Astrophysical: Magnetic fields

  • Publication
    Spectropolarimetric multi line analysis of stellar magnetic fields
    Aims: In this paper we study the feasibility of inferring the magnetic field from polarized multi line spectra using two methods: The pseudo line approach and...
  • Publication
    Spectropolarimetric observations of the solar atmosphere in the Hα 6563 Å line
    We present novel spectropolarimetric observations of the hydrogen Hα line taken with the Zürich Imaging Polarimeter (ZIMPOL) at the Gregory Coudé Telescope of...
  • Publication
    Spectropolarimetry in a sunspot penumbra. Spatial dependence of Stokes asymmetries in Fe I 1564.8 nm
    Stokes profiles of sunspot penumbrae show distinct asymmetries, which point to gradients in the velocity field and in the magnetic field. We present...
  • Publication
    Spectropolarimetry of a Decaying Sunspot Penumbra
    We report on high angular resolution, high-precision spectropolarimetric measurements of a decaying sunspot. The spot gradually lost its penumbra during the...
  • Publication
    Spectropolarimetry of solar faculae - High spatial resolution results
    A new method to measure the magnetic field strength of small-scale solar magnetic concentrations is presented. It is based on the center of gravity method...
  • Publication
    Spin depolarizing effect in collisions with neutral hydrogen. II. Application to simple/complex ions in spherically symmetric states
    Aims: We develop an accurate and general semi-classical formalism that deals with the definition and the calculation of the collisional depolarizing constants...
  • Publication
    Spot patterns and differential rotation in the eclipsing pre-cataclysmic variable binary, V471 Tau
    We present surface spot maps of the K2V primary star in the pre-cataclysmic variable binary system, V471 Tau. The spot maps show the presence of large high...
  • Talk
    Star and galaxy formation, then and now
    This lecture will address recent progress in modeling the emergence of cosmic structure at high redshifts. Also new insights gained from numerical simulations...
  • Publication
    Statistics of the polarized submillimetre emission maps from thermal dust in the turbulent, magnetized, diffuse ISM
    Context. The interstellar medium (ISM) is now widely acknowledged to display features ascribable to magnetized turbulence. With the public release of Planck...