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Kepler-47: A Transiting Circumbinary Multiplanet System

Author(s)
Orosz, Jerome A.; Welsh, William F.; Carter, Joshua Adam; Fabrycky, Daniel C.; Cochran, William D.; Endl, Michael; Ford, Eric B.; Haghighipour, Nader; MacQueen, Phillip J.; Mazeh, Tsevi; Sanchis Ojeda, Roberto; Short, Donald R.; Torres, Guillermo; Agol, Eric; Buchhave, Lars A.; Doyle, Laurance R.; Isaacson, Howard; Lissauer, Jack J.; Marcy, Geoffrey W.; Shporer, Avi; Windmiller, Gur; Barclay, Thomas; Boss, Alan P.; Clarke, Bruce D.; Fortney, Jonathan J.; Geary, John C.; Holman, Matthew J.; Huber, Daniel; Jenkins, Jon M.; Kinemuchi, Karen; Kruse, Ethan; Ragozzine, Darin; Sasselov, Dimitar; Still, Martin; Tenenbaum, Peter; Uddin, Kamal; Winn, Joshua Nathan; Koch, David; Borucki, William J.; ... Show more Show less
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Abstract
We report the detection of Kepler-47, a system consisting of two planets orbiting around an eclipsing pair of stars. The inner and outer planets have radii 3.0 and 4.6 times that of Earth, respectively. The binary star consists of a Sun-like star and a companion roughly one-third its size, orbiting each other every 7.45 days. With an orbital period of 49.5 days, 18 transits of the inner planet have been observed, allowing a detailed characterization of its orbit and those of the stars. The outer planet’s orbital period is 303.2 days, and although the planet is not Earth-like, it resides within the classical “habitable zone,” where liquid water could exist on an Earth-like planet. With its two known planets, Kepler-47 establishes that close binary stars can host complete planetary systems.
Date issued
2012-08
URI
http://hdl.handle.net/1721.1/89172
Department
Massachusetts Institute of Technology. Department of Physics; MIT Kavli Institute for Astrophysics and Space Research
Journal
Science
Publisher
American Association for the Advancement of Science (AAAS)
Citation
Orosz, J. A., W. F. Welsh, J. A. Carter, D. C. Fabrycky, W. D. Cochran, M. Endl, E. B. Ford, et al. “Kepler-47: A Transiting Circumbinary Multiplanet System.” Science 337, no. 6101 (September 21, 2012): 1511–1514.
Version: Author's final manuscript
ISSN
0036-8075
1095-9203

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