Spectroscopic parameters for 451 stars in the HARPS GTO planet search program - Stellar [Fe/H] and the frequency of exo-Neptunes

  title={Spectroscopic parameters for 451 stars in the HARPS GTO planet search program - Stellar [Fe/H] and the frequency of exo-Neptunes},
  author={S{\'e}rgio G. Sousa and Nuno C. Santos and Michel Mayor and St{\'e}phane Udry and Luca Casagrande and Garik Israelian and Francesco A. Pepe and Didier Queloz and M{\'a}rio J. P. F. G. Monteiro},
  journal={Astronomy and Astrophysics},
To understand the formation and evolution of solar-type stars in the solar neighborhood, we need to measure their stellar parameters to high accuracy. We present a catalogue of accurate stellar parameters for 451 stars that represent the HARPS Guaranteed Time Observations (GTO) “high precision” sample. Spectroscopic stellar parameters were measured using high signal-to-noise ($S/N$) spectra acquired with the HARPS spectrograph. The spectroscopic analysis was completed assuming LTE with a grid… 

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