New Results of 2D-Spectroscopy of Sunspots - Temporal Variations of the Magnetic Field

Details New Results of 2D-Spectroscopy of Sunspots - Temporal Variations of the Magnetic Field New Results of 2D-Spectroscopy of Sunspots - Temporal Variations of the Magnetic Field

Sep 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999aspc..184..141b&link_type=abstract

Third Advances in Solar Physics Euroconference: Magnetic Fields and Oscillations, ASP Conference Series vol.184, p. 141-145. Eds

Physics

5

Sunspots, Magnetic Field, Temporal Variations

Scientific paper

Two-dimensional spectra of a sunspot were obtained at the German Vacuum Tower Telescope (VTT) on Tenerife using the 2D-spectrometer of the Göttingen observatory. The magnetic field strength is derived from the I-profiles of the Fe I line at 684.3 nm. Temporal variations of the magnetic field occur at the umbra-penumbra transition of larger spots and in the central part of some small spots and pores. A clear coherence between the variations of the magnetic field and those of intensities or Doppler shifts is not detected.

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