C¹⁷O J = 2−1 moment maps. Top panel: C¹⁷O J = 2−1 moment 0 map integrated between −66 and −61 km s⁻¹. The colour scale goes from 0.01 to 0.50 Jy beam⁻¹. The black contours represent the continuum emission at 340 GHz with levels at 1, 10, 30, 60, 90, and 140 mJy beam⁻¹. The beams of the C¹⁷O J = 2−1 line and the 340 GHz continuum emission are indicated in the bottom right corner. Bottom panel: C¹⁷O J = 2−1 moment 1 map. The units of the colour bar are km s⁻¹. The black contours represent the radio continuum at 340 GHz with levels at 1, 10, 30, 60, 90, and 140 mJy beam⁻¹. The systemic velocity is about −64 km s⁻¹.