Total He ENA intensities (integrated over energy range 0.2–50 keV and with losses included) as a function of angle θ from the apex for the hydrodynamic, Parker, and ad hoc models, and two variants of α-particle injection at the TS: “170 km s^-1” – left panel and “320 km s^-1” – right panel (Sect. 2.5). He⁺ injection is as described in Sect. 2.5.