Mass-loss and multicomponent flow from central stars of planetary nebulae

Since the acceleration of different wind species may be different, their wind velocities may differ and so hot star winds have a multicomponent nature. For high density winds (e.g. of galactic O stars) this multicomponent nature does not influence the wind structure, however for low density winds multicomponent effects occur, for example frictional heating, decoupling of wind components, etc. (see Krtička & Kubát 2001). To estimate the importance of multicomponent effects for the winds of central stars of planetary nebulae we calculate multicomponent wind models for these stars.