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X-Ray Spectra of Solar Active Regions

Published online by Cambridge University Press:  14 August 2015

John H. Parkinson
John H. Parkinson*
Affiliation:
Mullard Space Science Laboratory, Dept. of Physics and Astronomy, University College London, Holmbury St. Mary, Dorking, Surrey, England

Abstract

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The last few years have seen great progress in our understanding of X-ray spectra of solar active regions. This paper demonstrates both the usefulness and the limitations of the techniques, both scientific and instrumental, that have recently become available. Improvements in spectral resolution led to the discovery of weak satellite lines to helium-like ions; the quantitative theory for these lines is also discussed. The observed intensities of the Fe XVII lines are also investigated and found to be in agreement with calculations that allow for cascading processes.

Information

Type
Part 2: Active Regions
Information
Symposium - International Astronomical Union , Volume 68: Solar X, Gamma, and EUV Radiation , 1975 , pp. 45 - 64
Copyright
Copyright © Reidel 1975 

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