Fiber Bursts and the Coronal Magnetic Field
Abstract
In fiber (intermediate drift) radio bursts occurring in some type IV burst continua, information is reflected about the strength and the topology of the coronal magnetic field. This information can be extracted by combining decimetre and metre wave radio spectral, radio imaging, and magnetograph observations. In studying a C-class and a X-class flare, we find two different structures by tracing the fiber bursts: a simple coplanar system of postflare loops; and a distributed system of interconnecting postflare- and post-CME loops. In the first case the magnetic field strength in the postflare loops is roughly an order of magnitude smaller than in the coronal field model of Dulk and McLean (1978). In the second case that model describes the observed field values well.
- Publication:
-
Central European Astrophysical Bulletin
- Pub Date:
- 2008
- Bibcode:
- 2008CEAB...32...43R
- Keywords:
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- Sun;
- corona;
- magnetic field;
- flare;
- CME;
- radio emission