Physics
Scientific paper
Sep 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987soph..111..365c&link_type=abstract
Solar Physics (ISSN 0038-0938), vol. 111, no. 2, 1987, p. 365-383.
Physics
25
Electron Beams, Plasma Frequencies, Solar Flares, Solar Radio Emission, Type 2 Bursts, Electromagnetic Radiation, Shock Waves
Scientific paper
The authors report detailed observations of the herringbone (HB) fine structure on type II solar radio bursts. Data from the Culgoora radiospectrograph, radiometer and radioheliograph are analyzed. The authors determine the characteristic spectral profiles, frequency drift rates and exciter velocities, fluxes, source sizes, brightness temperatures, and polarizations of individual HB bursts. Correlations between individual bursts within the characteristic groups of bursts and the properties of the associated type II bursts are examined. The data are compatible with HB bursts being radiation at multiples of the plasma frequency generated by electron streams accelerated by the type II shock. The authors conclude that HB bursts are physically distinct phenomena from type II and type III bursts, differing significantly in emission processes and/or source conditions; this conclusion indicates that many of the presently available theoretical ideas for HB bursts are incorrect.
Cairns Iver H.
Robinson Richard D.
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