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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
Article

Abstract

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.

Keywords

Sun: flares Sun: radio radiation Methods: data analysis 

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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

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