A GAS GIANT CIRCUMBINARY PLANET TRANSITING THE F STAR PRIMARY OF THE ECLIPSING BINARY STAR KIC 4862625 AND THE INDEPENDENT DISCOVERY AND CHARACTERIZATION OF THE TWO TRANSITING PLANETS IN THE KEPLER-47 SYSTEM

作者：Kostov V B^*; McCullough P R; Hinse T C; Tsvetanov Z I; Hebrard G; Diaz R F; Deleuil M; Valenti J A

来源：Astrophysical Journal, 2013, 770(1): 52.

DOI：10.1088/0004-637X/770/1/52

• binaries: eclipsing
• planetary systems
• stars: individual (KIC 4862625 Kepler-47)
• techniques: photometric

We report the discovery of a transiting, gas giant circumbinary planet orbiting the eclipsing binary KIC 4862625 and describe our independent discovery of the two transiting planets orbiting Kepler-47. We describe a simple and semi-automated procedure for identifying individual transits in light curves and present our follow-up measurements of the two circumbinary systems. For the KIC 4862625 system, the 0.52 +/- 0.018 R-Jupiter radius planet revolves every similar to 138 days and occults the 1.47 +/- 0.08 M-circle dot, 1.7 +/- 0.06 R-circle dot F8 IV primary star producing aperiodic transits of variable durations commensurate with the configuration of the eclipsing binary star. Our best-fit model indicates the orbit has a semi-major axis of 0.64 AU and is slightly eccentric, e = 0.1. For the Kepler-47 system, we confirm the results of Orosz et al. Modulations in the radial velocity of KIC 4862625A are measured both spectroscopically and photometrically, i.e., via Doppler boosting, and produce similar results.

• 出版日期2013-6-10