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Solar Physics

, Volume 231, Issue 1–2, pp 29–44 | Cite as

Spatial Distribution and North–South Asymmetry of Coronal Bright Points from Mid-1998 to Mid-1999

  • R. BrajšaEmail author
  • H. Wöhl
  • B. Vršnak
  • V. Rušdjak
  • F. Clette
  • J.-F. Hochedez
  • G. Verbanac
  • M. Temmer
Article

Abstract

Full-disc full-resolution (FDFR) solar images obtained with the Extreme Ultraviolet Imaging Telescope (EIT) on board the Solar and Heliospheric Observatory (SOHO) were used to analyse the centre-to-limb function and latitudinal distribution of coronal bright points. The results obtained with the interactive and the automatic method, as well as for three subtypes of coronal bright points for the time period 4 June 1998 to 22 May 1999 are presented and compared. An indication of a two-component latitudinal distribution of coronal bright points was found. The central latitude of coronal bright points traced with the interactive method lies between 10 and 20. This is closer to the equator than the average latitude of sunspots in the same period. Possible implications for the interpretation of the solar differential rotation are discussed. In the appendix, possible differences between the two solar hemispheres are analysed. More coronal bright points were present in the southern solar hemisphere than in the northern one. This asymmetry is statistically significant for the interactive method and not for the automatic method. The visibility function is symmetrical around the central meridian.

Keywords

Spatial Distribution Visibility Function Automatic Method Differential Rotation Interactive Method 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. Anderson, T. W. and Finn, J. D.: 1996, The New Statistical Analysis of Data, Springer-Verlag, New York.Google Scholar
  2. Ballester, J. L., Oliver, R., and Carbonell, M.: 2005, Astron. Astrophys. 431, L5.ADSCrossRefGoogle Scholar
  3. Balthasar, H., Vázquez, M., and Wöhl, H.: 1986, Astron. Astrophys. 155, 87.ADSGoogle Scholar
  4. Benevolenskaya, E. E., Kosovichev, A. G., and Scherrer, P. H.: 2001, Astrophys. J. 554, L107.ADSCrossRefGoogle Scholar
  5. Brajša, R., Pohjolainen, S., Ruždjak, V., Teräsranta, H., Urpo, S., Vršnak, B., and Wöhl, H.: 1994, in M. Schüssler and W. Schmidt (eds.), Solar Magnetic Fields, Proceedings of International Conference held in Freiburg, Cambridge University Press, Cambridge, p. 62.Google Scholar
  6. Brajša, R., Ruždjak, V., Vršnak, B., Pohjolainen, S., Urpo, S., Scholl, A., and Wöhl, H.: 1997, Solar Phys. 171, 1.ADSGoogle Scholar
  7. Brajša, R., Ruždjak, V., Vršnak, B., Wöhl, H., Pohjolainen, S., and Urpo, S.: 1999, Solar Phys. 184, 281.ADSGoogle Scholar
  8. Brajša, R., Wöhl, H., Vršnak, B., Ruždjak, V., Clette, F., and Hochedez, J. F.: 2001, Astron. Astrophys. 374, 309.ADSGoogle Scholar
  9. Brajša, R., Wöhl, H., Vršnak, B., Ruždjak, V., Clette, F., and Hochedez, J. F.: 2002, Astron. Astrophys. 392, 329.ADSGoogle Scholar
  10. Brajša, R., Wöhl, H., Vršnak, B., Ruždjak, V., Clette, F., Hochedez, J. F., Roša, D., and Hržina, D.: 2003, Hvar Observ. Bull. 27, 13.ADSGoogle Scholar
  11. Brajša, R., Wöhl, H., Vršnak, B., Ruždjak, V., Clette, F., Hochedez, J. F., and Roša, D.: 2004, Astron. Astrophys. 414, 707.ADSGoogle Scholar
  12. Brun, A. S.: 2004, Solar Phys. 220, 333.ADSCrossRefGoogle Scholar
  13. Carbonell, M., Oliver, R., and Ballester, J. L.: 1993, Astron. Astrophys. 274, 497.ADSGoogle Scholar
  14. Delaboudinière, J. P., Artzner, G. E., Brunaud, J., Gabriel, A. H., Hochedez, J. F., Millier, F., et al.: 1995, Solar Phys. 162, 291.ADSGoogle Scholar
  15. Dezső, L.: 1964, Third Consultation on Solar Physics and Hydrodynamics, Czechosl. Acad. Sci. Astron. Inst. Pub. 51, 49.Google Scholar
  16. Feynman, R. P., Leighton, R. B., and Sands, M.: 1963, The Feynman Lectures on Physics I, vol. I, chapter 6, Addison-Wesley, Reading, MA.Google Scholar
  17. Fisk, L. A.: 1996, J. Geophys. Res. 101, 15547.ADSCrossRefGoogle Scholar
  18. Gelfreikh, G. B., Makarov, V. I., Tlatov, A. G., Riehokainen, A., and Shibasaki, K.: 2002, Astron. Astrophys. 389, 618.ADSGoogle Scholar
  19. Gissot, S. F., Hochedez, J.-F., Dibos, F., Brajša, R., Jacques, L., Berghmans, D., Zhukov, A., Clette, F., Wöhl, H., and Antoine, J.-P.: 2003, in Solar Variability as an Input to the Earth's Environment, Proceedings of ISCS 2003 Symposium, ESA SP-535, p. 853.Google Scholar
  20. Golub, L., Krieger, A. S., and Vaiana, G. S.: 1975, Solar Phys. 42, 131.ADSCrossRefGoogle Scholar
  21. Hagenaar, H. J., Schrijver, C. J., and Title, A. M.: 2003, Astrophys. J. 584, 1107.ADSCrossRefGoogle Scholar
  22. Harvey-Angle, K. L.: 1993, Magnetic Bipoles on the Sun, Ph.D. thesis, University of Utrecht, Utrecht.Google Scholar
  23. Howard, R. F.: 1991, Solar Phys. 135, 327.ADSGoogle Scholar
  24. Howard, R. and LaBonte, B. J.: 1980, Astrophys. J. 239, L33.ADSCrossRefGoogle Scholar
  25. Joshi, A.: 1995, Solar Phys. 157, 315.ADSCrossRefGoogle Scholar
  26. Joshi, B. and Pant, P.: 2005, Astron. Astrophys. 431, 359.ADSCrossRefGoogle Scholar
  27. Leftus, V.: 1960, Publ. Astron. Inst. Czechosl. 11, 31.ADSGoogle Scholar
  28. Martin, S. F. and Harvey, K. L.: 1979, Solar Phys. 64, 93.ADSGoogle Scholar
  29. Mouradian, Z. and Soru-Escaut, I.: 1994, Astron. Astrophys. 290, 279.ADSGoogle Scholar
  30. Oliver, R. and Ballester, J. L.: 1994, Solar Phys. 152, 481.ADSCrossRefGoogle Scholar
  31. Ossendrijver, M., Hoyng, P., and Schmitt, D.: 1996, Astron. Astrophys. 313, 938.ADSGoogle Scholar
  32. Ossendrijver, M.: 2003, Astron. Astrophys. Rev. 11, 287.ADSCrossRefGoogle Scholar
  33. Özgüc, A. and Ücer, C.: 1987, Solar Phys. 114, 141.ADSGoogle Scholar
  34. Pulkkinen, P. J., Brooke, J., Pelt, J., and Tuominen, I.: 1999, Astron. Astrophys. 341, L43.ADSGoogle Scholar
  35. Riehokainen, A., Urpo, S., and Valtaoja, E.: 1998, Astron. Astrophys. 333, 741.ADSGoogle Scholar
  36. Rüdiger, G. and Hollerbach, R.: 2004, The Magnetic Universe, Wiley-VCH, Weinheim, p. 95.Google Scholar
  37. Sattarov, I., Pevtsov, A. A., Hojaev, A. S., and Sherdonov, C. T.: 2002, Astrophys. J. 564, 1042.ADSCrossRefGoogle Scholar
  38. Snodgrass, H. B.: 1992, in K. L. Harvey (ed.), The Solar Cycle, Proceedings of the 12th Sacramento Peak Summer Workshop, ASP Conference Series, vol. 27, p. 71.Google Scholar
  39. Stix, M.: 2002, The Sun, Springer-Verlag, Berlin, p. 277.Google Scholar
  40. Temmer, M., Veronig, A., and Hanslmeier, A.: 2002, Astron. Astrophys. 390, 707.ADSCrossRefGoogle Scholar
  41. Temmer, M., Veronig, A., Hanslmeier, A., Otruba, W., and Messerotti, M.: 2001, Astron. Astrophys. 375, 1049.ADSCrossRefGoogle Scholar
  42. Verma, V. K.: 1993, Astrophys. J. 403, 797.ADSCrossRefGoogle Scholar
  43. Vršnak, B., Pohjolainen, S., Urpo, S., Teräsranta, H., Brajša, R., Ruždjak, V., Mouradian, Z., and Jurač, S.: 1992, Solar Phys. 137, 67.ADSGoogle Scholar
  44. Vršnak, B., Brajša, R., Wöhl, H., Ruždjak, V., Clette, F., and Hochedez, J. F.: 2003, Astron. Astrophys. 404, 1117.ADSGoogle Scholar
  45. Wang, Y.-M. and Sheeley, N. R., Jr.: 1989, Solar Phys. 124, 81.ADSCrossRefGoogle Scholar

Copyright information

© Springer Science + Business Media, Inc. 2005

Authors and Affiliations

  • R. Brajša
    • 1
    Email author
  • H. Wöhl
    • 2
  • B. Vršnak
    • 3
  • V. Rušdjak
    • 3
  • F. Clette
    • 4
  • J.-F. Hochedez
    • 4
  • G. Verbanac
    • 5
  • M. Temmer
    • 6
  1. 1.Hvar Observatory, Faculty of GeodesyUniversity of ZagrebZagrebCroatia
  2. 2.Kiepenheuer-Institut für SonnenphysikFreiburgGermany
  3. 3.Hvar Observatory, Faculty of GeodesyUniversity of ZagrebZagrebCroatia
  4. 4.Observatoire Royal de Belgique (ORB)BruxellesBelgium
  5. 5.Geophysical Institute, Faculty of ScienceUniversity of ZagrebZagrebCroatia
  6. 6.Institut für Physik, Institutsbereich GeophysikAstrophysik und MeteorologieGrazAustria

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