Astrofísicas: Oscilaciones estelares

  • Charla
    The Kepler space mission sheds a new light on variable A- and F-type stars
    The Kepler spacecraft is providing photometric time series with micromagnitude precision for thousands of variable stars. The continuous time-series of...
  • Publicación
    The phase function for stellar acoustic oscillations. I - Theory
    The influence of the upper layers of a star on p-mode frequencies can be described asymptotically by means of a phase function, which depends essentially only...
  • Publicación
    The phase function for stellar acoustic oscillations. II - Effects of filtering
    Frequencies of solar acoustic oscillations can be analyzed asymptotically in terms of a function determined by the sound speed in the bulk of the sun and a...
  • Publicación
    The pulsating DA white dwarf PG2303+243 revisited
    An analysis of about 27 h of fast photometry of the cool ZZ Ceti white dwarf PG2303+243 reveals (1) the presence of many modes (as many as 22), some of them of...
  • Publicación
    The search for radial velocity variations in rapidly oscillating AP stars using the Fabry-Perot Interferometric Stellar Oscillation Spectrometer (FP-ISOS)
    Radial velocity measurements were taken of a group of Ap stars using an improved FP-ISOS. Observations were made using the 1.5m TCS on Tenerife in May 1987 and...
  • Charla
    Thermonuclear explosions on neutron stars
    I will review what we know about Type I Bursts (thermonuclear explosions on the surface of accreting Neutron Stars) and burst oscillations (fluctuations in the...
  • Publicación
    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...
  • Charla
    What spectra of massive B-stars can tell us about their binary and pulsational properties
    Spectroscopy is a powerful tool to unravel the nature of stellar bodies. For instance, spectra can be used to derive the temperature, gravity, and chemical...
  • Publicación
    Wind variability of LBV stars
    General properties of Luminous Blue Variables (LBV) have been reviewed by Lamers (1987). The LBV's are all close to the Humphreys-Davidson luminosity upper...