Fig. 3
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Illustration of some classical von Zeipel (full lines) and Espinosa-Lara models (dashed lines) for He I 4471 + Mg II 4481, He I 4388, He I 4922, and He I 6678 Å. All models are built assuming a PNRC temperature of Τ = 15 000 Κ, M = 4.4 Μ⊙, R = 6.17 R⊙, and i = 35°, and showing the rotation rate ω = Ω/Ωc for three values, ω = 0.687, 0.879, and 0.985.
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