Fraction of surviving carbon (left panel) and silicate dust (right panel) over the entire Cas A remnant as a function of α. For each value of α the curve provides the fraction of remaining dust, which is given by the grains able to survive processing located in the outer layers down to α plus the unprocessed dust residing in the inner layers. The three curves show the effect of kinetic sputtering only and of kinetic+thermal, the latter evaluated for two temperatures of the smooth ejecta: T = 107 K and T = 108 K.
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