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Fig. 14

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Thermal evolution in the Si/S, O/Si/S, O/Ne/Mg O/C zones, for models with different χ values. Assuming dust formation to begin at 2000 K, the models predicts an on-set of this sometime in the time interval 250–380 days. At high χ the first dust formed would be carbonaceous (in the O/C zone), whereas at low χ-values it would be silicate-based (in the Si/S and O/Si/S zones).

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