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Spitzer Secondary Eclipses of the Dense, Modestly-irradiated, Giant Exoplanet HAT-P-20b Using Pixel-Level Decorrelation
Drake Deming, Heather Knutson, Joshua Kammer +13
HAT-P-20b is a giant exoplanet that orbits a metal-rich star. The planet itself has a high total density, suggesting that it may also have a high metallicity in its atmosphere. We…
Atmospheric Circulation of Eccentric Hot Jupiter HAT-P-2b
Nikole K. Lewis, Adam P. Showman, Jonathan J. Fortney +2
The hot-Jupiter HAT-P-2b has become a prime target for Spitzer Space Telescope observations aimed at understanding the atmospheric response of exoplanets on highly eccentric orbits…
Constraints on the Atmospheric Circulation and Variability of the Eccentric Hot Jupiter XO-3b
Ian Wong, Heather A. Knutson, Nicolas B. Cowan +9
We report secondary eclipse photometry of the hot Jupiter XO-3b in the 4.5~m band taken with the Infrared Array Camera (IRAC) on the Spitzer Space Telescope. We measure individu…
The 4.5 m full-orbit phase curve of the hot Jupiter HD 209458b
Robert T. Zellem, Nikole K. Lewis, Heather A. Knutson +10
The hot Jupiter HD 209458b is particularly amenable to detailed study as it is among the brightest transiting exoplanet systems currently known (V-mag = 7.65; K-mag = 6.308) and ha…
Atmospheric Characterization of the Hot Jupiter Kepler-13Ab
Avi Shporer, Joseph G. O'Rourke, Heather A. Knutson +12
Kepler-13Ab (= KOI-13.01) is a unique transiting hot Jupiter. It is one of very few known short-period planets orbiting a hot A-type star, making it one of the hottest planets curr…
Features in the Broadband Eclipse Spectra of Exoplanets: Signal or Noise?
C. J. Hansen, J. C. Schwartz, N. B. Cowan
A planet's emission spectrum contains information about atmospheric composition and structure. We compare the Bayesian Information Criterion (BIC) of blackbody fits and idealized s…