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Table 1

Original spatial resolution in parsecs for all (ALMA as well as PdBI) molecular transitions used in this paper.

Transition Spatial resolution Average spatial resolution (pc) Instrument

CO (1–0) 2″ × 1.1″ (140 pc × 77 pc) 109 PdB1
CO (2–1) 2″ × 1.1″ (140 pc × 77 pc) 109 PdB1
CO (3–2) 0.6″ × 0.5″ (42 pc × 35 pc) 39 ALMA Band 7
CO (6–5) 0.4″ × 0.2″ (28 pc × 14 pc) 21 ALMA Band 9
HCO+ (1–0) high-res. 2″ × 0.8″ (140 pc × 56 pc) 98 PdBI2
HCO+ (1–0) low-res. 6.6″ × 5.1″ (460 pc × 350 pc) 405 PdBI2
HCO+ (4–3) 0.6″ × 0.5″ (42 pc × 35 pc) 39 ALMA Band 7
HCN(1–0) high-res. 2″ × 0.8″ (140 pc × 56 pc) 98 PdBI2
HCN(1–0) low-res. 6.6″ × 5.1″ (460 pc × 350 pc) 405 PdBI2
HCN (4–3) 0.6″ × 0.5″ (42 pc × 35 pc) 39 ALMA Band 7
CS (2–1) 6.6″ × 3.2″ (462 pc × 224 pc) 343 PdBI3
CS (7–6) 0.6″ × 0.5″ (42 pc × 35 pc) 39 ALMA Band 7

Notes. We assume a distance of 14 Mpc. .

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