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Fig. 3

image

Intensity profiles of the Mg ii h&k lines at μZ = 0.953 computed on fully-winged (solid) or truncated (dots) frequency grids in CRD (red) or PRD (blue). Left: wide wavelength range showing both the k 279.6 nm and the h 280.3 nm lines. Dashed vertical lines show the wavelength range for the right panel. Right: close-up of the k line core. The model atmosphere is 1D Bifrost.

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