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Paper: Coronal Abundances: What are They?
Volume: 154, Cool Stars, Stellar Systems and the Sun: Tenth Cambridge Workshop
Page: 91
Authors: Jordan, C.; Doschek, G. A.; Drake, J. J.; Galvin, A. B.; Raymond, J. C.
Abstract: Derivation of coronal abundances in the Sun and cool stars has led to conflicting results. In some stars, the coronal abundances appear metal deficient (MAD: a metal abundance deficiency), in others the abundance seems dependent on the ionization potential of the first ion (FIP-effect: First Ionization potential). Additionally, in the Sun there may be evidence for abundance variations from one feature to another. If abundance differences are real, they could give valuable insight to the physical processes of heating and mass transport in the chromospheres and coronas of cool stars.
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