Astronomy and Astrophysics – Astrophysics
Scientific paper
May 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002agusmsh32a..04l&link_type=abstract
American Geophysical Union, Spring Meeting 2002, abstract #SH32A-04
Astronomy and Astrophysics
Astrophysics
7500 Solar Physics, Astrophysics, And Astronomy, 7513 Coronal Mass Ejections, 7536 Solar Activity Cycle (2162), 7537 Solar And Stellar Variability
Scientific paper
It has been shown that high Fe charge states are observed to occur in the presence of Interplanetary Coronal Mass Ejections (ICMEs) at 1 AU. This provides an identifier of ICMEs that is independent of expansion processes. Using this new identifier, we present a comparative study of Fe charge state events as a function of latitude and time. We compare Fe charge state data from the ACE spacecraft in the ecliptic plane with that from the Ulysses spacecraft from low to high latitudes. We discuss the frequencies of high Fe charge state events through a range of latitudes over an entire solar cycle. Close to solar activity maximum, we find that the frequencies of high Fe charge state events appear to be independent of latitude.
Fisk Len
Lepri Susan T.
Sulerud C.
Zurbuchen Thomas H.
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