Astrophysical: Sunspots

  • Publication
    The magnetic canopy above light bridges
    An analysis of high-resolution Stokes observations of two light bridges in active region NOAA 8990 is presented. The observations were recorded with the La...
  • Publication
    The magnetic nature of umbra-penumbra boundary in sunspots
    Context. Sunspots are the longest-known manifestation of solar activity, and their magnetic nature has been known for more than a century. Despite this, the...
  • Publication
    The Magnetic Response of the Solar Atmosphere to Umbral Flashes
    Chromospheric observations of sunspot umbrae offer an exceptional view of magnetoacoustic shock phenomena and the impact they have on the surrounding...
  • 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 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 Possible Ascent of a Closed Magnetic System through the Photosphere
    We present a comprehensive interpretation of the evolution of a small magnetic region observed during its entire disk passage. The vector magnetic field...
  • News
    The presence of resonating cavities above sunspots has been confirmed
    An international team of researchers, led by the Instituto de Astrofísica de Canarias (IAC), has confirmed the existence of resonant cavities above sunspots...
  • Publication
    The return of FarNet-II: Generation of solar far-side magnetograms from helioseismic data
    Context. The far-side activity of the Sun can be inferred by interpreting the near-side wave field using local helioseismic techniques. However, detections are...
  • Publication
    The role of the chromospheric magnetic canopy in the formation of a sunspot penumbra
    Context. While it is conjectured that a chromospheric canopy plays a role in penumbra formation, it has been difficult to find observational evidence of the...