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Fig. 12


Comparison between timescales relevant for the processing of carbon (left panel) and silicate (right panel) dust grains in an ejecta cloud: cloud destruction time tdest, cloud evaporation time tsat, calculated for two temperatures of the gas surrounding the clouds, and dust escape time tesc, calculated for two grain sizes. Both tesc and tdest has been calculated assuming vgr(0) = vcloud = 160 km s-1. All timescales are represented as a function of the diameter of the clump. The vertical line indicates the diameter adopted for the ejecta clouds in Cas A. See text for details.

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