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Fig. 9


SiO(21) optical depth reached in each of the shock models, shown against the shock velocity, and calculated over the nH = 104 cm-3 fragment of our grid (colored symbols). The left and right panels correspond to the SiG (square symbols) and SiM (circle symbols) scenarios (see text). The color code is indicated in the panels, where the G0 (=0 or 1) value and fraction of preshock free silicon (=1 or 10%) is shown for each model.

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