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2 results

  • High Resolution Magnetic Field Measurements in the Sunspot Photosphere
  • Axel Hofmann, Wolfgang Schmidt, Horst Balthasar, Theodore T. Tarbell, Zoe A. Frank
  • Journal: International Astronomical Union Colloquium / Volume 141 / 1993
  • Published online by Cambridge University Press: 12 April 2016, pp. 11-19
  • Print publication: 1993
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    We analysed calibrated Stokes V magnetograms and simultaneously measured Stokes I spectra of high spatial and spectral resolution taken in a medium sized sunspot. We found a clear (anti-) correlation between the brightness variation of penumbral structures and the longitudinal component (B*cosγ) of the magnetic field. No azimuthal variation of the amount of the magnetic field strength (B) was observed across dark and bright structures. There the field is more vertical in bright filaments compared to dark ones.