Solar Physics

, Volume 269, Issue 1, pp 129–140 | Cite as

Solar Activity Cycle in Solar-wind Sources and Flows

  • N. A. Lotova
  • K. V. Vladimirskii
  • V. N. Obridko
Article

Abstract

Experiments based on multi-source radio occultation measurements of the circumsolar plasma at R∼4.0−70RS were carried out during 1997 – 2008 to locate the inner boundary of the solar-wind transonic transition region, Rin. The data obtained were used to correlate the solar-wind stream structure and magnetic fields on the source surface (R=2.5RS) in the solar corona. The method of the investigation is based on the analysis of the dependence Rin=F(|BR|) in the correlation diagrams, where Rin is the inner boundary of the solar-wind transition region and |BR| is the intensity of the magnetic field at the source surface. On such diagrams, the solar wind is resolved into discrete branches, streams of different types. The analysis of the stream types using a continuous series of data from 1997 to 2008 allowed us to propose a physical criterion for delimiting the epochs in the current activity cycle.

Keywords

Solar cycle Solar magnetic fields Solar wind 

References

  1. Bumba, V., Kleczek, J. (eds.): 1976, In: Basic Mechanisms of Solar Activity, Proc. IAU Symp. 71, Reidel, Dordrecht. Russian translation: Obridko, V.N. (ed.): 1979, Problemy solnechnoi aktivnosti, Mir, Moscow. Google Scholar
  2. Cohen, M.: 1969, Annu. Rev. Astron. Astrophys. 7, 619. CrossRefADSGoogle Scholar
  3. Dmitriev, A.V., Suvorova, A.V., Veselovsky, I.S.: 2009, In: Johannson, H.E. (ed.) Handbook on Solar Wind: Effects, Dynamics and Interactions, Nova Science Publishers, Hauppauge, p. 81. Google Scholar
  4. Efimov, A.I., Samoznaev, L.N., Bird, M.K., Chashei, I.V., Plettemeier, D.: 2008, Adv. Space Res. 42, 117. CrossRefADSGoogle Scholar
  5. Hewish, A.: 1971, Astrophys. J. 163, 645. CrossRefADSGoogle Scholar
  6. Hoeksema, J.T., Wilcox, J.M., Scherer, P.H.: 1982, J. Geophys. Res. 87, 10331. CrossRefADSGoogle Scholar
  7. Ishkov, V.N.: 2001, Zemlya i Vselennaya (Earth Universe) 2, 3 (in Russian). Google Scholar
  8. Lotova, N.A.: 1992, In: Marsch, E., Schwenn, R. (eds.) Solar Wind Seven, COSPAR Colloq. Ser. 3, Oxford, Pergamon, 217. Google Scholar
  9. Lotova, N.A., Blums, D.F., Vladimirskii, K.V.: 1985, Astron. Astrophys. 150, 266. ADSGoogle Scholar
  10. Lotova, N.A., Korelov, O.A.: 1992, In: Marsch, E., Schwenn, R. (eds.) Solar Wind Seven, COSPAR Colloq. Ser. 3, Oxford, Pergamon, 221. Google Scholar
  11. Lotova, N.A., Obridko, V.N., Vladimirskii, K.V., Bird, M.K., Janardhan, P.: 2002, Solar Phys. 205, 149. CrossRefADSGoogle Scholar
  12. Lotova, N.A., Vladimirskii, K.V., Yurovskaya, I.Y., Korelov, O.A.: 1995, Russ. Astron. J. 72, 757. ADSGoogle Scholar
  13. Lotova, N.A., Vladimirskii, K.V., Korelov, O.A.: 1997, Solar Phys. 172, 225. CrossRefADSGoogle Scholar
  14. Lotova, N.A., Vladimirskii, K.V., Obridko, V.N., Subaev, I.A.: 2004, Astron. Lett. 30, 387. CrossRefGoogle Scholar
  15. Manoharan, P.K.: 2010, Solar and Stellar Variability: Impact on Earth and Planets, Proc. IAU Symp. 264, 356. Google Scholar
  16. Obridko, V.N., Shelting, B.D.: 1992, Solar Phys. 137, 167. CrossRefADSGoogle Scholar
  17. Prokhorov, A.M., Bunkin, F.V., Gochelashvili, K.S., Shishov, V.I.: 1974, Usp. Fiz. Nauk 114(3), 415. CrossRefGoogle Scholar
  18. Prokhorov, A.M., Bunkin, F.V., Gochelashvili, K.S., Shishov, V.I.: 1975, Proc. IEEE 63, 790. CrossRefADSGoogle Scholar
  19. Salpeter, E.E.: 1967, Astrophys. J. 147, 433. CrossRefADSGoogle Scholar
  20. Schwenn, R.: 1990, In: Schwenn, R., Marsch, E. (eds.) Physics of the Inner Heliosphere, 1, Springer, New York, 99. Google Scholar
  21. Veselovsky, I.S.: 2009a, Space Res. Today. 174, 67. CrossRefGoogle Scholar
  22. Veselovsky, I.S.: 2009b, Geomagn. Aeron. 49(8), 1148. CrossRefADSGoogle Scholar
  23. Vitinsky, Yu.I., Kopecky, M., Kuklin, G.V.: 1986, Statistics of Sunspot Generation Activity in the Sun, Nauka, Moscow. Google Scholar
  24. Vitkevich, V.V.: 1951, Sov. Phys. (Dokl. RAN) 77(4), 585. Google Scholar
  25. Vitkevich, V.V.: 1955, Astron. Zh. 32(2), 106. Google Scholar

Copyright information

© Springer Science+Business Media B.V. 2010

Authors and Affiliations

  • N. A. Lotova
    • 1
  • K. V. Vladimirskii
    • 2
  • V. N. Obridko
    • 1
  1. 1.Pushkov Institute of Terrestrial Magnetism, Ionosphere, and Radio-wave Propagation RASTroitskRussia
  2. 2.Lebedev Physical Institute RASMoscowRussia

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