Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984stin...8431079l&link_type=abstract
Unknown
Astronomy and Astrophysics
Astronomy
Bandwidth, Frequencies, Harmonics, Intensity, Solar Radio Bursts, Spectra, Sun, International Sun Earth Explorer 3, Radio Astronomy, Solar Flares
Scientific paper
Three interplanetary type II radio bursts which show two prominent and long duration bands in their dynamic spectra were analyzed in detail and compared to similar bands in meter wavelength type II events. These bands, which differ by a factor of about two in frequency, were interpreted in terms of fundamental and harmonic emission. The fundamental component has a greater average intensity than the harmonic, due largely to short intense brightenings. The fundamental spectral profile is more narrow than that of the harmonic, with harmonic band typically exhibiting a larger bandwidth to frequency ratio than the fundamental by a factor of two. The fundamental has a larger source size than the harmonic, 160 degrees versus 110 degrees, on average, as viewed from the Sun. Two of the events have source positions which correlate well with the associated flare positions.
Bougeret Jean-Louis
Lengyel-Frey Denise
Stone Robert G.
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