Fig. 5
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Theoretical methanol E/A ratios (black solid line) compared to those observed in Barnard 1b (blue dots, left panel) and IC 348 (red dots, right panel). The blue and red crosses indicate that the E/A ratio used to estimate the total methanol column density is set to be equal to the theoretical value. The horizontal dashed line corresponds to the statistical 1:1 ratio.
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