Fig. 3
Fit to metal lines. The origin of the velocity scale is set at the redshift of the CO absorption (z = 2.68957). The positions of the three H2 components are indicated by short tick marks. The absorption seen at v = + 55 kms-1 in the Zn iiλ2026 panel (in blue) is due to Mg iλ2026 while that at v = − 110 kms-1 on the Si iiλ1808 panel is due to S iλ1807. Note that both S ii lines are affected by blends. Finally Si iiλ1304 reveals the presence of additional weak components that are not fitted (see text).
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