The Milky Way’s Δv range (red filled circles) from the analysis (Fig. 16) of antipodal sightlines plotted on the velocity width/metallicity relation of DLAs (Som et al. 2015). The parameter v90 denotes the velocity width in which 90 percent of the integrated optical depth is contained (Wolfe & Prochaska 1998). We here set v90 ≡ Δv.
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