A comprehensive study of Kepler phase curves and secondary eclipses -- temperatures and albedos of confirmed Kepler giant planets

Abstract

We present a comprehensive study of phase curves and secondary eclipses in the Kepler data set using all data from 16 quarters that were available in 2013-2014. Our sample consists of 20 confirmed planets with R_p > 4 R_e ,P < 10d, V_mag < 15. Here we derive their temperatures and albedos, with an eye towards constraining models for the formation and evolution of such planets. Where there was overlap our results confirm parameters derived by previous studies, whereas we present new results for Kepler 1b-8b, 12b-15b, 17b, 40b, 41b, 43b, 44b, 76b, 77b, and 412b derived in a consistent manner. We also present lightcurve analyses for Kepler 91b and Kepler 74b, which both show extra dimmings at times other than from the expected primary and secondary eclipses. Corrected for thermal emission we find most of the massive planets from our sample to be low in albedo (<0.1) with a few having higher albedo (>0.1).

50 pages, 7 figures - PASP accepted

References in corpus (18)

• Prevalence of Earth-size planets orbiting Sun-like stars
• KEPLER's First Rocky Planet: Kepler-10b
• Validation of Kepler's Multiple Planet Candidates. III: Light Curve Analysis & Announcement of Hundreds of New Multi-planet Systems
• Terrestrial Planet Occurrence Rates for the Kepler GK Dwarf Sample
• An Earth-sized Planet in the Habitable Zone of a Cool Star
• Planetary Candidates Observed by Kepler VI: Planet Sample from Q1-Q16 (47 Months)
• Planetary Candidates Observed by Kepler IV: Planet Sample From Q1-Q8 (22 Months)
• HAT-P-7b: An Extremely Hot Massive Planet Transiting a Bright Star in the Kepler Field
• TrES-2: The First Transiting Planet in the Kepler Field
• Planetary Candidates Observed by Kepler V: Planet Sample from Q1-Q12 (36 Months)
• Discovery and Validation of Kepler-452b: A 1.6-Re Super Earth Exoplanet in the Habitable Zone of a G2 Star
• Atmospheric Characterization of the Hot Jupiter Kepler-13Ab
• Spin-Orbit Angles of Kepler-13Ab and HAT-P-7b from Gravity-Darkened Transit Light Curves
• A statistical search for a population of Exo-Trojans in the Kepler dataset
• SOPHIE velocimetry of Kepler transit candidates XI. Kepler-412 system: probing the properties of a new inflated hot Jupiter
• Photometry's bright future: Detecting Solar System analogues with future space telescopes
• SOPHIE velocimetry of Kepler transit candidates VI. An additional companion in the KOI-13 system
• Blue straggler masses from pulsation properties. II. Topology of the Instability Strip

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