Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982a%26a...112..377s&link_type=abstract
Astronomy and Astrophysics, vol. 112, no. 2, Aug. 1982, p. 377-385.
Astronomy and Astrophysics
Astrophysics
68
Cyclotron Radiation, Masers, Plasma Radiation, Solar Electrons, Solar Flares, Solar Radio Bursts, Coronal Loops, Damping, Electron Cyclotron Heating, Solar Magnetic Field
Scientific paper
Electron cyclotron maser instability has been suggested as the cause of the observed short (10-20 msec), intense (an approximate brightness temperature of 10 to the 15th K) and up to 100% polarized microwave solar emission. It is shown that plasma effects and thermal cyclotron damping, ignored in previous theories, play an important role in controlling the frequency range of the emission. The radio emission is suppressed for ratios of the plasma frequency to the cyclotron frequency smaller than 0.4. An examination of the cyclotron damping, reveals that the maser action is suppressed unless a large fraction (i.e., over 10%) of the accelerated electrons participates in the emission process.
Papadopoulos Konstantinos
Sharma Rishi
Vlahos Loukas
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