Radiative He +(1s) + He(1s 2) Processes as the Source of the DB White Dwarf Atmosphere Electromagnetic Continuous Spectra

The influence of the processes of radiative charge transfer and photo-association during He⁺ + He collisional processes, as well as the process of the photodissociation of the He⁺₂ molecular ion, on the formation of the continuous spectrum of the DB white dwarf atmospheres with T_eff = 12,000-30,000 K, for log g (gravity) = 7 and 8, is studied within the wavelength range λ = 200-800 nm. It is shown that the contribution of these processes relative to other relevant radiative processes is particularly important for T_eff ≤ 16,000 K and increases with the decrease of T_eff. Moreover, it is found that the influence of the considered He+ + He radiative processes is particularly pronounced in the UV range.