Atmosphere structure (left) and the spectrum of escaping radiation (right) for a power-law distribution of bombarding particles with δ = 2 and γ_min = 10 for different NS effective temperatures: T_eff, h = 2 (green solid curves), 3 (black), 4 (blue), and 5 MK (red). Other NS atmosphere parameters are given in Table 1. The dashed curves correspond to the temperature structure and escaping spectrum of the atmosphere without external heating (for T_eff, i = 2, 3, 4, and 5 MK).