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Fig. 4
Intrinsic Mg ii stellar absorption line profile of HD 209458 as observed with HST/STIS at 2796.3518 Å (Mg ii-k line) and 2803.5305 Å (Mg ii-h line). Velocities are relative to the Mg ii-k line. Similarly to the Mg i line, the Mg ii lines spectral region is V-shaped.
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