Astrophysical: Magnetic fields

  • Publication
    Accretion and UV Variability in BP Tauri
    BP Tau is one of the few classical T Tauri stars for which the presence of a hot spot in the surface has been reported without ambiguity. The most likely source...
  • Publication
    Active Region Filaments Might Harbor Weak Magnetic Fields
    Recent spectropolarimetric observations of active region filaments have revealed polarization profiles with signatures typical of the strong field Zeeman regime...
  • Publication
    Active region fine structure observed at 0.08 arcsec resolution
    Context. The various mechanisms of magneto-convective energy transport determine the structure of sunspots and active regions. Aims: We characterise the...
  • Publication
    Active Region Magnetic Fields. I. Plage Fields
    We present observations taken with the Advanced Stokes Polarimeter (ASP) in active-region plages and study the frequency distribution of the magnetic field...
  • Publication
    Advanced Forward Modeling and Inversion of Stokes Profiles Resulting from the Joint Action of the Hanle and Zeeman Effects
    A big challenge in solar and stellar physics in the coming years will be to decipher the magnetism of the solar outer atmosphere (chromosphere and corona) along...
  • Publication
    Ambipolar diffusion in the Bifrost code
    Context. Ambipolar diffusion is a physical mechanism related to the drift between charged and neutral particles in a partially ionized plasma that is key to...
  • Publication
    Ambipolar diffusion: Self-similar solutions and MHD code testing. Cylindrical symmetry
    Context. Ambipolar diffusion is a process occurring in partially ionised astrophysical systems that imparts a complicated mathematical and physical nature to...
  • Publication
    Ambipolar filamentation of turbulent magnetic fields: a numerical simulation
    We present the results of a 2-D, two fluid (ions and neutrals) simulation of the ambipolar filamentation process, in which a magnetized, weakly ionized plasma...
  • Publication
    An application of an optimal statistic for characterizing relative orientations
    We present the projected Rayleigh statistic (PRS), a modification of the classic Rayleigh statistic, as a test for non-uniform relative orientation between two...