Fig. 1
E(B−V)∕NHI in regions used for the determination of the dust-to-gas ratio. Masked regions, including the Magellanic Clouds, are shown in blue. Top: E(B−V)∕NHI defined for canonical thin H I gas with NHI ≤ 4 × 1020 cm−2 and E(B−V) ≤ 0.08 mag (Lenz et al. 2017). Bottom: E(B−V)∕NHI outside CO–bright regions. Units are 10−27 cm2, scaling and color-coding are as in Fig. 4 for the mean corrected E(B− V)∕NH dust-to-gas ratio within a 2σ range.
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