Astrophysical: Magnetic fields

  • Publication
    The magnetic sensitivity of the Ca II resonance and subordinate lines in the solar atmosphere
    Aims. The polarization of the Ca II resonant doublet (H and K lines) and subordinate infrared triplet lines are valuable observables for diagnosing the...
  • Publication
    The Magnetic Sensitivity of the Stokes I Profile of the 15260 Å Line of Mn I
    The near-IR line of Mn I at 15262.7 Å has recently been proposed as a new tool for diagnosing the magnetic field strength and magnetic energy density associated...
  • Publication
    The magnetic structure of pores and sunspots derived from Advanced Stokes Polarimeter data.
    We investigate the radial variation of the magnetic field structure across sunspots, pores and azimuth centers (ACs). We define ACs as magnetic structures of...
  • Publication
    The magnetic SW Sextantis star RXJ1643.7+3402
    We present time-resolved spectroscopy and circular spectropolarimetry of the SW Sex star RXJ1643.7+3402. We find significant polarization levels exhibiting a...
  • Publication
    The Magnetized Disk-Halo Transition Region of M51
    An excellent laboratory for studying large scale magnetic fields is the grand design face-on spiral galaxy M51. Due to wavelength-dependent Faraday...
  • Publication
    The Motion of Magnetic Flux Tubes in the Convection Zone and the Subsurface Origin of Active Regions
    The rise of kink-unstable magnetic flux tubes through the solar convection zone is discussed with a view to explaining the subsurface origin of active regions...
  • Publication
    The multi-component field topology of sunspot penumbrae. A diagnostic tool for spectropolarimetric measurements
    Context: .Sunspot penumbrae harbor highly structured magnetic fields and flows. The moving flux tube model offers an explanation for several observed phenomena...
  • Publication
    The Physical Origin of the Scattering Polarization of the Na I D Lines in the Presence of Weak Magnetic Fields
    We demonstrate that the atomic alignment of the hyperfine-structure components of the ground-level S1/2 of Na I and of the upper-level P1/2 of the D1 line are...
  • Publication
    The Physics of Twisted Magnetic Tubes Rising in a Stratified Medium: Two-dimensional Results
    The physics of a twisted magnetic flux tube rising in a stratified medium is studied using a numerical MHD code. The problem considered is fully compressible...