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Fig. 7
Predicted normalised (at ± 5900 km s-1) Lyα line profiles for an expanding shell with τa = 3 km s-1, b = 40 km s-1, log NHI = 20.2 cm-2, and varying shell velocity vexp = 0 (black), 20 (blue dotted), 50 (red dashed), 100 (green dashed), 200 (blue solid), 300 (red solid), 600 (magenta) km s-1.
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