Astrofísicas: Manchas solares

  • Publicación
    Unusual Stokes V profiles during flaring activity of a delta sunspot
    Aims: We analyze a set of full Stokes profile observations of the flaring active region NOAA 10808. The region was recorded with the Vector-Spectromagnetograph...
  • Publicación
    Upper chromospheric magnetic field of a sunspot penumbra: observations of fine structure
    Aims: The fine-structure of the magnetic field in a sunspot penumbra in the upper chromosphere is to be explored and compared to that in the photosphere...
  • Publicación
    Variation in sunspot properties between 1999 and 2011 as observed with the Tenerife Infrared Polarimeter
    Aims: We study the variation in the magnetic field strength and the umbral intensity of sunspots during the declining phase of the solar cycle No. 23 and in the...
  • Publicación
    Variation in sunspot properties between 1999 and 2014
    Aims: We study the variation in the magnetic field strength, area, and continuum intensity of umbrae in solar cycles 23 and 24. Methods: We analyzed a sample of...
  • Publicación
    Vector magnetic fields of emerging solar flux. I. Properties at the site of emergence
    Several small emerging bipolar regions have been observed with the Advanced Stokes Polarimeter (ASP), including extensive time series measurements of one small...
  • Publicación
    Vortex waves in sunspots
    Context. Waves in the magnetized solar atmosphere are one of the favourite means of transferring and depositing energy into the solar corona. The study of waves...