Measuring thermal emission of extrasolar giant planets with Spitzer

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Scientific paper

We propose to detect three close-in extrasolar giant planets, 51 Peg b, HD 209458 b, and HD 179949b, by measuring the color variations between 3.6 and 8 microns with IRAC as a function of orbital phase. This will constitute the first photometric detection of thermal emission from non-transiting giant planets. We will calibrate the day-night temperature asymmetry with a light curve of the transiting planet HD 209458, allowing us to measure the inclination and masses of the non-transiting planets and pave the way for observations of many other extrasolar giant planets with Spitzer.

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