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Potential models of the unipolar sunspot magnetic field

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Abstract

The potential models of the unipolar sunspot magnetic field are calculated on the basis of magnetographic measurements of the magnetic field made in the three spectral lines of different intensities, Hα, Cai λ6103 and Fei λ4808. The computed distributions of the magnetic field vector are compared with actual distributions observed at these three levels. It is shown that the electric current density in the spot reaches values up to 105 CGSE in the volume contained between formation depths of two pairs of lines, Fei λ4808-Cai λ6103 and Fei λ4808 - Hα. Therefore, the magnetic field of the spot deviates strongly from a potential configuration. To the contrary, at higher levels, in the semi-infinite volume restricted at the bottom by the hydrogen Hα-line, the field appears to be quite close to a potential one.

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Authors and Affiliations

  1. Computing Center of the Siberian Branch of the Acad. Sci., 660049, Krasnoyarsk, U.S.S.R.

    V. V. Denisenko

  2. Crimean Astrophysical Observatory, 334413, Nauchny, Crimea, U.S.S.R.

    V. A. Kotov

  3. Krasnoyarsk State University, 660075, Krasnoyarsk, U.S.S.R.

    V. A. Romanov & V. S. Sokolov

Authors
  1. V. V. Denisenko
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  2. V. A. Kotov
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  3. V. A. Romanov
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  4. V. S. Sokolov
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Denisenko, V.V., Kotov, V.A., Romanov, V.A. et al. Potential models of the unipolar sunspot magnetic field. Sol Phys 81, 217–229 (1982). https://doi.org/10.1007/BF00151298

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  • DOI: https://doi.org/10.1007/BF00151298

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