Synthetic line profiles computed for the three hydrodynamic wind regimes using the T19 model: the fast solution (δ = 0, top row), transition solution (δ = 0.26, middle row), and δ-slow solution (δ = 0.35, bottom row). The first column indicates the hydrodynamic solution obtained with ZEUS-3D, followed by the synthetic profiles for Si IV (second column), He I 5876 Å (third column), Hα (fourth column), and the He I + Brα blend around 4.05 µm (fifth column). The fast solution corresponds to Ṁ = 1.06 × 10⁻⁶ M_⊙ yr⁻¹ and v_∞ = 720 km s⁻¹; the solution in the transition region to Ṁ = 1.67 × 10⁻⁶ M_⊙ yr⁻¹ and v_∞ = 322 km s⁻¹; and the δ-slow solution to Ṁ = 2.35 × 10⁻⁶ M_⊙ yr⁻¹ and v_∞ = 253 km s⁻¹.