Physics
Scientific paper
Dec 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005agufmsh12a..05r&link_type=abstract
American Geophysical Union, Fall Meeting 2005, abstract #SH12A-05
Physics
2101 Coronal Mass Ejections (7513), 2111 Ejecta, Driver Gases, And Magnetic Clouds, 2164 Solar Wind Plasma, 7519 Flares
Scientific paper
In situ solar wind composition provides information about the coronal origins of the solar wind plasma. Interplanetary coronal mass ejections (ICMEs), in particular, often contain enhancements in compositional quantities such as charge state ratios and heavy ion abundances, which indicate the CME plasma accesses the low corona and is significantly heated during the transit through the upper corona. On average, these enhancements weakly correlate with associated flare magnitudes and the enhancements tend to be observed more often in ICMEs which originate near central longitudes. Within a given ICME, the composition can vary dramatically. Enhancements may appear for short periods within an ICME or extend beyond the designated ICME boundaries (as determined by counterstreaming electrons or magnetic field measurements). We examine the time profiles of several ICME parameters and compare the variations to predictions from CME initiation models.
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