Fig. A.1
Integrated intensity maps of HCN 3−2, HCO+ 3−2, HCN 4−3, and HCO+ 4−3 in 200 km s-1 bins from –600 to 600 km s-1 around the systemic velocity (see Sect. 3.2). The single dot-dashed contour represents 3σ (1σ = 0.15 mJy km s-1 beam-1) and aims to guide the eye toward the most extended emission. Continuum emission peaks are indicated by gray crosses.
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