Oscillations of the Sun: Results of observations in 1974–2007 |
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| Authors: | V A Kotov V I Haneychuk |
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| Institution: | (1) Crimean Astrophysical Observatory, pos. Nauchnyi, 98409 Crimea, Ukraine |
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| Abstract: | Doppler measurements of the photosphere of the entire Sun carried out at the Crimean Astrophysical Observatory (CrAO) in 1974–2007 by the differential technique showed the presence of an enigmatic periodicity of P 1 = 159.967(4) min. The phase of this oscillation was constant over the entire 34-year of surveys and interval. The true nature of this phenomenon is unknown. Pulsation with the former period P 0 = 160.0101(15) min has been reliably detected only in the first nine years, from 1974 to 1982. It is noted that (a) the average amplitude of the P 1 oscillation in the first half of the data was nearly 34% higher than in the second half and (b) the beat period of 400(14) d of these two pulsations is equal within error to the Jovian synodic period (399 d). A hypothesis is discussed relating the P 1 oscillation to the superfast rotation of the inner solar core. |
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| Keywords: | Sun photosphere pulsations Jovian synodic period |
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