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A Precise Estimate of the Radius of HD 149026b
Philip Nutzman, David Charbonneau, Joshua N. Winn +4
We present Spitzer 8 micron transit observations of the extrasolar planet system HD 149026. At this wavelength, transit light curves are weakly affected by stellar limb-darkening,…
Synthetic Spectra and Colors of Young Giant Planet Atmospheres: Effects of Initial Conditions and Atmospheric Metallicity
Jonathan J. Fortney, Mark S. Marley, Didier Saumon +1
We examine the spectra and infrared colors of the cool methane-dominated atmospheres at Teff < 1400 K expected for young gas giant planets. We couple these spectral calculations to…
A Precise Estimate of the Radius of the Exoplanet HD 149026b from Spitzer Photometry
Philip Nutzman, David Charbonneau, Joshua N. Winn +4
We present Spitzer 8 micron transit observations of the extrasolar planet HD 149026b. At this wavelength, transit light curves are weakly affected by stellar limb-darkening, allowi…
Multi-Wavelength Constraints on the Day-Night Circulation Patterns of HD 189733b
Heather A. Knutson, David Charbonneau, Nicolas B. Cowan +6
We present new Spitzer observations of the phase variation of the hot Jupiter HD 189733b in the MIPS 24 micron bandpass, spanning the same part of the planet's orbit as our previou…
The Impact of Transit Observations on Planetary Physics
Jonathan J. Fortney
We highlight the importance of transit observations on understanding the physics of planetary atmospheres and interiors. Transmission spectra and emission spectra allow us to chara…