2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/113341We study the influence of X-ray radiation on the wind parameters of O stars. For this purpose we use our own NLTE wind code. The X-ray emission (assumed to be generated in wind shocks) is treated as an input quantity. We study its influence on the mass-loss rate, terminal velocity and ionization state of the stellar wind of Galactic O stars.2 pages; to appear in the proceedings of workshop "Mass loss from stars and the evolution of stellar clusters", A. de Koter, L. Smith & R. Waters, edsAstrophysicstext