Journal: Astronomy and Astrophysics

  • Publication
    On the kinematics of the neutron star low mass X-ray binary Cen X-4
    We present the first determination of the proper motion of the neutron star low mass X-ray binary Cen X-4 measured from relative astrometry of the secondary...
  • Publication
    On the missing second generation AGB stars in NGC 6752
    In recent years the view of Galactic globular clusters as simple stellar populations has changed dramatically, it is now thought that basically all globular...
  • Publication
    On the morphology of sigma-drop galaxies
    Context: Local reductions of the stellar velocity dispersion in the central regions of galaxies are known as sigma-drops (σ-drops). Knowing the origin of these...
  • Publication
    On the most luminous planetary nebulae of M 31
    Context. The planetary nebula luminosity function (PNLF) is a standard candle that comprises a key rung on the extragalactic distance ladder. The method is...
  • Publication
    On the nature of candidate luminous blue variables in M 33
    Context. Luminous blue variables (LBVs) are a class of highly unstable stars that have been proposed to play a critical role in massive stellar evolution as...
  • Publication
    On the nature of kink MHD waves in magnetic flux tubes
    Context: Magnetohydrodynamic (MHD) waves are often reported in the solar atmosphere and usually classified as slow, fast, or Alfvén. The possibility that these...
  • Publication
    On the nature of lithium-rich giant stars. Constraints from beryllium abundances
    We have derived beryllium abundances for 7 Li-rich giant (A(Li) > 1.5) stars and 10 other Li-normal giants with the aim of investigating the origin of the...
  • Publication
    On the nature of the current GOLF p-mode signal
    The GOLF experiment on board SOHO is designed to measure global oscillations of the disk-integrated sunlight with high sensitivity and with long term stability...
  • Publication
    On the nature of the extragalactic number counts in the K-band
    Context: The galaxy number counts has been traditionally used to test models of galaxy evolution. However, the origin of significant differences in the shape of...