Statistics – Computation
Scientific paper
Jan 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21740201s&link_type=abstract
American Astronomical Society, AAS Meeting #217, #402.01; Bulletin of the American Astronomical Society, Vol. 43, 2011
Statistics
Computation
1
Scientific paper
The Kepler and COROT missions and Earth-based observations detected putative rocky exoplanets. Some of the planets are exposed to extreme temperatures as they orbit close to their host stars, e.g., CoRot-7b. Such planets can develop atmospheres through (partial) vaporization of their exterior crusts or even mantle silicates. We investigated the chemical equilibrium composition of such heated systems from 500 - 4000 K and total pressures from 10-6 to 10+2.5 bars. The major gas phase species formed by the volatile elements H, C, N, O, and S, and the lithophile elements Na, K, Fe, Si, Mg, Al, Ca, and Ti are H2O and CO2 at low temperatures, and Na, K, O2, SiO, and O at high temperatures. The effects on overall elemental composition of the evaporated systems will be discussed. The computational results will be useful in planning spectroscopic studies of the atmospheres of hot Earth-like exoplanets. This work was supported by the NSF Astronomy Program and the NASA Astrobiology Program.
Fegley Bruce Jr.
Lodders Katharina
Schaefer Laura
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