Computer Science
Scientific paper
May 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006sptz.prop30590v&link_type=abstract
Spitzer Proposal ID #30590
Computer Science
Scientific paper
Water and carbon monoxide are predicted to be among the most abundant species in the atmosphere of Hot Jupiters. Here we propose to observe the signatures of these two crucial species in the atmosphere of the exoplanet transiting the bright star HD189733. The detection of the spectral signatures of H2O and CO will be performed in absorption during a primary transit observed in the four IRAC bands, at 3.6, 4.5, 5.8 and 8 microns. This method would sample long grazing lines of sights through the atmosphere at the two terminator limbs, in the 10^-2 to 10^-3 bar pressure range. Such a program is complementary to the exoplanet infrared emissions studies performed through secondary transits, as it allows the atmosphere to be probed at higher altitudes and lower pressure ranges, through simple absorption technic. From this observation we will be able to better constrain the planetary atmosphere models, their composition and possibly find the signature of planetary formation with various C/O ratios.
Bouchy Francois
Desert Jean-Michel
Ehrenreich David
Ferlet Roger
Hebrard Guillaume
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