Astrofísicas: Actividad solar

  • Charla
    Mysteries of the magnetic Sun
    The Sun presents us with many unsolved mysteries. In this talk I discuss three of them that have intrigued me for the last 50 years. Solar flares are the most...
  • Publicación
    New windows to the universe; Proceedings of the Eleventh European Regional Astronomy Meeting, Universidad de la Laguna, Spain, July 3-8, 1989. Part II
    Recent observational and theoretical investigations of the sun and sunlike stars and of galactic structure and evolution are discussed in reviews and reports...
  • Publicación
    Nonlinear time-evolution of kink-unstable magnetic flux tubes in the convective zone of the sun
    The nonlinear development of the kink instability in a horizontal magnetic flux tube with a field strength exceeding the equipartition value lying initially in...
  • Publicación
    Observations of the birth and fine structure of sunspot penumbrae
    High resolution white-light pictures of sunspot penumbrae are presented. These include pictures showing details of their filamentary structure and some...
  • Publicación
    On the age dependence of the asymmetry of penumbrae of sunspot
    The age dependence of the recently described asymmetry of penumbrae of large stable sunspots was analyzed. Young sunspots showed shorter eastern penumbrae...
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    On the initial orientation of emerging active regions
    The initial orientation of 74 active regions (ARs) as measured in high resolution pictures. As previous works by the author (Garcia de la Rosa, 1984) suggest a...
  • Publicación
    Photometry of sunspot penumbrae
    The authors present the results of a statistical analysis of the penumbra of sunspots. The intensity distribution, and several parameters derived from it, is...
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    Rise times of horizontal magnetic flux tubes in the convection zone of the sun
    Solutions of the equations describing the motion of a straight horizontal magnetic flux tube in the convection zone of the sun including inertial term and...
  • Publicación
    Seismic Holography of the Solar Interior near the Maximum and Minimum of Solar Activity
    The base of the convection zone and the tachocline play a major role in the study of the dynamics of the Sun, especially in the solar dynamo. Here, we present a...