Photometrically derived masses and radii of the planet and star in the TrES-2 system

Abstract

We measure the mass and radius of the star and planet in the TrES-2 system using 2.7 years of observations by the Kepler spacecraft. The light curve shows evidence for ellipsoidal variations and Doppler beaming on a period consistent with the orbital period of the planet with amplitudes of 2.79+0.44-0.62 and 3.44+0.32-0.37 parts per million (ppm) respectively, and a difference between the day and night side planetary flux of 3.41+0.55-0.82 ppm. We present an asteroseismic analysis of solar-like oscillations on TrES-2A which we use to calculate the stellar mass of 0.94+/-0.05 MSun and radius of 0.95+/-0.02 RSun. Using these stellar parameters, a transit model fit and the phase curve variations, we determine the planetary radius of 1.162+0.020-0.024 RJup and derive a mass for TrES-2b from the photometry of 1.44+/-0.21 MJup. The ratio of the ellipsoidal variation to the Doppler beaming amplitudes agrees to better than 2σ with theoretical predications, while our measured planet mass and radius agree within 2-σ of previously published values based on spectroscopic radial velocity measurements. We measure a geometric albedo of 0.0136+0.0022-0.0033 and an occultation (secondary eclipse) depth of 6.5+1.7-1.8 ppm which we combined with the day/night planetary flux ratio to model the atmosphere of TReS-2b. We find an atmosphere model that contains a temperature inversion is strongly preferred. We hypothesize that the Kepler bandpass probes a significantly greater atmospheric depth on the night side relative to the day side.

Accepted for publication in ApJ

References in corpus (22)

• TrES-1: The Transiting Planet of a Bright K0V Star
• Efficient identification of exoplanetary transit candidates from SuperWASP light curves
• Improved spectroscopic parameters for transiting planet hosts
• Improving Stellar and Planetary Parameters of Transiting Planet Systems: The Case of TrES-2
• Inflating Hot Jupiters With Ohmic Dissipation
• Multi-Wavelength Constraints on the Day-Night Circulation Patterns of HD 189733b
• Fundamental Properties of Stars using Asteroseismology from Kepler & CoRoT and Interferometry from the CHARA Array
• Kepler constraints on planets near hot Jupiters
• The phase-dependent Infrared brightness of the extrasolar planet upsilon Andromedae b
• Dynamics and Disequilibrium Carbon Chemistry in Hot Jupiter Atmospheres, With Application to HD 209458b
• The Very Low Albedo of an Extrasolar Planet: MOST Spacebased Photometry of HD 209458
• The HARPS search for southern extra-solar planets. XIII. A planetary system with 3 Super-Earths (4.2, 6.9, & 9.2 Earth masses)
• TrES-2: The First Transiting Planet in the Kepler Field
• Radius determination of solar-type stars using asteroseismology: What to expect from the Kepler mission
• Verifying asteroseismically determined parameters of Kepler stars using hipparcos parallaxes: self-consistent stellar properties and distances
• The amplitude of solar oscillations using stellar techniques
• Homogeneous studies of transiting extrasolar planets. II. Physical properties
• Observational Evidence for Tidal Interaction in Close Binary Systems
• Demystifying Kepler Data: A Primer for Systematic Artifact Mitigation
• Analysis of Spitzer Spectra of Irradiated Planets: Evidence for Water Vapor?
• The Transit Light Curve Project. VI. Three Transits of the Exoplanet TrES-2
• A consistent analysis of three years of ground- and space-based photometry of TrES-2

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