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Exoplanets: The Road to Earth Twins

  • S. UdryEmail author
  • F. Pepe
  • C. Lovis
  • M. Mayor
  • the HARPS
  • ESPRESSO/CODEX Teams
Conference paper
Part of the Astrophysics and Space Science Proceedings book series (ASSSP)

Abstract

Recent HARPS discoveries have demonstrated that very quiet stars exist, with intrinsic radial-velocity variations below 1 m s−1. These results allow us in particular to characterize an emerging new population of very light planets down to a few Earth masses, as for example the components of a new 3-planet system, with masses between 3.6 and 8 M . Neptune-mass planets seem to be numerous. Their properties are especially important to constrain planet-formation models. Our HARPS experience also allows us to discuss the limitations of the radial-velocity method and the associated optimistic perspectives for the future detection of Earth-like planets in the Habitable Zone of solar-type stars, especially in the context of the foreseen development of ultra-stable spectrographs for the VLT (ESPRESSO) or the E-ELT (CODEX).

Keywords

Giant Planet Habitable Zone Planet Formation Orbital Solution Earth Twin 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science + Business Media B.V. 2009

Authors and Affiliations

  • S. Udry
    • 1
    Email author
  • F. Pepe
  • C. Lovis
  • M. Mayor
  • the HARPS
  • ESPRESSO/CODEX Teams
  1. 1.Geneva ObservatoryGeneva UniversityVersoixSwitzerland

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