Type III solar radio bursts observed at 169 MHz: Height and relative positions in pairs
✍ Scribed by C. Mercier; H. Rosenberg
- Publisher
- Springer
- Year
- 1974
- Tongue
- English
- Weight
- 732 KB
- Volume
- 39
- Category
- Article
- ISSN
- 0038-0938
No coin nor oath required. For personal study only.
✦ Synopsis
Seventy-six type 1II solar radio bursts or burst groups occurring over 41 days in the period November 1968 to July 1971 were studied with high time and spatial resolution at 169 MHz and high time and spectral resolution between 160 and 320 MHz. The average height of the sources at 169 MHz was found to be 0.34-k 0.03 R| above the photosphere. This result is discussed in terms of scattering effects, refraction effects, nonvalidity of the radial hypothesis, and the dispersion in actual height.
The occurrence of fundamental-harmonic pairs and their position is discussed, and the arguments in favour of emission at the fundamental or at the harmonic of the local plasma frequency for the majority of all type III bursts are presented. The greater probability of the latter hypothesis is pointed out.