Evidence for a coronal magnetic bottle at 10 solar radii
✍ Scribed by Kenneth H. Schatten
- Publisher
- Springer
- Year
- 1970
- Tongue
- English
- Weight
- 400 KB
- Volume
- 12
- Category
- Article
- ISSN
- 0038-0938
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✦ Synopsis
The Faraday rotation of a radio source (Pioneer 6) occulted by the solar corona has been measured by Levy et al. (1969).
During the course of these measurements, three large-scalc transient phenomena were observed. These events were preceded by subflares and class I flares. These transient events are interpreted as evidence for a coronal magnetic bottle at 10 R| The velocity of propagation for the disturbance is set at 200 km/sec; the dimension of the region, 10 R| field strength at 10 Ro, 0.02 G; particle density, 2.0 • 10'~/cln'.~; Alfv6n speed, 320 km/sec. From the nature of the observations and the lack of related effects from similar flares on the interplanetary sector pattern observed at 1 AU, it is suggested that such coronal magnetic bottles expand to perhaps 10-30 R o and then contract to a few solar radii. Such a phenomena is evidence for an expansion of the corona with a sub-Alfv6nic velocity. It is further suggested that such magnctic bottles may be important in the storage and diffusion of solar generated cosmic ray particles.