Electron beams in the low corona

Details Electron beams in the low corona Electron beams in the low corona

Oct 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992soph..141..335b&link_type=abstract

Solar Physics (ISSN 0038-0938), vol. 141, no. 2, p. 335-346.

Astronomy and Astrophysics

Astronomy

61

Electron Beams, Plasma Frequencies, Radio Astronomy, Solar Corona, Type 3 Bursts, Circular Polarization, Electrostatic Waves, High Resolution, Solar Spectra

Scientific paper

Selected high-resolution spectrograms of solar fast-drift bursts in the 6.2-8.4 GHz range are presented. The bursts have similar characteristics as metric and decimetric type III bursts: rise and decay in a few thermal collision times, total bandwidth not less than 3 percent of the center frequency, low polarization, drift rate of the order of the center frequency per second, and flare association. They appear in several groups per flare, each group consisting of some tens of single bursts. Fragmentation is also apparent in frequency; there are many narrowband bursts randomly scattered in the spectrum. The maximum frequency of the bursts is high variable. The radiation is intepreted in terms of plasma emission of electron beams at plasma densities of more than 10 exp 11/cu cm.

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