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Seismology of sunspot atmospheres |
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| Authors: | Y D ?ug?da V Locāns J Staude |
| Institution: | 1. Institute of Terrestrial Magnetism, Ionosphere and Radio Wave Propagation (IZMIRAN) of the USSR Academy of Sciences, USSR 142092, Moscow, U.S.S.R. 2. Radioastrophysical Observatory of the Latvian Academy of Sciences, 226524, Riga, U.S.S.R. 3. Zentralinstitut für solar-terrestrische Physik, Sonnenobservatorium Einsteinturm, DDR 1500, Potsdam, G.D.R. |
| 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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