Journal: Astronomy and Astrophysics

  • Publication
    Spectroscopic and photometric evidence of two stellar populations in the Galactic globular cluster NGC 6121 (M 4)
    Aims: We present abundance analysis based on high resolution spectra of 105 isolated red giant branch (RGB) stars in the Galactic Globular Cluster NGC 6121 (M 4...
  • Publication
    Spectroscopic and physical parameters of Galactic O-type stars. I. Effects of rotation and spectral resolving power in the spectral classification of dwarfs and giants
    Context. The modern-era spectral classification of O-stars relies on either the Walborn or the Conti-Mathys scheme. Since both of these approaches have been...
  • Publication
    Spectroscopic and physical parameters of Galactic O-type stars. II. Observational constraints on projected rotational and extra broadening velocities as a function of fundamental parameters and stellar evolution
    Context. Rotation is of key importance for the evolution of massive star, including their fate as supernovae or gamma-ray bursts. However, the rotational...
  • Publication
    Spectroscopic and seismic analysis of red giants in eclipsing binaries discovered by Kepler
    Eclipsing binaries (EBs) are unique targets for measuring accurate stellar properties and constraining stellar evolution models. In particular, it is possible...
  • Publication
    Spectroscopic characterization of a sample of metal-poor solar-type stars from the HARPS planet search program. Precise spectroscopic parameters and mass estimation
    Stellar metallicity strongly correlates with the presence of planets and their properties. To check for new correlations between stars and the existence of an...
  • Publication
    Spectroscopic characterization of the known O-star population in Cygnus OB2. Evidence of multiple star-forming bursts
    Context. Cygnus OB2 provides a unique insight into the high-mass stellar content in one of the largest groups of young massive stars in our Galaxy. Although...
  • Publication
    Spectroscopic classification of a complete sample of astrometrically-selected quasar candidates using Gaia DR2
    Here we explore the efficiency and fidelity of a purely astrometric selection of quasars as point sources with zero proper motions in the Gaia data release 2...
  • Publication
    Spectroscopic classification of red high proper motion objects in the Southern Sky
    We present the results of spectroscopic follow-up observations for a sample of 71 red objects with high proper motions in the range 0.08-1.14 arcsec yr-1 as...
  • 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...