Atmosphere Models for the Brown Dwarf Gliese 229 B and the Extrasolar Giant Planets

Astronomy and Astrophysics – Astronomy

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Atmospheric Models, Brown Dwarf Stars, Extrasolar Planets, Thermal Emission, Potential Energy, Massive Stars, Infrared Radiation, Gravitational Fields, Gas Giant Planets

Scientific paper

Brown dwarfs inhabit a realm intermediate between the more massive stars and the less massive planets. Their thermal infrared emission is powered by the release of gravitational potential energy as regulated by their atmospheres. Long known only as theoretical constructs. the discovery of the first unimpeachable brown dwarf. Gliese 229 has opened up a new field: the study of brown dwarf atmospheres. The subsequent discovery of numerous extrasolar giant planets circling nearby stars, further demonstrated the need for a comprehensive modeling effort to understand this new class of jovian atmospheres. Although no spectra are yet available of the new planets, the next generation of groundbased and spacebased telescopes will return such data. Here author report on the effort with Ames collaborator Dr. Christopher McKay to better understand these new atmospheres.

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