Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008dps....40.3702c&link_type=abstract
American Astronomical Society, DPS meeting #40, #37.02; Bulletin of the American Astronomical Society, Vol. 40, p.463
Astronomy and Astrophysics
Astronomy
Scientific paper
The observational study of the atmospheres of exoplanets is now well underway, despite the fact that astronomers have not yet imaged these bodies directly. These advances are enabled by the discovery of planetary systems that are viewed nearly edge-on to our line-of-sight, such that the star and planet undergo periodic mutual eclipses. When the planet transits in front of the star, starlight passing through the outer scale heights of the atmosphere is attenuated in a wavelength-dependent fashion that encodes information about the atoms, molecules, and condensates that are present. Observations spanning times of secondary eclipse, when the planet passes out of view behind the star, permit the direct study of the planetary thermal emission and estimates of the dayside temperatures. Furthermore, by inverting the time-dependent changes in brightness as features on the planet rotate in and out of view, we have constructed longitudinally-resolved temperature maps. I will review these various rich datasets, which challenge our understanding of the atmospheres of Jovian planets under strong irradiation.
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