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Fig. 2

image

Top panels: maps of the integrated temperature of the HCN and HCO+J = 1 → 0 lines in M17 SW. The peak emissions are ~169 K km s-1 and ~152 K km s-1, respectively. The contour levels for all panels in this figure are, from thin to thick, 10%, 25%, 50%, 75%, and 90% of the peak emission. Middle panels: maps of the integrated temperature of HCN and HCO+J = 3 → 2 lines, with peak emissions of ~133 K km s-1 and ~183 K km s-1, respectively. Bottom panels: maps of the integrated temperature of the HCN and HCO+J = 4 → 3 lines in M17 SW. The peak emissions are ~107 K km s-1 and ~187 K km s-1, respectively. The reference position (Δα = 0, Δδ = 0) is labeled with a cross, and other symbols are indicated as in Fig. 1. The integrated temperature scale is the same in all maps.

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