Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010dps....42.2711v&link_type=abstract
American Astronomical Society, DPS meeting #42, #27.11; Bulletin of the American Astronomical Society, Vol. 42, p.1062
Astronomy and Astrophysics
Astronomy
Scientific paper
We use thermochemical equilibrium calculations to model Fe, Mg, and Si chemistry in the atmospheres of giant planets, brown dwarfs, and extrasolar giant planets. The chemical behavior of individual Fe, Mg, and Si gases and condensates is determined as a function of temperature, pressure, and metallicity. Our results are therefore, in principle, independent of any particular model atmospheric profile. The chemistry of these elements is very strongly effected by the condensation of iron metal, forsterite, and enstatite, which are expected to produce the most massive cloud layers in substellar atmospheres. Our model results are used to identify gases which may serve as indicators of weather, to predict the chemical composition of cloud layers, and to provide constraints for composition, structure, and opacity in the atmospheres of substellar objects.
Fegley Bruce
Lodders Katharina
Visscher Channon W.
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