Element and Isotopic Fractionation in Closed Magnetic Structures |
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Authors: | TH Zurbuchen LA Fisk G Gloeckler NA Schwadron |
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Institution: | (1) Department of Atmospheric, Oceanic and Space Sciences, University of Michigan, Ann Arbor, USA |
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Abstract: | Recent papers have suggested that the slow solar wind is a super-position of material which is released by reconnection from
large coronal loops. This reconnection process is driven by large-scale motions of solar magnetic flux driven by the non-radial
expansion of the solar wind from the differentially rotating photosphere into more rigidly rotating coronal holes.
The elemental composition of the slow solar wind material is observed to be fractionated and more variable than the fast solar
wind from coronal holes. Recently, it has also been reported that fractionation also occurs in 3He/4He. This may be interpreted
in the frame-work of an existing model for fractionation on large coronal loops in which wave-particle interactions preferentially
heat ions thereby modifying their scale-heights.
This revised version was published online in June 2006 with corrections to the Cover Date. |
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Keywords: | Solar wind solar wind composition FIP fractionation 3He/4He fractionation solar magnetic field |
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