Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993azh....70..867a&link_type=abstract
Astronomicheskij Zhurnal, vol. 70, p. 867
Astronomy and Astrophysics
Astronomy
1
Solar Corona, Emission Spectra, Decametric Waves, Solar Radio Bursts, Solar Radiation, Harmonic Radiation
Scientific paper
Solar observations with the UTR-2 decameter-wave radio telescope antenna, performed continuously at fixed frequencies from 25 to 10 MHz during Type III, IIIb-III noise storms from 1979 to 1984, have yielded new data on the frequency drift rates Delta(f)/Delta(tf) of numerous type IIIF, IIIFb, and IIIH(b) decameter radio bursts in several narrow bands Delta(f). The data confirm that the burst drift rates are virtually independent of the phase of the 11-yr solar activity cycle. Measurements of the drift time intervals for bursts drifting over narow bands (25-20 and 12.5-10 MHZ) separated by an octave prove the reliability of the radio burst harmonic classification in which there is a clear differentiation between the emission components coinciding with the fundamental and the second harmonic of the local plasma frequency.
Abranin Eh. P.
Bazelyan L. L.
Tsybko Ya. G.
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