Astrophysical: Stellar evolution

  • Publication
    The nature of the Kleinmann-Low nebula
    Recent data on, and interpretations of the Kleinmann-Low nebula are examined. It is suggested that associated high velocity gas is radiatively accelerated by a...
  • Publication
    The oldest galactic open clusters - New CCD photometry and colour-magnitude diagrams
    The paper presents CCD photometry for stars in three fields centered on the old open cluster NGC 188 and in four fields on the intermediate-age cluster NGC 7789...
  • Publication
    The Origin of Weakened Magnetic Braking in Old Solar Analogs
    The rotation rates of main-sequence stars slow over time as they gradually lose angular momentum to their magnetized stellar winds. The rate of angular momentum...
  • Publication
    The Pre-He White Dwarf in the Post-mass Transfer Binary EL CVn
    EL CVn is the prototype of a class of eclipsing binaries that consist of an A- or F-type main-sequence star and a hot, low-mass, pre-He white dwarf (pre-He WD)...
  • Talk
    The rotation of massive stars with and without compact companions
    Massive stars are generally fast rotators, however, with significant dispersion. We discuss the hypothesis that all OB stars are all born with very similar...
  • Talk
    The shady side of Stellar modelling and its grisly impact on Asteroseismology and Galactic Archeology
    Since the second half of last century, stellar evolution theory has allowed to understand the Color Magnitude Diagram of galactic star clusters, so that now we...
  • Publication
    The spectra of late-type dwarfs and sub-dwarfs in the near ultraviolet. I - Line identifications
    Spectra from IUE of 6 main sequence and near main sequence stars from classes A5 to G8, between 2700 A and 2900 A wavelength are described. In toto, some 250...
  • Publication
    Time-resolved photometry of BN and CU Cancri, two delta Scuti stars in the Praesepe cluster. Fourth photometry campaign of the STEPHI network
    The fourth photometry campaign of the Stellar photometry International (STEPHI) network was carried out in January 1992. On this occasion, the delta Scuti-like...
  • Publication
    Ultraviolet and infrared monitoring of FG Sagittae during 1982-1989 - Evolutionary status
    Ultraviolet IUE spectra and infrared JHKL photometry of FG Sge obtained over the period 1982-1989 indicate that the cooling rate of the star observed until...