Column density PDFs of the 4 sub-regions in NGC 6334 produced without the 70 μm band. The x-axis labelling is in visual extinction at the bottom x-axis and in ln (N/ ⟨ N ⟩ ) at the top x-axis. The labelling of the y-axis is a probability. The green curves indicate the best lognormal fit PDF (Eq. (1)), and the red line is a fit to the high-density part of the PDF that follows a power law. The width of the PDF, σ, and the exponent of the spherical density profile, α, are given in each panel.
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