Separation of solar radio bursts in a complex spectrum

0360457 - ASÚ 2012 RIV GB eng C - Conference Paper (international conference)
Mészárosová, Hana - Rybák, J. - Karlický, Marian - Jiřička, Karel
Separation of solar radio bursts in a complex spectrum.
Advances in Plasma Astrophysics. Cambridge: Cambridge University Press, 2011 - (Bonanno, A.), s. 150-152. IAU Symposium Proceedings Series, IAU S274. ISBN 9780521197410. ISSN 1743-9213.
[Symposium of the International Astronomical Union /274./. Giardini Naxos (IT), 06.09.2010-10.09.2010]
R&D Projects: GA AV ČR(CZ) IAA300030701
Institutional research plan: CEZ:AV0Z10030501
Keywords : Sun * flares * radio radiation
Subject RIV: BN - Astronomy, Celestial Mechanics, Astrophysics

Radio spectra, observed during solar flares, are usually very complex (many bursts and fine structures). We have developed a new method to separate them into individual bursts and analyze them separately. The method is used in the analysis of the 0.8–2.0 GHz radio spectrum of the April 11, 2001 event, which was rich in drifting pulsating structures (DPSs). Using this method we showed that the complex radio spectrum consists of at least four DPSs separated with respect to their different frequency drifts (-115, -36, -23, and -11 MHz/s). These DPSs indicate a presence of at least four plasmoids expected to be formed in a flaring current sheet. These plasmoids produce the radio emission on close frequencies giving thus a mixture of superimposed DPSs observed in the radio spectrum.
Permanent Link: http://hdl.handle.net/11104/0198008