Separation of solar radio bursts in a complex spectrum

Details Separation of solar radio bursts in a complex spectrum Separation of solar radio bursts in a complex spectrum

Jun 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011iaus..274..150m&link_type=abstract

Advances in Plasma Astrophysics, Proceedings of the International Astronomical Union, IAU Symposium, Volume 274, p. 150-152

Astronomy and Astrophysics

Astrophysics

Sun: Corona, Sun: Flares, Sun: Radio Radiation, Sun: Oscillations

Scientific paper

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-1). 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.

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