Open Access
Fig. A.1
NH3 deuteration as a function of NH3 (1,1) line width and rotational temperature between the (1,1) and (2,2) inversion transition. ATLASGAL clumps that are 70 μm weak are illustrated as black points, MIR-weak sources as red points, MIR-bright clumps as green triangles, and compact HII regions as blue triangles.
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