Tipo de publicación: Con árbitro

  • Publicación
    On the parallax of WD 0346++246: a halo white dwarf candidate
    We present a parallax measurement for the very cool degenerate WD 0346+246, the serendipitous discovery of which was reported by Hambly et al. We find an...
  • Publicación
    On The Parent Population of Radio Galaxies and the FR I-FR II Dichotomy
    We test the hypothesis that radio galaxies are a random subset of otherwise normal elliptical galaxies. Starting with the observed optical luminosity functions...
  • Publicación
    On the period ratio P1/2P2 in the oscillations of coronal loops
    Aims.With strong evidence of fast and slow magnetoacoustic modes arising in the solar atmosphere there is scope for improved determinations of coronal...
  • Publicación
    On the Period-Luminosity-Colour-Metallicity relation and the pulsational characteristics of lambda Bootis type stars
    Generally, chemical peculiarity found for stars on the upper main sequence excludes delta Scuti type pulsation (e.g. Ap and Am stars), but for the group of...
  • Publicación
    On the photospheric temperature in small-scale magnetic flux concentrations
    Results are presented of 2D radiative transfer calculations performed for geometric configurations that simulate partly evacuated small-scale magnetic flux...
  • Publicación
    On the physical conditions in AGN optical jets
    The energy budget of all known optical jets is discussed. It is found that to power the extended radio lobes of radio galaxies, the jet bulk motion on kpc...
  • Publicación
    On the physical origin of the second solar spectrum of the Sc II line at 4247 Å
    Context: The peculiar three-peak structure of the linear polarization profile shown in the second solar spectrum by the Ba ii line at 4554 Å has been...
  • Publicación
    On the Possible Existence of Short-Period g-Mode Instabilities Powered by Nuclear-Burning Shells in Post-Asymptotic Giant Branch H-Deficient (PG1159-Type) Stars
    We present a pulsational stability analysis of hot post-asymptotic giant branch (AGB) H-deficient pre-white dwarf stars with active He-burning shells. The...
  • Publicación
    On the possible triple central star system of PN SuWt 2: no ménage à trois at the heart of the Wedding Ring
    SuWt 2 is a planetary nebula consisting of a bright ring-like waist from which protrude faint extended lobes - a morphology believed to be typical of...