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Transiting circumbinary planets Kepler-34 b and Kepler-35 b.

William F Welsh1, Jerome A Orosz, Joshua A Carter

  • 1Astronomy Department, San Diego State University, 5500 Campanile Drive, San Diego, California 92182, USA. wfw@sciences.sdsu.edu

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|January 13, 2012
PubMed
Summary
This summary is machine-generated.

Two new circumbinary planets, Kepler-34 b and Kepler-35 b, have been discovered orbiting pairs of stars. This suggests over 1% of binary stars host giant planets, indicating millions of such planets in our galaxy.

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Area of Science:

  • Astronomy and Astrophysics
  • Exoplanetary Science

Background:

  • Most Sun-like stars exist in binary systems.
  • Circumbinary planets, orbiting two stars, were theorized but lacked definitive proof until Kepler-16b.

Purpose of the Study:

  • To confirm the existence and study the properties of additional circumbinary planets.
  • To estimate the prevalence and galactic population of circumbinary planets.

Main Methods:

  • Utilized transit photometry data from the Kepler space telescope.
  • Analyzed light curves to detect planets passing in front of their host binary stars.

Main Results:

  • Discovered two transiting circumbinary planets: Kepler-34 b and Kepler-35 b.
  • Both are low-density gas giants in near-coplanar orbits with their host stars.
  • Kepler-34 b orbits its stars in 289 days; Kepler-35 b orbits its stars in 131 days.

Conclusions:

  • The discovery implies over 1% of close binary stars host giant planets in coplanar orbits.
  • This suggests a Galactic population of at least several million circumbinary planets.