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On the topology of filaments and chromospheric fibrils near sunspots

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Abstract

The similarity between the spiral topology of chromospheric fibrils and filaments observed in Hα near sunspots and the configuration of an axisymmetric force-free magnetic field is examined. It is suggested that some of the observed features could be interpreted in terms of the configuration of lines of force of an axisymmetric force-free chromospheric magnetic field. Implications of the results of analysis to the possible interpretations of other observed topological features near a sunspot are discussed.

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Authors and Affiliations

  1. High Altitude Observatory, National Center for Atmospheric Research, Boulder, Colo., U.S.A.

    Y. Nakagawa & M. A. Raadu

  2. Department of Astro-Geophysics, University of Colorado, Boulder, Colo., U.S.A.

    D. E. Billings & D. McNamara

Authors
  1. Y. Nakagawa
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  2. M. A. Raadu
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  3. D. E. Billings
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  4. D. McNamara
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Additional information

Visiting scientist at the High Altitude Observatory.

The National Center for Atmospheric Research is sponsored by the National Science Foundation.

Sponsored by the Office of Naval Research, Contract No. N 00014-67-C-0290.

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Nakagawa, Y., Raadu, M.A., Billings, D.E. et al. On the topology of filaments and chromospheric fibrils near sunspots. Sol Phys 19, 72–85 (1971). https://doi.org/10.1007/BF00148825

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  • DOI: https://doi.org/10.1007/BF00148825

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