Column density map of Musca (color scale), derived using NIR dust extinction mapping and data from NEWFIRM and 2MASS. The spatial resolution of the map is FWHM = 45″ and the sensitivity σ(NH) ≈ 0.4 × 1021 cm-2. The white boxes indicate three regions, which are shown in blowups in Fig. 3. The contours show the 870 μm continuum emission contours, observed with the APEX/LABOCA instrument and smoothed down to the resolution of the extinction data. The contours are drawn at the intervals of 0.03 mJy/beam, which is the 3σ rms noise of the smoothed data.
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