Modeling of Dust Evolution in the Interstellar Medium

We study the origin and evolution of interstellar dust in the Milky Way using multicomponent dust model that considers for the first time the individual evolutions of stardust and of dust condensed in molecular clouds of the Galactic disk We include dust production by AGB stars in detail, using the results of synthetic AGB models combined with models of dust condensation in stellar outflows, and estimate the efficiency of dust condensation in supernovae by matching model results for the Solar neighbourhood with observed abundances of presolar dust grains of supernova origin Our results indicate that supernovae produce mainly carbon dust, with only small amounts of silicates, iron and silicon carbonate We show that the interstellar dust population is dominated by dust grown in the interstellar medium across the Galactic history, moreover, dust formed in AGB stars and supernovae is a dominant source of dust only at metallicities lower than the minimal value for efficient dust growth in molecular clouds