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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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