Fig. 4
Comparison between H2 masses derived with different methods. The H-luminosity-dependent estimate (Boselli et al. 2002) is plotted against the values obtained with a Milky Way standard conversion factor (left) and a metallicity-dependent X factor (Wolfire et al. 2010, right panel). As a comparison we also show galaxies from the HRS survey (red squares). The dotted lines indicate the one-to-one relation.
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