Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009dps....41.3103m&link_type=abstract
American Astronomical Society, DPS meeting #41, #31.03
Astronomy and Astrophysics
Astronomy
Scientific paper
Observations of the transiting extrasolar planets, primarily from space by Spitzer Space Telescope and HST, have yielded a wealth of data, including brightness temperatures at multiple wavelengths of many planets, as well as orbital phase coverage of planetary thermal emission and transit spectra for the atmospheres of a few. Thermal emission spectra are also becoming available for the warm, directly imaged extrasolar planets found orbiting A stars, particularly for HR 8799 b, c, and d. These data have provided our first looks at the atmospheric thermal structure, composition, and dynamics of extrasolar giant planets. Not surprisingly we are now beginning to appreciate that--as in the solar system--there is apparently great variety in exoplanet atmospheres that reflect differences in formation history, radiative heating, photochemistry, and dynamics between planets. In my talk I will review some of what we have learned from our successes and failures in modeling exoplanet atmospheres, focusing on the issues most illuminated by the data currently in hand: atmospheric thermal structure, particularly including mechanisms for stratospheric heating, atmospheric chemistry and dynamics. I will also briefly look to the future and consider the prospects for planet characterization with JWST and space-based coronagraphs.
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