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During the evolution of rotating first stars, which initially consisted ofonly hydrogen and helium, CNO elements may emerge to their surface. These starsmay therefore have winds that are driven only by CNO elements. We study weakwind effects (Gayley-Owocki heating and multicomponent effects) in stellarwinds of first generation stars driven purely by CNO elements. We apply ourNLTE multicomponent models and hydrodynamical simulations. The multicomponenteffects (frictional heating and decoupling) are important particularly for lowmetallicity winds, but they influence mass loss rate only if they causedecoupling for velocities lower than the escape velocity. The multicomponenteffects also modify the feedback from first stars. As a result of thedecoupling of radiatively accelerated metals from hydrogen and helium, thefirst low-energy cosmic ray particles are generated. We study the interactionof these particles with the interstellar medium concluding that these particleseasily penetrate the interstellar medium of a given minihalo. We discuss thecharging of the first stars by means of their winds. Gayley-Owocki heating,frictional heating, and the decoupling of wind components occur in the winds ofevolved low-metallicity stars and the solar metallicity main-sequence stars.

Weak wind effects in CNO driven winds of hot first stars