A Model for Low Temperature Crystallization of Silicate Dust in Protoplanetary Disks

Details A Model for Low Temperature Crystallization of Silicate Dust in Protoplanetary Disks A Model for Low Temperature Crystallization of Silicate Dust in Protoplanetary Disks

Aug 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aipc.1158...93y&link_type=abstract

EXOPLANETS AND DISKS: THEIR FORMATION AND DIVERSITY: Proceedings of the International Conference. AIP Conference Proceedings, V

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Circumstellar Shells, Clouds, And Expanding Envelopes, Circumstellar Masers, Kinetics Of Defect Formation And Annealing, Accretion And Accretion Disks

Scientific paper

We analyzed the mechanism of low-temperature crystallization of an amorphous silicate grain due to exothermic chemical reactions in the surface layer of the grains as demonstrated experimentally (Kaito et al. 2007, ApJ. 666, L57). We constructed a model of the crystallization and derived the crystallization conditions of the amorphous silicate core of the grain. The analysis enables us to obtain the crystallization conditions in protoplanetary disks. Our results suggest that silicate crystallization occurs in a wider variety of conditions than hitherto considered.

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