This article has an erratum: [https://doi.org/10.1051/0004-6361/201834752e]
Comparison of R = f∕i line ratios when the line forms beyond radius r0. The quantity (long dash), 1.1 (short dash), 1.5 (dotted), and 2.0 (solid), where δṀ∕Ṁ0 = 0.3. The quantity R is normalized to , which is the value for the line ratio when δṀ = 0 for the respective cases. Thus, the curves represent relative changes to a nonvarying wind, indicated as the horizontal line in magenta.
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