Astrophysical: Magnetic fields

  • Publication
    Temporal evolution of the Evershed flow in sunspots. I. Observational characterization of Evershed clouds
    Context: The magnetic and kinematic properties of the photospheric Evershed flow are relatively well known, but not completely understood. The evolution of the...
  • Publication
    The 1.5 meter solar telescope GREGOR
    The 1.5 m telescope GREGOR opens a new window to the understanding of solar small-scale magnetism. The first light instrumentation includes the Gregor Fabry...
  • Publication
    The 2024 May event in the context of auroral activity over the past 375 yr
    We survey 223 916 auroral records from the Northern hemisphere observed between 1650 January and 2024 July, making full allowance for the secular change in the...
  • Publication
    The 3D structure of the penumbra at high resolution from the bottom of the photosphere to the middle chromosphere
    Sunspots are the most prominent feature of the solar magnetism in the photosphere. Although they have been widely investigated in the past, their structure...
  • Publication
    The Ambipolar Filamentation in the Warm Ionized Medium
    We present the 2-D, two fluid (ions + neutrals) numerical simulations that we are carrying out in order to study the ambipolar filamentation process, in which a...
  • Publication
    The B Fields in OB Stars (BOB) Survey
    The B fields in OB stars (BOB) survey is an ESO large programme collecting spectropolarimetric observations for a large number of early-type stars in order to...
  • Publication
    The Calibration of the Advanced Stokes Polarimeter
    We describe and apply the methods that have been developed to calibrate the Advanced Stokes Polarimeter and to compensate for the polarization effects...
  • Publication
    The Canopy Structure above Light Bridges
    An analysis of high-resolution Stokes observations of two light bridges in the active region NOAA 8990 is presented. The observations were recorded with the La...
  • Publication
    The chromospheric component of coronal bright points. Coronal and chromospheric responses to magnetic-flux emergence
    Context. We investigate the chromospheric counterpart of small-scale coronal loops constituting a coronal bright point (CBP) and its response to a photospheric...