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    • Strong magnetic fields and unusual flows in sunspots 

      Castellanos Duran, Juan Sebastian (2023-02-06)
      This thesis presents a study of sunspots, which are the most prominent features observed on the solar surface. Their structure is governed by the magnetic field. The umbra and penumbra of sunspots harbor different strengths ...
    • Slender Ca II H fibrils observed by SUNRISE/SuFI 

      Gafeira, Ricardo Jorge Maranhas (2018-04-24)
      This thesis is devoted to analyzing the morphological and oscillatory properties of slender \caiih{} fibrils (SCFs) in the lower solar chromosphere. The aim of this study is to deepen our understanding of the physical ...