSR velocities (km s^-1) are indicated in the top right corner of each box. Contours start from a 3σ level of 0.4 Jy beam^-1 for both wings and increase in steps of 2σ. In the bottom left panel, a linear scale and the synthesized beam are shown. The map of the 1.3 mm dust continuum (gray contours) is shown in overlay.