Non-radial magnetic field structures in the solar corona
Abstract
We report on the structure and geometry of coronal magnetic fields inferred from the observations of meter-decimeter type III and moving type IV radio bursts, associated with a Hα flare. This is the first report of type III radio bursts from the Nançay radioheliograph after it acquired the two-dimensional multifrequency capability. Dispersion of the radio source positions with frequency suggests that open and closed field lines are considerably inclined to the radial direction which is consistent with the connectivity observed in the magnetogram. We suggest that multiple arch systems are involved in the type IV emission. From the polarization and dispersion characteristics of the type IV source, we infer that the emission is due to fundamental plasma emission.
- Publication:
-
Solar Physics
- Pub Date:
- March 1994
- DOI:
- 10.1007/BF00712893
- Bibcode:
- 1994SoPh..150..317G
- Keywords:
-
- Magnetic Field Configurations;
- Polarized Electromagnetic Radiation;
- Radio Astronomy;
- Radio Spectra;
- Solar Corona;
- Solar Electrons;
- Solar Magnetic Field;
- Solar Prominences;
- Type 3 Bursts;
- Type 4 Bursts;
- Centroids;
- Magnetic Signatures;
- Plasma Dynamics;
- Plasmas (Physics);
- Spectroheliographs;
- Solar Physics;
- Flare;
- Solar Phys;
- Solar Corona;
- Radio Burst;
- Coronal Magnetic Field