Fig. 4.
Stellar masses of spectroscopically confirmed absorbing galaxies as a function of the absorber neutral hydrogen column density, colour-coded by the absorption metallicity. The dotted line marks the traditional distinction between sub-DLAs and DLAs at log10[NH I (cm−2)] = 20.3. The object encircled in red represents the outlier from Q 1209+107 PA2.
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