HD45364, a pair of planets in a 3:2 mean motion resonance

  title={HD45364, a pair of planets in a 3:2 mean motion resonance},
  author={Alexandre C. M. Correia and St{\'e}phane Udry and Michel Mayor and W. Benz and J L Bertaux and François Bouchy and Jacques Laskar and Christophe Lovis and Christoph Mordasini and Francesco A. Pepe and Didier Queloz},
  journal={arXiv: Earth and Planetary Astrophysics},
Precise radial-velocity measurements with the HARPS spectrograph reveal the presence of two planets orbiting the solar-type star HD45364. The companion masses are 0.187 Mjup and 0.658 Mjup, with semi-major axes of 0.681 AU and 0.897 AU, and eccentricities of 0.168 and 0.097, respectively. A dynamical analysis of the system further shows a 3:2 mean motion resonance between the two planets, which prevents close encounters and ensures the stability of the system over 5 Gyr. This is the first time… 

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