Upperpanels: PV-diagrams in the right ascension direction as seen in the CO(2–1; colour), SiO(5–4; black contours), and p-H₂S(2₂₀ − 2₁₁; red contours) lines at declination offsets of 2.′′5 S (left panel), mid plane (middle panel), and 2.′′5 N (right panel). Lower panels: the same in the declination direction at right ascension offsets of 2.′′ 5 E (top panel), mid plane (middle panel), and 2.′′5 W (bottom panel). The flux scale is in mJy beam⁻¹, and the contours start at 2 mJy beam⁻¹ with a spacing of 2 mJy beam⁻¹.