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Paper: New Results of 2D-Spectroscopy of Sunspots - Temporal Variations of the Magnetic Field
Volume: 184, Third Advances in Solar Physics Euroconference: Magnetic Fields and Oscillations
Page: 141
Authors: Balthasar, H.
Abstract: 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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