Fig. B.2
Left: dust thermal emission in the PolarisFlare observed with Herschel-SPIRE-LW at 500 μm (Miville-Deschênes et al. 2010). The initial observation has been reshaped and the orientation of the axes is arbitrary. Right: k-means clustering of the Herschel map in WST space, with k = 4. A cluster (green, red, blue, yellow colours) gathers regions of the map that have similar WST coefficients.
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