Journal: Astronomy and Astrophysics

  • 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...
  • Publication
    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...
  • Publication
    Fundamental physics with ESPRESSO: Constraining a simple parametrisation for varying α
    Context. The spectrograph ESPRESSO recently obtained a limit on the variation of the fine-structure constant, α, through measurements along the line of sight of...
  • Publication
    Fundamental physics with ESPRESSO: Precise limit on variations in the fine-structure constant towards the bright quasar HE 0515−4414
    The strong intervening absorption system at redshift 1.15 towards the very bright quasar HE 0515−4414 is the most studied absorber for measuring possible...
  • Publication
    Fundamental physics with ESPRESSO: Towards an accurate wavelength calibration for a precision test of the fine-structure constant
    Observations of metal absorption systems in the spectra of distant quasars allow one to constrain a possible variation of the fine-structure constant throughout...
  • Publication
    Fundamental properties of five Kepler stars using global asteroseismic quantities and ground-based observations
    We present an asteroseismic study of the solar-like stars KIC 11395018, KIC 10273246, KIC 10920273, KIC 10339342, and KIC 11234888 using short-cadence time...
  • Publication
    Fundamental transverse vibrations of the active region solar corona
    Context. Some high-resolution observations have revealed that the active region solar corona is filled with a myriad of thin strands even in apparently uniform...