TrES-2: The First Transiting Planet in the Kepler Field

Abstract

We announce the discovery of the second transiting hot Jupiter discovered by the Trans-atlantic Exoplanet Survey. The planet, which we dub TrES-2, orbits the nearby star GSC 03549-02811 every 2.47063 days. From high-resolution spectra, we determine that the star has T_eff = 5960 +/- 100 K and log(g) = 4.4 +/- 0.2, implying a spectral type of G0V and a mass of 1.08 +0.11/-0.05 M_sun. High-precision radial-velocity measurements confirm a sinusoidal variation with the period and phase predicted by the photometry, and rule out the presence of line-bisector variations that would indicate that the spectroscopic orbit is spurious. We estimate a planetary mass of 1.28 +0.09/-0.04 M_Jup. We model B, r, R, and I photometric timeseries of the 1.4%-deep transits and find a planetary radius of 1.24 +0.09/-0.06 R_Jup. This planet lies within the field of view of the NASA Kepler mission, ensuring that hundreds of upcoming transits will be monitored with exquisite precision and permitting a host of unprecedented investigations.

Accepted for publication in ApJL. 15 pages, 2 figures

References in corpus (3)

• Detection of Thermal Emission from an Extrasolar Planet
• TrES-1: The Transiting Planet of a Bright K0V Star
• The Challenge of Wide-Field Transit Surveys: The Case of GSC 01944-02289

Cited by in corpus (24)

• Homogeneous studies of transiting extrasolar planets. I. Light curve analyses
• Improving Stellar and Planetary Parameters of Transiting Planet Systems: The Case of TrES-2
• WASP-1b and WASP-2b: Two new transiting exoplanets detected with SuperWASP and SOPHIE
• HAT-P-1b: A Large-Radius, Low-Density Exoplanet Transiting one Member of a Stellar Binary
• HAT-P-7b: An Extremely Hot Massive Planet Transiting a Bright Star in the Kepler Field
• Absolute properties of the low-mass eclipsing binary CM Draconis
• Tidal Heating of Extra-Solar Planets
• Improved parameters for the transiting hot Jupiters WASP-4b and WASP-5b
• Homogeneous studies of transiting extrasolar planets. II. Physical properties
• A method for the direct determination of the surface gravities of transiting extrasolar planets
• Extrasolar Giant Planets and X-ray Activity
• WASP-14b: 7.3 Mj transiting planet in an eccentric orbit
• WASP-5b: a dense, very-hot Jupiter transiting a 12th-mag Southern-hemisphere star
• The Prograde Orbit of Exoplanet TrES-2b
• Periastron Precession Measurements in Transiting Extrasolar Planetary Systems at the Level of General Relativity
• The composition of transiting giant extrasolar planets
• A Photometric Survey for Variables and Transits in the Field of Praesepe with KELT
• Millimagnitude Photometry for Transiting Extrasolar Planetary Candidates: II. Transits of OGLE-TR-113-b in the Optical and Near-IR
• Detectability of Exoplanetary Transits from Radial Velocity Surveys
• Observational Window Functions in Planet Transit Surveys
• Observations of the transiting planet TrES-2 with the AIU Jena telescope in Großschwabhausen
• The NASA EPOXI mission of opportunity to gather ultraprecise photometry of known transiting exoplanets
• The NStED Exoplanet Transit Survey Service
• The NStED Stellar and Exoplanet Hosting Star Service