Evolving Optical Properties of Annealing Silicate Grains: From Amorphous Condensate to Crystalline Mineral
Open Access
- 20 May 2000
- journal article
- research article
- Published by American Astronomical Society in The Astrophysical Journal
- Vol. 535 (1), 247-255
- https://doi.org/10.1086/308810
Abstract
Laboratory studies of the evolution of a magnesium silicate smoke from an amorphous condensate to a crystalline mineral by annealing in vacuum provide a foundation for the development of a silicate evolution index (SEI). The SEI can be used to predict the emergent IR spectrum of silicate dust in a circumstellar shell based on the time-temperature history of the silicate grains in the outflow. Optical constants for the magnesium silicate smoke samples compatible with those of Draine & Lee are derived over the range 0.001-1000 μm.This publication has 12 references indexed in Scilit:
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