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  • Wittenmyer, Robert A., et al. (author)
  • The Pan-Pacific Planet Search. VII. the Most Eccentric Planet Orbiting a Giant Star
  • 2017
  • In: The Astronomical Journal. - : American Astronomical Society. - 0004-6256 .- 1538-3881. ; 154:6
  • Journal article (peer-reviewed)abstract
    • Radial velocity observations from three instruments reveal the presence of a 4 M Jup planet candidate orbiting the K giant HD 76920. HD 76920b has an orbital eccentricity of 0.856 ±0.009, making it the most eccentric planet known to orbit an evolved star. There is no indication that HD 76920 has an unseen binary companion, suggesting a scattering event rather than Kozai oscillations as a probable culprit for the observed eccentricity. The candidate planet currently approaches to about four stellar radii from its host star, and is predicted to be engulfed on a ∼100 Myr timescale due to the combined effects of stellar evolution and tidal interactions.
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