Abstract
Two sequences of OSO-4 spectroheliograms in Mg x and Si xii obtained during October–November 1967 and covering the intervals of 83 and 22 hr, respectively, have been analyzed to reveal quasi-periodic oscillations of EUV flux from solar sources with a periodicity of 5–14 hr. The oscillation periods of the emission flux from local sources over sunspots and magnetic field enhancements in plages without spots have been investigated in correlation with characteristics of the respective AR and plages. The greatest periods (> 8 hr) are shown to be peculiar of small sunspots or sunspot groups at the initial or final stage of their development, whereas the smallest periods (∼ 5–6 hr) are observed in the case of large well-developed groups at the maximum stage of development. In quiet regions on the Sun and plages without spots, the oscillation periods are ∼ 6–8 hr. The surface areas in which the oscillations are synchronous and coincide in phase have typical dimensions of ≲1′ in quiet and 1 to 5′ in active regions. These areas form a spatial structure similar to the chromospheric network and supergranules. The characteristic lifetime of the structure elements is ∼ 1.5–2 days.
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Athay, R. G. and White, D. R.: 1980, Astrophys. J. 240, 306.
Blackman, P. B. and Tukey, J.W.: 1958, The Measurement of Power Spectra.
Bogod, V. M.: 1978, Soobshcheniya SAO 23, 22.
Bonnet, R. M.: 1981, Space Sci. Rev. 29, 131.
Bumba, V. and Howard, R.: 1965, Astrophys. J. 141, 1492.
Bumba, V., Suda, J., and Ranzinger, P.: 1973, Bull. Astron. Inst. Czech. 24, 22.
Bruckner, G. E. and Bartol, J. D. F.: 1974, Solar Phys. 38, 139.
Cheng, Ch. Ch.: 1980a, Astrophys. J. 238, 743.
Cheng, Ch. Ch.: 1980b, Solar Phys. 67, 259.
Foukal, P. V.: 1978, Astrophys. J. 223, 1046.
Foukal, P. V., Huber, M. C. E., Noyes, R. W., Reeves, E. M., Schmahl, E. J., Timothy, J. G., Vernazza, J. E., and Withbroe, G. L.: 1974, Astrophys. J. Letters 193, L143.
Gelfreikh, G. B. et al.: 1977, Pisma v Astron. Zh. 3, 550.
Gelfreikh, G. B., Bogod, V. M., Korzhavin, A. N., Kononovich, E. V., Smirnova, O. B., Startsev, S. V., and Piotrovich, V. V.: 1982, in W. Fricke and G. Teleki (eds.), Sun and Planetary System, D. Reidel Publ. Co., Dordrecht, Holland, p. 109.
Golub, L., Krieger, A. S., Silk, J. K., Timothy, A. F., and Vaiana, G. S.: 1974, Astrophys. J. Letters 189, L93.
Gopasyuk, S. I. and Kartasheva, L. G.: 1970, Izv. Krymsk. Astrofiz. Obs. 41–42, 59.
Grigoryev, V. M. and Ermakova, L. V.: 1976, in Appearance and Evolution of Active Regions on the Sun, Trudy VIII Konsultativnogo Soveshchaniya Akademiy Nauk Sotsialisticheskih Stran po Fizike Solntsa, Nauka, p. 54.
Hart, A. B.: 1956, Monthly Notices Roy. Astron. Soc. 116, 38.
Howard, R. and Švestka, Z.: 1977, Solar Phys. 54, 65.
Howard, R. and LaBonte, B. J.: 1980, Astrophys. J. 239, 738.
Ivanov, E. V.: 1980, in Solar-Terrestrial Prediction Proceedings, Vol. 3, Solar Activity Predictions, Washington, D.C., p. 189.
Ivanchuk, V. I.: 1968, Soln. Dann., No. 4, p. 63.
Kubicela, A.: 1976, in Appearance and Evolution of Active Regions on the Sun, Trudy VIII Konsultativnogo Soveshchaniya Akademiy Nauk Sotsialisticheskih Stran po Fizike Solntsa, Nauka, p. 15.
Leighton, R. B. and Noyes, R. W.: 1962, Astrophys. J. 135, 474.
McIntosh, P. S.: 1981, in The Physics of Sunspots, Proceedings of Sacramento Peak Observatory Conference, Sacr. Peak Obs., Sunspots, New Mexico, p. 7.
Melioransky, A. S., Pankov, V. M., Nazarova, N. I., Savenko, I. A., and Fursov, Yu. S.: 1976a, Space Research XVI, 823.
Melioransky, A. S., Nazarova, N. I., Pankov, B.M., and Savenko, I. A.: 1976b, in Vneatmosfernie Issledovaniya Aktivnikh Oblastey na Solntse, Trudy VIII Konsultativnogo Soveshchaniya Akademiy Nauk Sotsialisticheskih Stran po Fizike Solntsa, Nauka, p. 29.
Nakagawa, Y. and Malwill McKim, J.: 1969, Solar Phys. 9, 102.
Noyes, R. W., Withbroe, G. L., and Kirshner, R. T.: 1970, Solar Phys. 11, 388.
Pallavicini, R., Peres, G., Serio, R., and Vaiana, G. B.: 1981; Astrophys. J. 247, 692.
Ploceniak, S. and Rompolt, B.: 1972, Solar Phys. 29, 399.
Reeves, E. M. and Parkinson, W. H.: 1970, Astrophys. J. Suppl. 181, 21.
Reeves, E. M. and Parkinson, W. H.: 1972, Solar Phys. 24, 113.
Reeves, E. M. et al.: 1974, Astrophys. J. Letters 188, 2, L27.
Rogers, E. H.: 1970, Solar Phys. 13, 57.
Shilova, N. S. et al.: 1981, in Solar Maximum Year, Proceedings of Intern. Workshop, Simferopol, March 1981, Vol. 2, p. 180.
Simon, G. W. and Noyes, R. W.: 1971, in R. Howard (ed.), ‘Solar Magnetic Fields’, IAU Symp. 43, 663.
Solar Phenomena: 1967, Monthly Bulletin No. 119, Osservatorio Astronomico di Roma.
Solar Geophysical Data: 1968, No. 281, US Dept. of Commerce, ESSA, Boulder, Colorado.
Sýkora, J.: 1968, Bull. Astron. Inst. Czech. 19, 37.
Tousey, R., Bartoe, J. D. F., Bohlin, J. D., Brueckner, G. E., Purcell, J. D., Scherrer, V. E., Sheeley N. R.Jr., Schumacher, R. J., van Hoosier, M. E.: 1973, Solar Phys. 33, 265.
Vaiana, G. S. and Rosner, R.: 1978, Ann. Rev. Astron. Astrophys. 26, 393.
Wolfson, C. J., Acton, L. W., Leibacher, J. W., and Roething, D. T.: 1977, Solar Phys. 55, 181.
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Ivanov, E.V. Long-term quasi-periodic oscillations of EUV-flux on the Sun. Sol Phys 89, 261–273 (1983). https://doi.org/10.1007/BF00217250
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DOI: https://doi.org/10.1007/BF00217250