Analysis of Radio Emission Mechanisms Generating Preferentially the Ordinary Mode of Electromagnetic Waves
Abstract
Three radio emission mechanisms (radiation on the first and second harmonic of the plasma frequency, and the resonant transition radiation), which can preferentially generate electromagnetic waves of the o-mode, are analysed. For the case of the transition radiation various causes of density fluctuations (thermal, Langmuir and ion-sound waves) are considered. It was found that the radiation on the frequency of the upper-hybrid waves is always of the o-mode type. Radio emission on the second harmonic of the upper-hybrid frequency can also be polarized in the o-mode type, but this case is less probable than the previous one. In the transition radiation the preference of the o-mode type is also possible, but the small-scale turbulence in the radio source is necessary. The most probable case is the resonant transition radiation generated at density fluctuations produced by ion-sound waves.
- Publication:
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Hvar Observatory Bulletin
- Pub Date:
- 2005
- Bibcode:
- 2005HvaOB..29..225Y
- Keywords:
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- solar radio emission;
- polarization