Other
Scientific paper
Sep 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011ess.....2.4015s&link_type=abstract
American Astronomical Society, ESS meeting #2, #40.15
Other
Scientific paper
When a transiting planet is occulted by its host star, we are able to detect the emergent flux from the planet. Combining the timing of such occultations with radial velocity data allows a precise determination of the system's orbital eccentricity. Near-infrared measurements of the occultation depth yield the brightness temperature of the system at a particular wavelength, which can provide an estimate of the efficiency of the heat redistribution to the night-side of the planet. Measurements of the occultation depth at several wavelengths allow the construction of a spectral energy distribution for the planet and enable the atmospheric structure and composition to be inferred.
We have recently published Spitzer occultations of WASP-17b, which enabled the orbital eccentricity to be precisely determined, in turn allowing us to confirm the anomalously large planetary radius of 2.0 Jupiter radii. Another recently published result is a ground-based occultation of WASP-33b, which revealed it to be the hottest known exoplanet, with a brightness temperature of 3620 ± 225 K. I will present the latest results from our ongoing programme to measure the occultations of the WASP planets from both the ground and from space.
Smith Alexis
Wasp Consortium
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