Theoretical Model for Type III Radio Emission from the Sun.
Abstract
A model is suggested which can explain the excitation of type III radio bursts from the sun. The physical picture is a stream of fast charged particles that induce electric fields (polarization) in the surrounding corona. These electric fields will accelerate the electrons in the neighboring coronal regions which in turn emit a spectrum that consists of a weak (bremsstrahlung) continuum and a superimposed resonance line just above the plasma frequency. The resonance emission is thus able to propagate out from the corona. Its spectral characteristics depend crucially on the speed and other physical properties of the exciting charge cloud. Predicted spectra for various possible physical situations are shown. This work was supported by the National Aeronautics and Space Administration.
- Publication:
-
The Astronomical Journal
- Pub Date:
- 1964
- DOI:
- 10.1086/109436
- Bibcode:
- 1964AJ.....69R.530A