Publication type: Refereed

  • Publication
    On the Origin of Turbulence
    We are all familiar with the fact that a linear flow of water in a tube can be obtained only for velocities below a certain critical limit and that, when the...
  • Publication
    On the outburst amplitude of the soft X-ray transients
    We find a strong correlation between the optical outburst amplitude and orbital period for the soft X-ray transient sources with orbital periods less than 1 d...
  • Publication
    On the Pair-instability Supernova Origin of J1010+2358
    The first (Population III) stars formed only out of H and He and were likely more massive than present-day stars. Massive Population III stars in the range 140...
  • Publication
    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...
  • Publication
    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...
  • Publication
    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...
  • Publication
    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...
  • Publication
    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...
  • Publication
    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...