Physics
Scientific paper
Sep 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008epsc.conf..708m&link_type=abstract
European Planetary Science Congress 2008, Proceedings of the conference held 21-25 September, 2008 in Münster, Germany. Online a
Physics
Scientific paper
Abstract For the first time Type IV bursts at 10-30 MHz were observed at radio telescope UTR-2 in 2003-2006 years. All of them have the fine structure in the form of subbursts (fiber bursts) in emission and absorption, and zebra structures. In this paper we study properties of fiber bursts in emission on the example of four Type IV bursts happened on July, 2005. More than 800 fiber bursts were analyzed. These sub-bursts have both positive and negative frequency drift rates with values 1-3 MHz/s. These rates are a little smaller than those for usual Type III bursts at these frequencies. Their durations mainly change from 3 s to 10 s and approximately equal to the durations of Type III bursts. The most of fiber bursts have frequency band 3-12 MHz. The fluxes of these bursts are in wide ranges from some of s.f.u. to hundreds and even thousands of s.f.u. and defined by power of parent Type IV bursts. Prolonged observations at radio telescopes with high effective square are need for detailed study of fine structure of Type IV bursts.
Abranin Edward P.
Dorovskyy Vladimir
Konovalenko Aleksander
Mel'nik Valentin N.
Rucker Helmet O.
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