Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000aspc..196...99w&link_type=abstract
Thermal Emission Spectroscopy and Analysis of Dust, Disks, and Regoliths, Proceedings of a meeting held at at The Lunar and Plan
Astronomy and Astrophysics
Astronomy
7
Scientific paper
The analysis of the silicate mineralogy of comets, pre-main sequence T Tauri stars and Herbig Ae/Be stars, and main sequence β-Pic systems probes chemical and physical conditions in potentially planet-forming environments, condensation of dust from the gas-disk, accretion and annealing of interstellar amorphous silicates, and aggregation and accretion of these solids into planetesimals and comets. Ground-based and space-borne ISO spectroscopy of the 10 micron and 20 micron silicate resonances at medium to high resolution (R~= 200-1000) combined with analytical modeling efforts permits the testing of a current (Waelkens et al. 1999; Nuth 1999) yet unproved (van den Ancker et al. 1999) hypothesis that the degree of silicate crystallinity increases with age and disk evolutionary state. Correlating silicate mineralogy (including Mg-content and degree of crystallinity versus amorphousness) with age, disk properties, and circumstellar environment, develops the relationship between grain properties and protoplanetary disk evolution.
Harker David E.
Wooden Diane H.
Woodward Charles E.
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