Publication type: Refereed

  • Publication
    Fundamental parameters and abundances of metal-poor stars: the SDSS standard BD +17 4708
    The atmospheric parameters and iron abundance of the Sloan Digital Sky Survey (SDSS) spectrophotometric standard star BD +17 4708 are critically examined using...
  • Publication
    Fundamental Parameters and Chemical Composition of Arcturus
    We derive a self-consistent set of atmospheric parameters and abundances of 17 elements for the red giant star Arcturus: T eff = 4286 ± 30 K, log g = 1.66 ± 0...
  • Publication
    Fundamental parameters of Galactic luminous OB stars VI. Temperatures, masses and WLR of Cyg OB2 supergiants
    We have analyzed six OB supergiants and one giant covering spectral types from O3 to B1 in the Galactic OB association Cyg OB2 by means of an updated version of...
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    Fundamental parameters of galactic luminous OB stars. II. A spectroscopic analysis of HDE 226868 and the mass of Cygnus X-1.
    We present a spectroscopic analysis of the O9.7 Iab star HDE 226868, which is the optical counterpart of Cygnus X-1. We use this extreme supergiant to test the...
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    Fundamental parameters of galactic luminous OB stars. III. Spectroscopic analysis of O stars in Cygnus OB2
    We present the results of the spectral analysis of 11 OB stars in Cyg OB2, among them seven giants and supergiants. The projected rotational velocities of these...
  • Publication
    Fundamental parameters of Galactic luminous OB stars. IV. The upper HR diagram
    We present observations and analyses of seven Galactic O stars of type O6 and earlier. The analyses are carried out using NLTE plane-parallel, hydrostatic...
  • Publication
    Fundamental parameters of Galactic luminous OB stars. V. The effect of microturbulence
    We study the effect of microturbulence in the line formation calculations of H and He lines, in the parameter range typical for O and early B stars. We are...
  • Publication
    Fundamental parameters of massive stars in multiple systems: The cases of HD 17505A and HD 206267A
    Context. Many massive stars are part of binary or higher multiplicity systems. The present work focusses on two higher multiplicity systems: HD 17505A and HD...
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    Fundamental parameters of nearby stars from the comparison with evolutionary calculations: masses, radii and effective temperatures
    The Hipparcos mission has made it possible to constrain the positions of nearby field stars in the colour-magnitude diagram with very high accuracy. These...