Iron charge distribution as an identifier of interplanetary coronal mass ejections

Details Iron charge distribution as an identifier of interplanetary coronal mass ejections Iron charge distribution as an identifier of interplanetary coronal mass ejections

Dec 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001jgr...10629231l&link_type=abstract

Journal of Geophysical Research, Volume 106, Issue A12, p. 29231-29238

Astronomy and Astrophysics

Astrophysics

51

Solar Physics, Astrophysics, And Astronomy: Coronal Mass Ejections

Scientific paper

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 Fe>=16+ 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 2×106 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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