Astrophysical: Solar granulation

  • Talk
    (1) The effect of magnetic fields on solar abundance determinations (2) The solar photosphere in 3D. This time from observations
    (1) In a recently published differential analysis (see Fabbian et al) we have derived abundance corrections for iron lines, using synthetic spectra from solar...
  • Publication
    A high-resolution study of the structure of sunspot light bridges and abnormal granulation
    Strong light bridges (SLBs) represent an abrupt change in the physical conditions of sunspot umbrae. They divide the umbra into separate units (fragments...
  • Publication
    A measurement of the background solar velocity spectrum
    Ten years of continuous measurements of the radial velocity of the Sun have been used to estimate the contribution of various solar surface phenomena to the...
  • Publication
    A new determination of the solar granulation contrast
    The contrast of the photospheric granulation in the centre of the disk at a wavelength of 500 nm has been determined by means of photographs taken during the...
  • Publication
    Are the small active regions related to the decay of the larger ones?
    To investigate the location of the actual limit for the different behavior, the active regions with fluxes greater than 10 to the 20 Mx are investigated. After...
  • Publication
    Asymmetries and shifts of the solar K I 7699 A line and possible evidence for gravity waves in the quiet photosphere
    A computing code has been developed to simulate the center-to-limb variation (CLV) of the bisector's shape, and absolute wavelength shift of the core in strong...
  • Publication
    Centre-to-limb variation of solar granulation along the equator and the central meridian
    The paper analyzes white-light images of solar granulation taken outside active regions, at regular intervals along the polar axis and the equator, in order to...
  • Talk
    Convectively driven vortex flows in the Sun
    We have discovered small whirlpools in the Sun, with a size similar to the terrestrial hurricanes (<0.5 Mm). The theory of solar convection predicts them, but...
  • Publication
    Detailed processes accompanying the decay of an active region
    The decay of a small solar active region is studied with high-resolution magnetograms. The reduction process made it possible to match intensity and magnetic...