Fig. 1

N(H2) map of IRDC G11.11-0.12, derived using NIR and MIR dust extinction data. The spatial resolution of the map is 2″ and it covers the dynamic range of NH2 = 2−95 × 1021 cm-2. The contour levels are [3,10,15,25,...] × 1021 cm-2. The contour at 10 × 1021 cm-2 is bold. The coordinate system is tilted: the Galactic longitude is on y-axis and latitude on x-axis.
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