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Rigorous statistical numerical analysis of the response of a nonsphericaldust particle ensemble composed of aggregates of astronomical silicate ispresented. It is found that the rotational disruption mechanism is not onlylikely to occur but to be a key element in explaining many separateobservations of cometary dust. Namely, radiative torques are shown to spin-upand align cometary dust within the timescales of cometary activity.Additionally, the radiative torque alignment and disruption mechanisms withincertain conditions are shown to be consistent with observations of rapidpolarization of dust and spectral bluing of dust. The results indicate thatradiative torques should be taken into account nearly universally whenconsidering the evolution of cometary dust.

Rotational Disruption of Nonspherical Cometary Dust Particles by Radiative Torques