The emission mechanism of solar moving Type IV metre-wave radio sources
Abstract
It is suggested that most moving Type IV solar radio sources arise not through gyrosynchrotron emission, but through Langmuir wave conversion in a corona whose density has been transiently enhanced by a factor of up to 40. Results are based on analyses of eight moving Type IV events observed with the Culgoora radioheliograph. In brightness, shape, size, sense of polarization, dispersion of height with observing frequency and increase of size with decreasing observing frequency, most moving Type IV radio sources are shown to closely resemble common solar radio sources which are universally believed to arise through Langmuir wave conversion.
- Publication:
-
Publications of the Astronomical Society of Australia
- Pub Date:
- 1980
- DOI:
- 10.1017/S1323358000018828
- Bibcode:
- 1980PASA....4...67D
- Keywords:
-
- Electrostatic Waves;
- Radio Sources (Astronomy);
- Solar Corona;
- Solar Radiation;
- Type 4 Bursts;
- Brightness Temperature;
- Circular Polarization;
- Solar Magnetic Field;
- Synchrotron Radiation;
- Solar Physics