Spatial dispersion of Faraday rotation and its connexion with mode coupling

✍ Scribed by Christian Mätzler

• Publisher: Springer
• Year: 1973
• Tongue: English
• Weight: 676 KB
• Volume: 32
• Category: Article
• ISSN: 0038-0938
• DOI: 10.1007/bf00152740

✦ Synopsis

It is shown that the lack of linear polarization in the microwave radiation of solar bursts (reported in a earlier paper) may be explained by spatial dispersion of Faraday rotation. The maximum source diameter s without noticeable destruction of linear polarization is determined by the electron density and the magnetic field strength in the volume, where the linear polarization is generated. In the case where linear polarization is produced by the radiation source, s is smaller than only 20 km. In the other case where linear polarization is produced by mode coupling in a quasi-transverse magnetic field in the corona, the s-values are found to range from 10 to 6000 kin, which is still much smaller than the generally adopted sizes of microwave burst sources. The second case has been investigated for several models of magnetic fields.