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Figure 6 | Earth, Planets and Space

Figure 6

From: The mineralogy and space weathering of a regolith grain from 25143 Itokawa and the possibility of annealed solar wind damage

Figure 6

An Avrami recrystallization model (based on Djouadi et al.[2005]). The time required for 1%, 5%, 95%, and 99% recrystallization of a thin olivine film is shown. The vertical dashed lines give the maximum subsolar temperatures at perihelion for current Itokawa (left) and an assumed extreme orbit (right). The horizontal dashed line indicates the upper estimated exposure age of Itokawa’s surface (Nagao et al. [2011]). The region between 650 and 700 K (dashed box) is particularly interesting because, here, recrystallization can occur on the time scales of thousands of years (see text).

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