Type-Iii Bursts Traced from the Solar Surface to 1-AU
Abstract
Type III radio bursts were traced from the sun until they can be observed as in situ electrons at the ISEE-3 spacecraft. The study extends over the period of operation of the electron experiment on ISEE-3 from August 1978 to November 1979. The observations include data from solar flares, kilometric-type III burst spectra from ISEE-3, and in situ measurements of low-energy electrons from ISEE-3. By carefully restricting the data sets involved, a peak is found of 20-deg width in the number of flares associated with in situ electrons near 60-deg west solar longitude. This peak shows that the electron beams of type III bursts are not spread over a great range of longitudes as earlier studies indicate, but are fairly limited in spatial extent. However, even in that longitude range, only 40 percent of type-III-flare events are associated with in situ electrons.
- Publication:
-
Basic Plasma Processes on the Sun
- Pub Date:
- 1990
- Bibcode:
- 1990IAUS..142..509L
- Keywords:
-
- International Sun Earth Explorers;
- Solar Electrons;
- Solar Flares;
- Solar Radio Emission;
- Type 3 Bursts;
- Electron Beams;
- Electron Energy;
- Solar Physics