Left panel: moment zero of the ¹³CO(2–1) emission line integrated from 3.4 km s⁻¹ to 11.1 km s⁻¹. The contours start at 3σ with 3σ steps with σ = 5.55 mJy beam⁻¹ km s⁻¹. The contour in grey represents the level at 50σ of the continuum emission (see Fig. 1). Right panel: first moment map of the ¹³CO(2–1) emission line. The beam is shown in the bottom left corner and N–E orientation as indicated in the top right corner.