A Planet Orbiting the Star ρ Coronae Borealis

  title={A Planet Orbiting the Star $\rho$ Coronae Borealis},
  author={Robert W. Noyes and Saurabh W. Jha and Sylvain Gereon Korzennik and Martin Krockenberger and Peter Nisenson and Timothy M. Brown and Edward J. Kennelly and Scott Donald Horner},
  journal={The Astrophysical Journal Letters},
  pages={L111 - L114}
We report the discovery of near-sinusoidal radial velocity variations of the G0V star ρ CrB, with period 39.6 days and amplitude 67 m s-1. These variations are consistent with the existence of an orbital companion in a circular orbit. Adopting a mass of 1.0 M☉ for the primary, the companion has minimum mass about 1.1 Jupiter masses and orbital radius about 0.23 AU. Such an orbital radius is too large for tidal circularization of an initially eccentric orbit during the lifetime of the star, and… 

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