Transiting circumbinary planets Kepler-34 b and Kepler-35 b
| Autor: | Steve B. Howell, Joshua A. Carter, Jonathan J. Fortney, William D. Cochran, Daniel C. Fabrycky, Samuel N. Quinn, Guillermo Torres, Donald R. Short, Michael R. Haas, Howard Isaacson, Eric B. Ford, Erik Brugamyer, Elisa V. Quintana, Paul Robertson, Andrej Prsa, Michael Endl, Jerome A. Orosz, Natalie M. Batalha, David R. Ciardi, Tsevi Mazeh, Douglas A. Caldwell, Lars A. Buchhave, William J. Borucki, David W. Latham, Thomas N. Gautier, Ronald L. Gilliland, Jack J. Lissauer, Laurance R. Doyle, Avi Shporer, William F. Welsh, Todd C. Klaus, Caroline Caldwell, Darin Ragozzine, Jie Li, Matthew J. Holman, David G. Koch, Thomas Barclay, Gur Windmiller, Steven Bloemen, Jon M. Jenkins, Jessie L. Christiansen, Geoffrey W. Marcy, Andrew W. Howard, Jason H. Steffen, Joshua N. Winn, Jennifer R. Hall |
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| Rok vydání: | 2012 |
| Předmět: |
Physics
Multidisciplinary Extraterrestrial Environment K-type main-sequence star Planets Astronomy Astrophysics Space Flight Habitability of orange dwarf systems Galaxy Kepler-47 Stars Stars Celestial Planet Binary star Astrophysics::Solar and Stellar Astrophysics Astrophysics::Earth and Planetary Astrophysics Spacecraft Circumbinary planet Astrophysics::Galaxy Astrophysics |
| Zdroj: | Nature. 481:475-479 |
| ISSN: | 1476-4687 0028-0836 |
| Popis: | Most Sun-like stars in the Galaxy reside in gravitationally bound pairs of stars (binaries). Although long anticipated, the existence of a 'circumbinary planet' orbiting such a pair of normal stars was not definitively established until the discovery of the planet transiting (that is, passing in front of) Kepler-16. Questions remained, however, about the prevalence of circumbinary planets and their range of orbital and physical properties. Here we report two additional transiting circumbinary planets: Kepler-34 (AB)b and Kepler-35 (AB)b, referred to here as Kepler-34 b and Kepler-35 b, respectively. Each is a low-density gas-giant planet on an orbit closely aligned with that of its parent stars. Kepler-34 b orbits two Sun-like stars every 289 days, whereas Kepler-35 b orbits a pair of smaller stars (89% and 81% of the Sun's mass) every 131 days. The planets experience large multi-periodic variations in incident stellar radiation arising from the orbital motion of the stars. The observed rate of circumbinary planets in our sample implies that more than ∼1% of close binary stars have giant planets in nearly coplanar orbits, yielding a Galactic population of at least several million. |
| Databáze: | OpenAIRE |
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