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Paper: Strong Limits on the Infrared Spectrum of HD209458 b near 2.2 μm
Volume: 321, Extrasolar Planets: Today and Tomorrow
Page: 211
Authors: Richardson, L.J.; Deming, D.; Seager, S.
Abstract: We present a brief summary of observations of the transiting extrasolar planet, HD209458 b, designed to detect the secondary eclipse. We employ the method of 'occultation spectroscopy', which searches in combined light (star and planet) for the disappearance and reappearance of weak infrared spectral features due to the planet as it passes behind the star and reappears. We have searched for a continuum peak near 2.2 μm (defined by CO and H2O absorption bands), as predicted by some models of the planetary atmosphere to be ~ 6 × 10−4 of the stellar flux, but no such peak is detected at a level of ~ 3 × 10−4 of the stellar flux. Our results represent the strongest limits on the infrared spectrum of the planet to date and carry significant implications for understanding the planetary atmosphere.
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