Astrofísicas: Evolución estelar

  • Publicación
    The intermediate age open cluster NGC 7044
    A photometric analysis is conducted of the open cluster NGC 7044, on the basis of UBVR CCD observations of 896 stars in the cluster field. Reddening and...
  • Publicación
    The Isaac Newton Telescope Monitoring Survey of Local Group Dwarf Galaxies. I. Survey Overview and First Results for Andromeda I
    An optical monitoring survey in nearby dwarf galaxies was carried out with the 2.5 m Isaac Newton Telescope. Fifty-five dwarf galaxies and four isolated...
  • Publicación
    The mass and helium discrepancy in massive stars: the case Vela X-1.
    A NLTE-analysis is presented of high S/N spectra of the optical component of the standard massive X-ray binary Vela X-1. In combination with the orbital...
  • Publicación
    The Missing Link? Discovery of Pulsations in the Nitrogen-rich PG 1159 Star PG 1144+005
    Up to 98% of all single stars will eventually become white dwarfs-stars that link the history and future evolution of the Galaxy, and whose previous evolution...
  • Publicación
    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...
  • Publicación
    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...
  • Publicación
    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...
  • Publicación
    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)...
  • Charla
    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...