Fig. 10
2D histograms of the CNM molecular gas fractions 
depending on E(B−V). Selection criteria are for top left: NHI ≤ 4 1020 cm−2 and E(B−V) ≤ 0.08 mag, top right: all-sky but CO regions masked, bottom left: all-sky, bottom right: CO–bright regions only. The color coding represents pixel counts.
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