Abstract
We have analyzed the daily record of sunspot areas during the current cycle 22 looking for the short-term periodicity of around 155 days which was present during some previous solar cycles. Two different methods have been used to compute the power spectra and the results indicate that such periodicity has been absent during the current solar cycle, which confirms the results obtained by other authors who used flares or flare-related data.
However, we have found that, during some intervals of time, a periodicity close to 86 days is statistically significant. A similar periodicity was found by Landscheit (1986) in energetic X-ray flares, between 1970 and 1982 (second and first half of solar cycles 20 and 21, respectively), and by Bai (1992b) for important solar flares during solar cycle 20.
Similar content being viewed by others
References
Bai, T.: 1987a,Astrophys. J. 318, L85.
Bai, T.: 1987b,Astrophys. J. 314, 795.
Bai, T.: 1988,Astrophys. J. 328, 860.
Bai, T.: 1992a,Astrophys. J. 388, L69.
Bai, T.: 1992b,Astrophys. J. 397, 584.
Bai, T. and Cliver, E. W.: 1990,Astrophys. J. 363, 299.
Bai, T. and Sturrock, P: 1987,Nature 327, 601.
Bai, T. and Sturrock, P.: 1991,Nature 350, 141.
Bai, T. and Sturrock, P: 1993,Astrophys. J. 409, 486.
Bloomfield, P.: 1976,Fourier Analysis of Time Series: An Introduction, J. Wiley and Sons, New York.
Bogart, R. S. and Bai, T.: 1985,Astrophys J. 299, L51.
Burg, J. P.: 1967,Proc. 37th Ann. Int. Soc. Explor. Geophys., Oklahoma.
Carbonell, M. and Ballester, J. L.: 1990,Astron. Astrophys. 238, 377.
Carbonell, M. and Ballester, J. L.: 1991,Astron. Astrophys. 49, 295.
Carbonell, M. and Ballester, J. L.: 1992,Astron. Astrophys. 255, 350.
Chatfield, C.: 1984,The Analysis of Time Series, Chapman and Hall, London.
De Jager, O. C.: 1987, Ph.D. Thesis, Potchefstroom University.
Delache, Ph.: 1988,Adv. Space Res. 8(7), 119.
Delache, Ph., Laclare, F., and Sadsoud, H.: 1985,Nature 317, 416.
Delache, Ph., Laclare, F., and Sadsoud, H.: 1988, in J. Christensen-Dalsgaard and S. Frandsen (eds.),Advances in Helio- and Asteroseismology, Kluwer Academic Publishers, Dordrecht, Holland.
Dröge, W., Gibbs, K., Grunsfeld, J. M., Meyer, P., Newport, B. J., Evenson, P., and Moses, D.: 1990,Astrophys. J. Supll. Ser. 73, 279.
Ferraz-Mello, S.: 1981,Astron. J. 86, 619.
Gabriel, S., Evans, R., and Feynman, J.: 1990,Solar Phys. 128, 415
Horne, J. H. and Baliunas, S. L.: 1986,Astrophys. J. 302, 757.
Ichimoto, K., Kubota, J., Suzuki, M., Tohmura, I., and Kurokawa, H.: 1985,Nature 316, 422.
Kile, J. N. and Cliver, E. W.: 1991,Astrophys. J. 370, 442.
Kiplinger, A. L., Dennis, B. R., and Orwig, L. E.: 1985,Bull. Amer. Am. Soc. 16, 891.
Landscheit, T.: 1986,Solar Phys. 107, 195.
Lean, J.: 1990,Astrophys. J. 363, 718.
Lean, J. and Brueckner, G. E.: 1989,Astrophys. J. 337, 568.
Lomb, N.: 1976,Astrophys. Space Sci. 39, 447.
McIntosh, P. S., Thompson, R. J., and Willock, E. C.: 1992,Nature 360, 322.
Özgüç, A. and Ätaç, T.: 1989,Solar Phys. 123, 357.
Özgüç, A. and Ätaç, T.: 1994,Solar Phys. 150, 339.
Press, W. H. and Teukolsky, S. A.: 1988,Computers in Phys. 2, 77.
Press, W. H., Flannery, B. P., Teukolsky, S. A., and Vetterling, W. T.: 1986,Numerical Recipes, Cambridge University Press, Cambridge
Ribes, E., Merlin, Ph., Ribes, J. C., and Barthalot, R.: 1989,Ann. Geophys. 7, 321.
Rieger, E., Share, G. H., Forrest, D. J., Kanbach, G., Reppin, C., and Chupp, E. L.: 1984,Nature 312, 623.
Scargle, J. D.: 1982,Astrophys. J. 263, 385.
Silverman, S. M.: 1990,Nature 347, 365.
Sturrock, P. and Bai, T.: 1992,Astrophys. J. 397, 337.
Van den Boss, A.: 1971,IEEE Trans. Inf. Theory IT 17, 493.
Wolff, C. L.: 1983,Astrophys. J. 264, 667.
Wolff, C. L.: 1992,Solar Phys. 142, 187.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Oliver, R., Ballester, J.L. Short-term periodicities in sunspot areas during solar cycle 22. Sol Phys 156, 145–155 (1995). https://doi.org/10.1007/BF00669581
Received:
Revised:
Issue Date:
DOI: https://doi.org/10.1007/BF00669581