On the 22-Year Oscillations, I

Details On the 22-Year Oscillations, I On the 22-Year Oscillations, I

Feb 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996soph..163..249v&link_type=abstract

Solar Physics, Volume 163, Issue 2, pp.249-258

Physics

1

Scientific paper

Observational data of the solar diameter in Italy during 1876 1937 and in Greenwich during 1851 1937 were analyzed. The Whittaker operator with different smoothing coefficients was used. The average data sets for the analysis of the possible oscillations of the solar diameter during 1876 1937 were obtained. Average values of the solar radius R(t) and absolute values of its time derivative ¦dR(t)/dt¦ were compared with the Wolf number, W(t), and with the integral A(t) = ∫{0/t} W(t)dt + constant. A good correlation r(R', W) = <¦dR(t)/dt¦, W(t)> and r(R, A) = was found. It was shown that the frequency spectra of R(t) and A(t) are similar. It was found that during odd 11-yr cycles, the solar diameter decreases, whereas during even cycles it increases. A hysteresis-like behavior in the variation of R(t) during the 22-yr solar magnetic cycle was demonstrated.

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