The HARPS search for southern extra-solar planets: XVIII. An Earth-mass planet in the GJ 581 planetary system

@article{Mayor2009TheHS,
  title={The HARPS search for southern extra-solar planets: XVIII. An Earth-mass planet in the GJ 581 planetary system},
  author={M. Mayor and X. Bonfils and T. Forveille and X. Delfosse and S. Udry and J. Bertaux and H. Beust and F. Bouchy and C. Lovis and F. Pepe and C. Perrier and D. Queloz and N. Santos},
  journal={Astronomy and Astrophysics},
  year={2009},
  volume={507},
  pages={487-494}
}
  • M. Mayor, X. Bonfils, +10 authors N. Santos
  • Published 2009
  • Physics
  • Astronomy and Astrophysics
  • The GJ 581 planetary system was already known to harbour three planets, including two presumably rocky planets which straddle its habitable zone. We report here the detection of an additional planet ‐ GJ 581e ‐ with a minimum mass of 1.9 M" . With a period of 3.15 days, it is the innermost planet of the system and has a # 5% transit probability. We also correct our previous confusion of the orbital period of GJ 581d (the outermost planet) with a one-year alias, thanks to an extended time span… CONTINUE READING
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