Model of the ionization structure of the hot components in symbiotic binaries during active phases (Sect. 2, Eq. (13)) as seen on a cut perpendicular to the orbital (x,y) plane containing the WD, which spins along the z-axis. The neutral zone has the form of a flared disk. It is optically thick to the distance R_d, i.e. the radius of the warm pseudophotosphere. The ionized zone has the opening angle θ(H ii). The model corresponds to  R_⊙ (see Eq. (19)). The inplot figures the central WD as a black circle with the radius R_WD, which is the source of the optically thick wind. The wind becomes optically thin at the distance R_⋆ (the shadow circle), which simulates the WD’s pseudophotosphere, the source of ionizing photons.