Extended Data Fig. 1: Line profiles of Zn ii λ2026 (black), Cr ii λ2056 (blue) and Fe ii λ2260 (green) in our sample.
From: Large metallicity variations in the Galactic interstellar medium

The Mg i λ2026 line is separated by ~50 km s−1 from Zn ii. Vertical lines mark the zero-velocity central wavelength of the Zn ii line. The yellow curve shows the 1σ uncertainties.