期刊
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
卷 106, 期 A12, 页码 29231-29238出版社
AMER GEOPHYSICAL UNION
DOI: 10.1029/2001JA000014
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We present solar wind Fe charge state data measured on the Advanced Composition Explorer (ACE) from early 1998 to the middle of 2000. Average Fe charge states in the solar wind are typically around 9+ to 11+. However, deviations from these average charge states occur, including intervals with a large fraction of Fegreater than or equal to16+ which are consistently associated with interplanetary coronal mass ejections (ICMEs). By studying the Fe charge state distribution we are able to extract coronal electron temperatures often exceeding 2 X 10(6) kelvins. We also discuss the temporal trends of these events, indicating the more frequent appearance of periods with high Fe charge states as solar activity increases.
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