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Fig. 4


Extinction maps of Galactic molecular clouds (left) and corresponding Δ-variance (right). See Fig. 3 for further explanations. The red curves for NGC 2264 and Orion B represent 13CO 1 → 0 data from Bell Labs (see Table 1 and Bench et al. 2001). The green curve shows the spectrum for Orion A using 13CO 1 → 0 data from Bell Labs. The red curve for Rosette stems from 13CO 1 → 0 data from FCRAO (Heyer et al. 2006).

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