Solar Physics

, Volume 215, Issue 1, pp 99–109 | Cite as

On the Latitudinal Distribution of Sunspot Groups over a Solar Cycle

  • K.J. Li
  • J.X. Wang
  • L.S. Zhan
  • H.S. Yun
  • H.F. Liang
  • H.J. Zhao
  • X.M. Gu
Article

Abstract

The latitudinal distribution of sunspot groups over a solar cycle is investigated. Although individual sunspot groups of a solar cycle emerge randomly at any middle and low latitude, the whole latitudinal distribution of sunspot groups of the cycle is not stochastic and, in fact, can be represented by a probability density function of the Γ distribution having maximum probability at about 15.5°. The maximum amplitude of a solar cycle is found to be positively correlated against the number of sunspot groups at high latitude (≥35°) over the cycle, as well as the mean latitude. Also, the relation between the asymmetry of sunspot groups and its latitude is investigated, and a pattern of the N-S asymmetry in solar activity is suggested.

Keywords

Density Function Probability Density Probability Density Function High Latitude Solar Activity 

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References

  1. Babcock, H. W.: 1961, Astrophys. J. 133, 572.Google Scholar
  2. Carrington, R. C.: 1858, Monthly Notices Royal Astron. Soc. 19, 1.Google Scholar
  3. Hale, G. E. and Nicholson S. B.: 1938, Publ. Carnegie Inst. 498.Google Scholar
  4. Harvey, K. L. and White, O. R.: 1999, J. Geophys. Res. 104, 19759.Google Scholar
  5. Hathaway, D. H., Wilson, R. M., and Reichman, E. J.: 1994, Solar Phys. 151, 177.Google Scholar
  6. Hoyt, D. V. and Schatten, K. H.: 1998a, Solar Phys. 179, 189.Google Scholar
  7. Hoyt, D. V. and Schatten, K. H.: 1998b, Solar Phys. 181, 491.Google Scholar
  8. Kiepenheuer, K. O.: 1953, in G. P. Kuiper (ed.), The Sun, University of Chicago Press, Chicago, p. 322.Google Scholar
  9. Li, K. J.: 1999, Astron. Astrophys. 354, 1006.Google Scholar
  10. Li, K. J. and Gu, X. M.: 2000, Astron. Astrophys. 353, 396.Google Scholar
  11. Li, K. J., Yun, H. S., and Gu, X. M.: 2001a, Astrophys. J. 554, L115.Google Scholar
  12. Li, K. J., Yun, H. S., and Gu, X. M.: 2001b, Astron. Astrophys. 368, 285.Google Scholar
  13. Maunder, E. W.: 1913, Monthly Notices Royal Astron. Soc. 74, 112.Google Scholar
  14. Maunder, E. W.: 1922, Monthly Notices Royal Astron. Soc. 82, 534.Google Scholar
  15. Oliver, R. and Ballester, J. L.: 1994, Solar Phys. 152, 481.Google Scholar
  16. Pulkkinen, P. J., Brooke, J., Pelt, J., and Tuominen, I.: 1999, Astron. Astrophys. 341, L43.Google Scholar
  17. Schrijver, C. J. and Zwaan, C.: 2000, Solar and Stellar Magnetic Activity, Cambridge University Press, Cambridge, p. 139.Google Scholar
  18. Schwabe, H.: 1843, Astron. Nachr. 21, 233.Google Scholar
  19. Spencer, J. H.: 1955, Sunspot and Geomagnetic-storm Data Derived from Greenwich Observations 1874-1954, Her Majesty's Stationery Office, London.Google Scholar
  20. Vizoso, G. and Ballester, J. L.: 1990, Astron. Astrophys. 229, 540.Google Scholar
  21. Waldmeier, M.: 1935, Astron. Mott. Zürich 14, 105.Google Scholar
  22. Wilson, R. M.: 1987, Solar Phys. 111, 279.Google Scholar
  23. Wilson, R. M., Hathaway, D. H., and Reichmann, E.: 1996, J. Geophys. Res. 101, 19967.Google Scholar
  24. Wilson, R. M., Hathaway, D. H., and Reichmann, E.: 1998, J. Geophys. Res. 103, 17411.Google Scholar
  25. Wolf, R.: 1859, Vierteljahrschr. Naturforsch. Gesellsch., Zürich, 2.Google Scholar
  26. Yallop, B. D. and Hohenkerk, C. Y.: 1980, Solar Phys. 68, 303.Google Scholar

Copyright information

© Kluwer Academic Publishers 2003

Authors and Affiliations

  • K.J. Li
    • 1
  • J.X. Wang
    • 2
  • L.S. Zhan
    • 1
  • H.S. Yun
    • 3
  • H.F. Liang
    • 1
  • H.J. Zhao
    • 1
  • X.M. Gu
    • 1
    • 4
  1. 1.National Astronomical Observatories/Yunnan Observatory, CASKunmingChina
  2. 2.National Astronomical Observatories, CASChina
  3. 3.Astronomy ProgramSEES, Seoul National UniversitySeoulKorea
  4. 4.United Laboratory of Optical Astronomy, CASChina

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