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Fig. 10.
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Strong Mg IIλ2796 absorption line densities for systems with Wr > 1 Å. The JWST data are compared with the strong Mg II line densities in a large quasar sample (Chen et al. 2017) and with the XQ-100 survey (Christensen et al. 2017), and are consistent with a decrease in the line densities to the highest redshifts.
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