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Seismology of sunspot atmospheres

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Abstract

The present work deals with the theory of oscillations with periods of about 3 min observed in the chromosphere above sunspot umbrae. The model of these oscillations (slow mode magneto-acoustic waves trapped in a chromospheric resonant cavity) provides an independent method of checking empirical models of the chromosphere above sunspots.

Making use of this method, we investigate sunspot models which have been derived from spectroscopic data; the calculated periods of the oscillations fit well the observed periods.

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Authors and Affiliations

  1. Institute of Terrestrial Magnetism, Ionosphere and Radio Wave Propagation (IZMIRAN) of the USSR Academy of Sciences, USSR 142092, Moscow, U.S.S.R.

    Y. D. Žugžda

  2. Radioastrophysical Observatory of the Latvian Academy of Sciences, 226524, Riga, U.S.S.R.

    V. Locāns

  3. Zentralinstitut für solar-terrestrische Physik, Sonnenobservatorium Einsteinturm, DDR 1500, Potsdam, G.D.R.

    J. Staude

Authors
  1. Y. D. Žugžda
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  2. V. Locāns
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  3. J. Staude
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Additional information

Proceedings of the 66th IAU Colloquium: Problems in Solar and Stellar Oscillations, held at the Crimean Astrophysical Observatory, U.S.S.R., 1–5 September, 1981.

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Žugžda, Y.D., Locāns, V. & Staude, J. Seismology of sunspot atmospheres. Sol Phys 82, 369–378 (1983). https://doi.org/10.1007/BF00145575

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