Journal: Astronomy and Astrophysics

  • 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...
  • Publication
    On the nature of transverse coronal waves revealed by wavefront dislocations
    Context. Coronal waves are an important aspect of the dynamics of the plasma in the corona. Wavefront dislocations are topological features of most waves in...
  • Publication
    On the nature of two low-dot{M} X-ray bursters: 1RXS J170854.4-321857 and 1RXS J171824.2-402934
    We carried out Chandra observations of two low-luminosity low-mass X-ray binaries, 1RXS J170854.4-321857 and 1RXS J171824.2-402934, for which previously single...
  • Publication
    On the origin of dwarf elliptical galaxies: the fundamental plane
    Context: Early-type dwarf (dE) galaxies are the most common type of galaxies observed in the Universe. Their study has important cosmological implications...