Kepler-47: a transiting circumbinary multiplanet system

Jerome A. Orosz, William F. Welsh, Joshua A. Carter, Daniel C. Fabrycky, William D. Cochran, Michael Endl, Eric B. Ford, Nader Haghigipour, Philip J. MacQueen, Tsevi Mazeh, Roberto Sanchis-Ojeda, Donald R. Short, Guillermo Torres, Eric Agol, Lars A. Buchhave, Laurence R. Doyle, Howard Isaacson, Jack J. Lissauer, Geoffrey W. Marcy, Avi ShporerGur Windmiller, Thomas Barclay, Alan P. Boss, Bruce D. Clarke, Jonathan Fortney, John C. Geary, Matthew J. Holman, Daniel Huber, Jon M. Jenkins, Karen Kinemuchi, Ethan Kruse, Darin Ragozzine, Dimitar Sasselov, Martin Still, Peter Tenenbaum, Kamal Uddin, Joshua N. Winn, David G. Koch, William J. Borucki

225 Citations (Scopus)

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.

Original languageEnglish
JournalScience
Volume337
Issue number6101
Pages (from-to)1511-1514
Number of pages4
ISSN0036-8075
DOIs
Publication statusPublished - 21 Sept 2012

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