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arxiv: 1109.3432 · v1 · pith:W4DDK3ANnew · submitted 2011-09-15 · 🌌 astro-ph.EP

Kepler-16: A Transiting Circumbinary Planet

Laurance R. Doyle , Joshua A. Carter , Daniel C. Fabrycky , Robert W. Slawson , Steve B. Howell , Joshua N. Winn , Jerome A. Orosz , Andrej Prsa
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William F. Welsh Samuel N. Quinn David Latham Guillermo Torres Lars A. Buchhave Geoffrey W. Marcy Jonathan J. Fortney Avi Shporer Eric B. Ford Jack J. Lissauer Darin Ragozzine Michael Rucker Natalie Batalha Jon M. Jenkins William J. Borucki David Koch Christopher K. Middour Jennifer R. Hall Sean McCauliff Michael N. Fanelli Elisa V. Quintana Matthew J. Holman Douglas A. Caldwell Martin Still Robert P. Stefanik Warren R. Brown Gilbert A. Esquerdo Sumin Tang Gabor Furesz John C. Geary Perry Berlind Michael L. Calkins Donald R. Short Jason H. Steffen Dimitar Sasselov Edward W. Dunham William D. Cochran Alan Boss Michael R. Haas Derek Buzasi Debra Fischer
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keywords planetstarsorbitbodiescircumbinarythreeabsoluteacross
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We report the detection of a planet whose orbit surrounds a pair of low-mass stars. Data from the Kepler spacecraft reveal transits of the planet across both stars, in addition to the mutual eclipses of the stars, giving precise constraints on the absolute dimensions of all three bodies. The planet is comparable to Saturn in mass and size, and is on a nearly circular 229-day orbit around its two parent stars. The eclipsing stars are 20% and 69% as massive as the sun, and have an eccentric 41-day orbit. The motions of all three bodies are confined to within 0.5 degree of a single plane, suggesting that the planet formed within a circumbinary disk.

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