Anomalous Solar Wind Composition Observed With SWICS on ACE in January 2005

Details Anomalous Solar Wind Composition Observed With SWICS on ACE in January 2005 Anomalous Solar Wind Composition Observed With SWICS on ACE in January 2005

May 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005agusmsh34a..02g&link_type=abstract

American Geophysical Union, Spring Meeting 2005, abstract #SH34A-02

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2164 Solar Wind Plasma, 2169 Sources Of The Solar Wind, 7509 Corona

Scientific paper

During a ~20 day period in January 2005 the Sun released some of the most unusual solar wind, characterized at times by periods of high densities of 3He++ and at other times by extremely low or very high ionization states of heavy ions. Such episodes seem to be rare, with the last reported occurrence in May 1998 (Gloeckler et al., 1999). In the January 2005 events the solar wind 3He++ density increased by ~40 during a ~10 hour interval on day 8 and again on days 16, 19 and 27. Very low charge states of all detectable minor ions (C, N, O, Ne, Si and Fe) were observed during short intervals on day 9. For example, during these periods all charge states of oxygen, from 1 to 8 were seen. At the time around the big blast of the ~1400-1500 km/s solar wind (from day ~18.27 to ~18.35) a very hot solar wind (e. g. almost all C+6, O+8) was observed. We will report on these and other aspects of this unusual solar wind and compare them to the May 1998 observations. Implications of these results will be discussed. Gloeckler, G., et al., Unusual composition of the solar wind in the 2-3 May 1998 CME observed with SWICS on ACE, Geophys. Res. Lett. 26,157-160, 1999.

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