Abstract
Highly perturbed magnetic field exist in quasars which will produce a large Alfven wave flux. We investigate here the effect of Alfven wave heating on the radiative heating-cooling function of broad-line emitting clouds in quasars with respect to the thermal instability. Jatenco-Pereira & Opher investigated resonance surface damping of Alfven waves in the atmospheres of young and old stars and the Sun, and we study here resonance surface damping of Alfven waves in the region of broad-line emitting clouds in quasars. The radiative heating-cooling function used depends on (1) heating and cooling associated with recombination (H REC ); (2) radiative losses due to electron excitation of resonance transitions in metal ions (H MI ); (3) thermal bremsstrahlung (H BREM ); (4) Compton heating-cooling (H COM ); and (5) Alfven wave heating (H SW )
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