Fig. 10

Absorption spectra in the OH ground-state transitions against a continuum background source (l = 30.720°,b = −0.083°). It is unresolved but Galactic, because it is classified as a UCHii region in the CORNISH catalog G030.7197-00.0829. The spectra are extracted at the continuum peak position with a velocity resolution of 1.5 km s-1.
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