Abstract
From investigating spectrograms of penumbrae of some sunspots it is concluded that the maximum magnetic field strength occurs in dark filaments and amounts to 1800–1900 G; the intensity of the magnetic field in dark filaments is 100–400 G larger than in the neighbouring bright filaments; the bright filaments seen in the space between the dark features cannot be attributed to the ordinary undisturbed photosphere.
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Abdussamatov, H.I. On fine structure of the magnetic field and brightness in the penumbrae of sunspots. Sol Phys 48, 117–119 (1976). https://doi.org/10.1007/BF00153337
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DOI: https://doi.org/10.1007/BF00153337