Account of charge in destructive processes of interstellar dust
The results of investigation of the influence of electric charge on the efficiency of most important destructive processes occurring with dust in the interstellar medium are presented. Considered processes are photo-destruction by ultraviolet radiation field, sputtering by high energy ions and electrons and fragmentation as a result of collisions of dust grains between each other. Based on the calculations it is concluded that the charge plays a major role in photodestruction process. The charged dust destruction is several times more efficient than destruction of neutral grains. Other effects which arise for charged dust and influence the rates of its destruction are also discussed.