Modelling Clouds in Brown Dwarfs and Planets

Details Modelling Clouds in Brown Dwarfs and Planets Modelling Clouds in Brown Dwarfs and Planets

May 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...210.9604m&link_type=abstract

American Astronomical Society Meeting 210, #96.04; Bulletin of the American Astronomical Society, Vol. 39, p.225

Astronomy and Astrophysics

Astronomy

1

Scientific paper

A method of modelling cloud opacity is required to characterize the atmospheres of brown dwarfs and giant planets. In my talk I will review the variety of approaches that have been used to study condensates in L dwarf atmospheres, focusing on the first and second generation models developed by Andy Ackerman and myself. I'll discuss the key physical inputs to the models and describe their application to near and mid-infrared spectra of both normal and atypical L dwarfs. Comparisons of the models to data help to illuminate the role of clouds in the L to T dwarf transition and suggest a possible new mechanism for the transition. One lesson from the study of clouds in L and T dwarfs is certainly that clouds will be a first order uncertainty in characterizing the atmospheres of extrasolar giant planets. Some of the challenges and signatures of clouds in EGPs will be considered.

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