Journal: Astronomy and Astrophysics

  • Publication
    Spectroscopic follow-up of L- and T-type proper-motion member candidates in the Pleiades
    We report on the near-infrared (JHK-bands) low-resolution spectroscopy and red optical (Z-band) photometry of seven proper-motion, very low-mass substellar...
  • Publication
    Spectroscopic metallicities for planet-host stars: Extending the samples
    We present stellar parameters and metallicities for 29 planet-host stars, as well as for a large volume-limited sample of 53 stars not known to be orbited by...
  • Publication
    Spectroscopic observations of AB supergiants in M 33.
    We have observed 10 luminous blue stars in M 33 at intermediate dispersion and have determined spectral types and luminosity classes from the blue and red...
  • Publication
    Spectroscopic observations of the δ Scorpii binary during its recent periastron passage
    The bright star delta Sco has been considered a typical B0-type object for many years. Spectra of the star published prior to 1990 showed no evidence of...
  • Publication
    Spectroscopic parameters for 451 stars in the HARPS GTO planet search program. Stellar [Fe/H] and the frequency of exo-Neptunes
    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...
  • Publication
    Spectroscopic parameters for a sample of metal-rich solar-type stars
    Aims.To date, metallicity is the only parameter of a star that appears to clearly correlate with the presence of planets and their properties. To check for new...
  • Publication
    Spectroscopic parameters for solar-type stars with moderate-to-high rotation. New parameters for ten planet hosts
    Context. Planetary studies demand precise and accurate stellar parameters as input for inferring the planetary properties. Different methods often provide...
  • Publication
    Spectroscopic stellar parameters for 582 FGK stars in the HARPS volume-limited sample. Revising the metallicity-planet correlation
    To understand the formation and evolution of solar-type stars and planets in the solar neighborhood, we need to obtain their stellar parameters with high...
  • Publication
    Spectroscopic study of Ceres' collisional family candidates
    Context. Despite the observed signs of large impacts on the surface of Ceres, there is no confirmed collisional family associated with this dwarf planet. After...