Computer Science
Scientific paper
Oct 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005sptz.prop..261c&link_type=abstract
Spitzer Proposal ID #261
Computer Science
Scientific paper
We propose to observe the newly-discovered transiting-planet system HD 189733 during two times of secondary eclipse, corresponding to the passage of the planet behind the star. Of the 4 known transiting planets accessible to Spitzer, this object offers by far the greatest signal-to-noise ratio, owing to both the apparent brightness of the system and the favorable ratio of the planetary flux to that of the star. By measuring the planetary flux in 5 band passes (3.6, 4.5, 5.8, 8.0, & 24 um), we will directly constrain models of the planetary emission, which in turn should allow identification of the molecules that dominate its spectrum. Moreover, high-cadence observations with IRAC during times of ingress and egress may permit us to spatially resolve the planetary emission over the surface of the planet, providing an unprecedented probe of the dynamics of these strongly irradiated exoplanet atmospheres. These observations will firmly establish Spitzer as the primary observatory in the nascent field of comparative exoplanetology.
Allen Lori
Barman Travis
Bouchy Francois
Brown Timothy
Charbonneau David
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