Fig. 1
GMF20.0-17.9 overview. Top panel: Spitzer GLIMPSE 8 μm image of GMF20.0-17.9 (Churchwell et al. 2009). The color scale is chosen to bring IRDC features to prominence. Bottom panel: H I integrated emission for a small velocity interval from 44.5–47.5 km s−1. The yellow and black contours show the integrated 13CO emission from 42 to 57 km s−1 at the levels of 10.5 and 15 K km s−1, respectively.The yellow circles in the bottom panel mark the regions of the spectra shown in Fig. 4.
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