The observational evidence on the strength of the coronal magnetic field above active regions is reviewed. Recent advances in observations and plasma theory are used to determine which data are the more reliable and to revise some earlier estimates of field strength. The results from the different t
The evolution of coronal magnetic fields
โ Scribed by E. R. Priest; T. G. Forbes
- Publisher
- Springer
- Year
- 1990
- Tongue
- English
- Weight
- 351 KB
- Volume
- 130
- Category
- Article
- ISSN
- 0038-0938
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โฆ Synopsis
Slow photospheric motions can produce flow speeds in the corona which are fast enough to violate quasi-static evolution. Therefore, high-speed flows observed in the corona are not necessarily due to a loss of equilibrium or stability. In this letter we present an example where the flow speed increases indefinitely with height, while the coronal magnetic energy increases quadratically with time.
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