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Warm Spitzer Photometry of XO-4b, HAT-P-6b and HAT-P-8b
Kamen O. Todorov, Drake Deming, Heather A. Knutson +11
We have analyzed Warm Spitzer/IRAC observations of the secondary eclipses of three planets, XO-4b, HAT-P-6b and HAT-P-8b. We measure secondary eclipse amplitudes at 3.6μm and 4.5μm…
Kepler 18-b, c, and d: A System Of Three Planets Confirmed by Transit Timing Variations, Lightcurve Validation, Spitzer Photometry and Radial Velocity Measurements
William D. Cochran, Daniel C. Fabrycky, Guillermo Torres +51
We report the detection of three transiting planets around a Sunlike star, which we designate Kepler-18. The transit signals were detected in photometric data from the Kepler satel…
Improved precision on the radius of the nearby super-Earth 55 Cnc e
M. Gillon, B. -O. Demory, B. Benneke +9
We report on new transit photometry for the super-Earth 55 Cnc e obtained with Warm Spitzer/IRAC at 4.5 microns. An individual analysis of these new data leads to a planet radius o…
Discovery and Atmospheric Characterization of Giant Planet Kepler-12b: An Inflated Radius Outlier
Jonathan J. Fortney, Brice-Olivier Demory, Jean-Michel Desert +34
We report the discovery of planet Kepler-12b (KOI-20), which at 1.695\pm0.030 RJ is among the handful of planets with super-inflated radii above 1.65 RJ. Orbiting its slightly evol…
Kepler and Ground-based Transits of the Exo-Neptune HAT-P-11b
Drake Deming, Pedro V. Sada, Brian Jackson +6
We analyze 26 archival Kepler transits of the exo-Neptune HAT-P-11b, supplemented by ground-based transits observed in the blue (B-band) and near-IR (J-band). Both the planet and h…
The hot-Jupiter Kepler-17b: discovery, obliquity from stroboscopic starspots, and atmospheric characterization
Jean-Michel Désert, David Charbonneau, Brice-Olivier Demory +38
This paper reports the discovery and characterization of the transiting hot giant exoplanet Kepler-17b. The planet has an orbital period of 1.486 days, and radial velocity measurem…