Solar Physics

, Volume 261, Issue 2, pp 281–294 | Cite as

Subsecond (0.1 s) Pulsations in the 11 April 2001 Radio Event

  • M. Karlický
  • P. Zlobec
  • H. Mészárosová


Radio pulsations observed during the 11 April 2001 event at six single frequencies (237, 327, 408, 610, 1420, and 2695 MHz) by the Trieste radio-polarimeter with a time resolution 10 ms are analyzed. A wavelet analysis method as well as time delay and polarization measurements are used. Both methods reveal pulsations with a period of about 0.1 s at all observed frequencies. Furthermore, the 0.1 s pulsations drift toward higher and lower frequencies, starting at about 1420 MHz. The polarization of pulsations increases with frequency and time. The remarkable fact that the detected 0.1 s period of pulsations does not depend on frequency in a very broad frequency range is discussed in terms of existing models of pulsations.


Sun: flares Sun: radio radiation Methods: data analysis 


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. Aschwanden, M.J.: 1987, Solar Phys. 111, 113. CrossRefADSGoogle Scholar
  2. Aschwanden, M.J.: 2002, Space Sci. Rev. 101, 1. CrossRefADSGoogle Scholar
  3. Aschwanden, M.J.: 2003, In: Erdélyi, R., Petrovay, K., Roberts, B., Awschwanden, M.J. (eds.) Proc. on Turbulence, Waves and Instabilities in the Solar Plasma, NATO Advanced Research Workshops, NATO Science Series: II: Mathematics, Physics and Chemistry, 16–20 September 2002, Budapest, Hungary 124, Kluwer Academic, Dordrecht, 215. Google Scholar
  4. Aschwanden, M.J.: 2004, Physics of the Solar Corona, Springer, Berlin. Google Scholar
  5. Bardakov, V.M., Stepanov, A.V.: 1979, Sov. Astron. Lett. 5, 247. ADSGoogle Scholar
  6. Benz, A.O.: 1986, Solar Phys. 104, 99. CrossRefADSGoogle Scholar
  7. Benz, A.O.: 1993, Plasma Astrophysics, Kluwer Academic, Dordrecht. Google Scholar
  8. Karlický, M.: 1984, Solar Phys. 92, 329. CrossRefADSGoogle Scholar
  9. Karlický, M.: 2004, Astron. Astrophys. 417, 325. CrossRefADSGoogle Scholar
  10. Karlický, M., Bárta, M.: 2007, Astron. Astrophys. 464, 735. CrossRefADSGoogle Scholar
  11. Kliem, B., Karlický, M., Benz, A.O.: 2000, Astron. Astrophys. 360, 715. ADSGoogle Scholar
  12. Ma, Y., Xie, R., Zheng, X., Huang, G.: 2003, Solar Phys. 214, 353. CrossRefADSGoogle Scholar
  13. Magdalenić, J., Zlobec, P., Messerotti, M., Vršnak, B.: 2002. In: Proc. 10th European Solar Physics Meeting, Solar Variability: From Core to Outer Frontiers SP-506, ESA, Noordwijk, 331. Google Scholar
  14. Melrose, D.B.: 1980, Plasma Astrophysics, Vol. II, Gordon and Breach, New York. Google Scholar
  15. Nakariakov, V.M., Melnikov, V.F.: 2009, Space Sci. Rev., in press. doi: 10.1007/s11214-009-9536-3.
  16. Reiner, M.J., Klein, K.-L., Karlický, M., Jiřička, K., Klassen, A., Kaiser, M.L., Bougeret, J.-L.: 2008, Solar Phys. 249, 337. CrossRefADSGoogle Scholar
  17. Roberts, B., Edwin, P.M., Benz, A.O.: 1984, Astrophys. J. 279, 857. CrossRefADSGoogle Scholar
  18. Tajima, T., Sakai, J., Nakajima, H., Kosugi, T., Brunel, F., Kundu, M.R.: 1987, Astrophys. J. 321, 1031. CrossRefADSGoogle Scholar
  19. Xie, R., Wang, M., Shi, S., Xu, Ch., Li, W., Yan, Y.: 2003, Chin. Astron. Astrophys. 27, 426. CrossRefADSGoogle Scholar
  20. Zaitsev, V.V.: 1971, Solar Phys. 20, 95. CrossRefADSGoogle Scholar

Copyright information

© Springer Science+Business Media B.V. 2010

Authors and Affiliations

  1. 1.Astronomical InstituteAcademy of Sciences of the Czech RepublicOndřejovCzech Republic
  2. 2.INAF – Trieste Astronomical ObservatoryTriesteItaly

Personalised recommendations