Polarization and location of metric radiobursts in relationship with the emergence of a new magnetic field.
Abstract
Spike bursts have been observed in association with some solar type III burst groups. In this event, the spikes appear according to bandwidth and duration to be mini type I bursts. Their circular polarization cannot be explained by emission of the ordinary mode in the magnetic field of the dominant photospheric polarity. This observation is interpreted by the expansion at 0.3 solar radii of magnetic loops related to the emergence of a satellite polarity. A coronal-field model is proposed for the whole active center. Application of the theory of Mangeney and Veltri (1976) for type I bursts leads to a consistent picture of the generation of these spikes.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- May 1978
- Bibcode:
- 1978A&A....66...81H
- Keywords:
-
- Circular Polarization;
- Photosphere;
- Solar Magnetic Field;
- Solar Radio Bursts;
- Very High Frequencies;
- Atmospheric Models;
- Electron Beams;
- Magnetic Effects;
- Solar Activity Effects;
- Solar Corona;
- Solar Flares;
- Solar Physics;
- Magnetic Fields:Solar Corona;
- Solar Radio Bursts