Impact Events as a Possible Mechanism to Initiate Sublimation–Dust Activity of Main-Belt Asteroidsстатья
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Дата последнего поиска статьи во внешних источниках: 31 июля 2024 г.
Аннотация:Sublimation–dust activity in some primitive-type asteroids of the Main asteroid belt (MAB) correlates with the near-perihelion position of asteroids in orbit. These results suggest that activity of this kind is induced by the sublimation (cometary) mechanism, i.e., release of dust particles from the surface of evaporating ice-bearing layers. It is considered that these layers become bared due to collisions between asteroids in the MAB. However, collisions may also directly result in ejecting the dust matter (the impact mechanism). Here, we consider the both mechanisms. The frequency and effectiveness of impacts have been quantitatively estimated.