Abstract
The east-west asymmetry has been analyzed using the 1946–2000 corona observation data for the green line at the Kislovodsk station. A positive east-west asymmetry has been revealed throughout the entire observation period except for three years, 1994–1996. Time variations of the east-west asymmetry for certain periods coincide with those for flares. Seasonal variations of the east-west asymmetry revealed earlier by other authors are not confirmed. If seasonal variations of the east-west asymmetry in the corona exist, their amplitudes are smaller than or comparable to the instrumental errors, errors caused by atmospheric variations during the observation period and to differences between the corona-intensity measuring systems used at different observatories.
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References
Bortzov, V.V., Makarov, V.I., and Mikhailutsa, V.P., Global Solar Cycle in the Distribution of the Green Coronal Emission Period—1940–1989, Solar Phys., 1992, vol. 137, pp. 395–400.
Cantu, A.M., Godoli, G., and Poletto, G., An Apparent Influence of the Earth on the Numbers and Areas of Sun-Spots in the Cycle 1889–1901, Solar Phys., 1970, vol. 15, pp. 356–358.
Das, T.K. and Das Gupta, M.K., Spatial Distribution of Polar Faculae in Their 22-Year Cycle, Bull. Astron. Inst. Czech., 1983, vol. 34, pp. 229–233.
Gnevyshev, M.N. and Mikhailutsa, V.P., Stability of the Photometric Observations of the Solar Corona and Variations of Its Intensity in the Solar Cycle 21, Solar Phys., 1984, vol. 90, pp. 177–184.
Letfus, V. and Ruzickova-Topolova, B., Time Variation of the E-W Asymmetry of Flare Numbers with Respect to the Phase of Solar Cycles, Bull. Astron. Inst. Czech., 1980, vol. 31, pp. 232–239.
Link, F. and Linkova, Z., Asymetries Solaires VII, Bull. Astron. Inst. Czech., 1957, vol. 8, pp. 79–88.
Makarov, V.I. and Tlatov, A.G., On a Decrease of High Latitude Corona Temperature of the Sun in the Last 50 Years, in Trudy ezhegodnoi konferentsii “Solntse v epokhu smeny znaka magnitnogo polya” (Proc. Annual Conf. “The Sun in the Epoch of the Magnetic Field Sign Reversal”), Makarov, V.I. and Obridko, V.N., Eds., St. Petersburg, 2001, pp. 259–265.
Makarova, V.V., Spatial Distribution of Polar Torches in Solar Cycle 22, Soln. Dannye, 1990, no. 8, pp. 84–87.
Maunder, A., An Apparent Influence of the Earth on the Numbers and Areas of Sun-Spots in the Cycle 1889–1901, Mon. Not. R. Astron. Soc., 1907, vol. 67, pp. 451–476.
Pajdusakova, L., The Asymmetry of Solar Corona, Contrib. Astron. Obs. Skalnate Pleso, 1966, vol. 3, pp. 6–38.
Pajdusakova-Mrkosova, L., Asymetries Solaires VIII, Bull. Astron. Inst. Czech., 1958, vol. 9, pp. 201–209.
Rybansky, M. and Tyagun, N., The Projection Effect When Solar Activity Phenomena Are Mapped in Galactic Coordinates, Pis’ma Astron. Zh., 1980, no. 6, pp. 179–181.
Rybansky, M., Coronal Index of Solar Activity. I.—Line 5303 A, Year 1971. II—Line 5303 A, Years 1972 and 1973, Bull. Astron. Inst. Czech., 1975a, vol. 26, pp. 367–374.
Rybansky, M., Coronal Index of Solar Activity. II. Line 5303 A, Years 1972 and 1973, Bull. Atron. Inst. Czech., 1975b, vol. 26, pp. 374–377.
Rybansky, M., Coronal Index of Solar Activity. III—Years 1971–1976, Bull. Astron. Inst. Czech., 1979, vol. 30, pp. 104–113.
Shpital’naya, A.A., On the Possible Nature of the Annual Variation in Solar Flare Activity, Soln. Dannye, 1979a, no. 12, pp. 98–104.
Shpital’naya, A.A., Relation between the Annual Variation in Solar Activity and Galactic Factors I, Soln. Dannye, 1979b, no. 8, pp. 94–102.
Svestka, Z., On Long-Term Forecasts of Proton Flares, Solar Phys., 1968, vol. 4, pp. 18–29.
Temmer, M., Veroning, A., Hanslmeier, H., et al., Time Variation of the E-W Asymmetry of Flare Numbers with Respect to the Phase of Solar Cycles, Astron. Astrophys., 2001, vol. 375, pp. 1049–1061.
Tlatov, A.G., Guseva, S.A., and Kim Gunn-Der, Comparative Analysis of Spectral Corona Observations at Kislovodsk Stations in 1957–2000, in Trudy ezhegodnoi konferentsii “Solntse v epokhu smeny znaka magnitnogo polya” (Proc. Annual Conf. “The Sun in the Epoch of the Magnetic Field Sign Reversal”), Makarov, V.I. and Obridko, V.N., Eds., St. Petersburg, 2001, pp. 385–390.
Trellis, M., Dissymetrie Est-Quest des Intensites de la Couronne Monochromatique, Comp. Rend., 1960, vol. 250, pp. 58–60.
Tritakis, V., Mavromichalaki, H., Paliatsos, A., et al., Possible East Side Predominance of the Optical Emissions of the Solar Corona, New Astron. 2. Internet Electron. J., A&A, 1997, pp. 437–447.
Tritakis, V., Noens, J., and Palitsos, A., Various Errors Which Could Introduce Asymmetric East-West Intensity Observations of the Solar Corona, Solar Phys., 1995, vol. 156, pp. 229–243.
Tyagun, N. and Khmyrov, G., Character of the East-West Asymmetry in the Monochromatic Corona, in Trudy XIII kons. soveshch. po fizike solntsa (pamyati V.E. Stepanova) “Solnechnye magnitnye polya i korona” (Proc. 13 Cons. Meeting on Solar Physics (in Memory of V.E. Stepanov) “Solar Magnetic Fields and Corona”), 1988, vol. 1, pp. 278–281.
Tyagun, N. and Rybanskii, M.E., E-W Asymmetry in the Monochromatic Corona, Rhus. Solariterr. Rotsdam, 1981, no. 17, pp. 19–24.
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Original Russian Text © N.F. Tyagun, 2009, published in Solnechno-Zemnaya Fizika, 2009, Vol. 14, pp. 14–18.
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Tyagun, N.F. On the existence of the east-west asymmetry in the optical observations of the solar corona. Geomagn. Aeron. 50, 848–853 (2010). https://doi.org/10.1134/S0016793210070030
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DOI: https://doi.org/10.1134/S0016793210070030