Astrophysical: Magnetic fields

  • Publication
    On the Moat-Penumbra Relation
    Proper motions in a sunspot group with a δ-configuration and close to the solar disk center have been studied by employing local correlation tracking techniques...
  • Publication
    On the nature of kink MHD waves in magnetic flux tubes
    Context: Magnetohydrodynamic (MHD) waves are often reported in the solar atmosphere and usually classified as slow, fast, or Alfvén. The possibility that these...
  • Publication
    On the origin of magnetic driven winds and the structure of the galactic dynamo in isolated galaxies
    We investigate the build-up of the galactic dynamo and subsequently the origin of a magnetic driven outflow. We use a set-up of an isolated disc galaxy with a...
  • Publication
    On the origin of reverse polarity patches found by Hinode in sunspot penumbrae
    Context: The topology of penumbral magnetic fields is poorly known. The satellite Hinode has recently revealed penumbral structures of a magnetic polarity that...
  • Publication
    On the period ratio P1/2P2 in the oscillations of coronal loops
    Aims.With strong evidence of fast and slow magnetoacoustic modes arising in the solar atmosphere there is scope for improved determinations of coronal...
  • Publication
    On the Probable Existence of an Abrupt Magnetization in the Upper Chromosphere of the Quiet Sun
    We report on a detailed radiative transfer modeling of the observed scattering polarization in the Hα line, which allows us to infer quantitative information on...
  • Publication
    On the Robustness of the Pendulum Model for Large-amplitude Longitudinal Oscillations in Prominences
    Large-amplitude longitudinal oscillations (LALOs) in prominences are spectacular manifestations of solar activity. In such events nearby energetic disturbances...
  • Publication
    On the Scaling of the Damping Time for Resonantly Damped Oscillations in Coronal Loops
    There is not as yet full agreement on the mechanism that causes the rapid damping of the oscillations observed by TRACE in coronal loops. It has been suggested...
  • Publication
    On the sensitivity of the Halpha scattering polarization to chromospheric magnetism
    A particularly interesting line for exploring the physical conditions of the quiet solar chromosphere is Halpha , but its intensity profile is magnetically...