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OATS-DAUT SEMINAR
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Speaker: Jasmina Magdalenic (Zagreb University, HR)

Title: Characteristics of newly discovered super-short solar radio-bursts

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Abstract: For more than 40 years solar radio spikes in the decimeter wavelength range were considered to be the bursts of the shortest duration and the narrowest spectral width among all types of solar radio emission (Benz 1989, Fleishman & Melnikov 1998). Using single frequency data with high time resolution (1ms) (recorded at the Trieste Astronomical Observatory), I have found solar radio bursts that are 2 - 10 times shorter than spikes. Solar origin of this newly found super-short structures (SSSs) is confirmed by one-to-one identification of individual SSSs in Trieste single frequency data and in the fast dynamical spectra recorded by the Artemis-IV (new instrument of the Athens University). The analysis reveals a number of different morphological categories that are classified as: simple broad-band, simple narrow-band, and complex SSSs. Characteristics of SSSs constituting a particular zebra pattern in two events related to flares in the same active region will be also presented.
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