Journal: Astronomy and Astrophysics

  • Publication
    An active region filament studied simultaneously in the chromosphere and photosphere. I. Magnetic structure
    Aims: A thorough multiwavelength, multiheight study of the vector magnetic field in a compact active region filament (NOAA 10781) on 2005 July 3 and 5 is...
  • Publication
    An active region filament studied simultaneously in the chromosphere and photosphere. II. Doppler velocities<xref ref-type="fn" rid="FN1">
    Context. Paper I presents the magnetic structure, inferred for the photosphere and the chromosphere, of a filament that developed in active region (AR) NOAA...
  • Publication
    An almost dark galaxy with the mass of the Small Magellanic Cloud
    Almost dark galaxies are objects that have eluded detection by traditional surveys such as the Sloan Digital Sky Survey (SDSS). The low surface brightness of...
  • Publication
    An Alternative Procedure for Extracting IUE Low Resolution Spectra
    This paper presents an alternative procedure which extracts spectra from IUE low resolution images. The -by-line image is scanned perpendicularly to the...
  • Publication
    An analysis of HST UV spectra of Cyg OB2 stars
    As a first step of a vigorous program to investigate the Wind Momentum - Luminosity Relationship (WLR) of Galactic O-stars by analyzing stars belonging to the...
  • Publication
    An analysis of STIS HST UV spectra of M 33 early B supergiants
    We present terminal velocities of M 33 B-supergiants, obtained from STIS HST spectra as part of our programme to investigate the Wind Momentum - Luminosity...
  • Publication
    An artificial neural network approach to the solution of molecular chemical equilibrium
    A novel approach is presented for the solution of instantaneous chemical equilibrium problems. The chemical equilibrium can be considered, due to its...
  • Publication
    An eclipsing double-line spectroscopic binary at the stellar/substellar boundary in the Upper Scorpius OB association
    Aims: We aim at constraining evolutionary models at low mass and young ages by identifying interesting transiting system members of the nearest OB association...
  • Publication
    An effective temperature calibration for solar type stars using equivalent width ratios. A fast and easy spectroscopic temperature estimation
    Aims: Precise determination of the stellar effective temperature of solar type stars is extremely important for astrophysics. We present an effective...