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Cyclotron radio emission in plasma with steep temperature gradient

โœ Scribed by M. Siarkowski

Book ID
104646053
Publisher
Springer
Year
1984
Tongue
English
Weight
464 KB
Volume
94
Category
Article
ISSN
0038-0938

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โœฆ Synopsis

In the paper it is investigated how the non-Maxwellian electron velocity distribution function associated with steep temperature gradient affects the cyclotron radio emission at centimeter wavelengths. The results obtained were used to calculate the distribution of the brightness temperature across a sunspot. The presence of the large electron temperature gradient in the transition region may lead to a significant increase of the observed brightness temperature (up to several tens of percent) in comparison with the brightness temperature obtained by assumption of the Maxwellian distribution function.

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Very bright and highly circularly polarized radio bursts from the Sun, the planets, flare stars, and close binary stars are attributed to the electron-cyclotron maser instability. The mode and frequency of the dominant radiation from the maser instability is shown to be dependent on the plasma tempe