Astrophysical: Magnetic fields

  • Publication
    HiPERCAM and TESS observations of the rapidly rotating M7V star LP 89─187
    The discovery of a significant number of rapidly rotating low-mass stars showing no or few flares in TESS observations was a surprise, as rapid rotation has...
  • Publication
    Horizontal flow fields in and around a small active region. The transition period between flux emergence and decay
    Context. The solar magnetic field is responsible for all aspects of solar activity. Thus, emergence of magnetic flux at the surface is the first manifestation...
  • Publication
    How to infer the Sun's global magnetic field using the Hanle effect
    We present a different approach to determine the characteristics of the global magnetic field of the Sun based on the study of the Hanle signals. The Hanle...
  • Talk
    IAU G5 Talk: Winds of Magnetic Massive Stars
    Massive stars (at least eight times as massive as the Sun) possess strong stellar winds driven by radiation. With the advent of the so called MiMeS...
  • Publication
    Improved detection of far-side solar active regions using deep learning
    Context. The analysis of waves on the visible side of the Sun allows the detection of active regions on the far side through local helioseismology techniques...
  • Publication
    Indication of the Hanle Effect by Comparing the Scattering Polarization Observed by CLASP in the Lyα and Si iii 120.65 nm Lines
    The Chromospheric Lyman-Alpha Spectro-Polarimeter is a sounding rocket experiment that has provided the first successful measurement of the linear polarization...
  • Publication
    Inference of electric currents in the solar photosphere
    Context. Despite their importance, routine and direct measurements of electric currents, j, in the solar atmosphere have generally not been possible. Aims: We...
  • Publication
    Inference of magnetic fields in the very quiet Sun
    Context. Over the past 20 yr, the quietest areas of the solar surface have revealed a weak but extremely dynamic magnetism occurring at small scales (
  • Publication
    Inference of the chromospheric magnetic field orientation in the Ca ii 8542 Å line fibrils
    Context. Solar chromospheric fibrils, as observed in the core of strong chromospheric spectral lines, extend from photospheric field concentrations suggesting...