Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991baicz..42..260k&link_type=abstract
Astronomical Institutes of Czechoslovakia, Bulletin (ISSN 0004-6248), vol. 42, no. 4, July 1991, p. 260-263.
Astronomy and Astrophysics
Astronomy
2
Hot Electrons, Microwave Emission, Solar Radio Bursts, Drift Rate, Plasma Density, Radiative Heat Transfer, Radio Spectra
Scientific paper
An analytical estimate of negative frequency drift is compared to observed values of microwave radio spectra with attention given to the effects of microwave bursts. Observations of fast drift bursts (FDBs) in the range 2-4.5 GHz are examined in terms of both radiative and collisional losses, and the electron densities in the radio source are reasonable and coincide with microwave bursts. Classical collisions are sufficient to explain the negative frequency drift of FDBs, but the frequency drift of the bursts from compact radio sources can be used to estimate the plasma density in those sources.
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