Astrophysical: Sunspots

  • Publication
    Thermal-magnetic relation in a sunspot and a map of its Wilson depression
    We present relations between thermal and magnetic quantities in a simple, isolated sunspot, as deduced from the inversion of 1.56 μm spectropolarimetric data...
  • Publication
    Thermal-magnetic relation of a sunspot as inferred from the inversion of 1.5 μm spectral data
    We present the thermal-magnetic relation in a simple, isolated sunspot deduced from the inversion of 1.56 μm spectropolarimetric data. Due to the high Zeeman...
  • Publication
    Three dimensional structure of a regular sunspot from the inversion of IR Stokes profiles
    The magnetic, thermal and velocity structure of a regular sunspot, observed close to solar disk center is presented. Spectropolarimetric data obtained with the...
  • Publication
    Three-dimensional structure of a sunspot light bridge
    Context. Active regions are the most prominent manifestations of solar magnetic fields; their generation and dissipation are fundamental problems in solar...
  • Publication
    Tracing p-mode Waves from the Photosphere to the Corona in Active Regions
    Atmosphere above sunspots is abundant with different types of waves. Among these waves are running penumbral waves in the chromosphere, quasi-periodic...
  • Publication
    Turbulent Erosion of Magnetic Flux Tubes
    Results from a numerical and analytical investigation of the solution of a nonlinear axisymmetric diffusion equation for the magnetic field are presented for...
  • Publication
    Twist, Writhe, and Helicity in the Inner Penumbra of a Sunspot
    The aim of this work is the determination of the twist, writhe, and self-magnetic helicity of penumbral filaments located in an inner sunspot penumbra. For this...
  • Publication
    Two magnetic components in sunspot penumbrae
    The magnetic and kinematic configuration of sunspot penumbrae is investigated by performing an inversion of the Stokes profiles of three infrared lines at 1565...
  • Publication
    Umbral dots - A case of penetrative convection between sunspot fragments
    A study of the observations made on the development and, in some cases, even the decay of 15 large active regions is presented. It is shown that the mature...