Planck early results
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Details of the dust temperature (left column), dust optical depth at 857 GHz (central column) and dark gas column density (right column) for the Chamaeleon (first line), Aquila-Ophiuchus flare (second line), Polaris flare (third line) and Taurus (fourth line). The temperature and optical depth maps are shown in log scale with a colour scale ranging from 15K (black) to 20K (red) and 1 × 10-5 (black) to 3 × 10-3 (red) respectively. The dark gas column density derived from the optical depth at 857 GHz (see Sect.4) and is shown in linear scale with a colour scale ranging from –3 (black) to 7 × 1021Hcm-2 (red). The contours show the 12CO(J = 1 → 0) integrated intensity at 2, 10 and 20K km s-1. The double line shows the limit of the CO surveys.

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