Two-phase broad-line regions in the presence of Alfven wave heating: The role of nonlinear and turbulent heating

We consider the heating caused by the damping of Alfven waves (nonlinear and turbulent) on thermal stability of a two-phase medium at broad-line cloud pressures of quasars. In particular, we investigate the distinct density dependencies of each heating mechanism in the heat-loss function. The heat-loss function contains the following physical processes: recombination, electron excitation of resonance transitions, bremsstrahlung, Compton interactions, and damping of Alfven waves. We compare the efficiencies of the Alfvenic heatings: nonlinear, resonance surface, and turbulent.