Disclaimer: The following material is being kept online for archival purposes.
Although accurate at the time of publication, it is no longer being updated. The page may contain broken links or outdated information, and parts may not function in current web browsers.
Energetic Particles and Coronal Mass Ejections
An association between solar energetic particle (SEP) events and CMEs has
been known for some time. Here I review some recent work on this
relationship. Comparisons of the peak intensities (I) of 2.1 to 2.5
and 18 to 22 MeV proton events with the speeds (V) of the associated CMEs
near the Sun were done for events selected for the ISTP Workshop.
The SEP intensities were taken from the GSFC particle detectors on the
Wind and IMP-8 spacecraft, and the CME speeds from the LASCO coronagraph
on the SOHO spacecraft. A second comparison was done with energetic
particle intensities measured on the Helios spacecraft and CME speeds from
the SOLWIND coronagraph for interplanetary shock events analyzed by Sheeley
et al. (1985). The data points from the two sets of events at different
epochs agree quite well and show correlation coefficients of r = 0.6 to
0.7 for the comparison of log I against log V. More recent studies
have related the observed energetic electron events to CMEs and attempted
to determine what additional conditions of the corona might be important
in determining the peak intensities and profiles of the energetic particle
Organization: Air Force Research Laboratory
Telephone: 781 377 9665
29 Randolph Rd.
Hanscom AFB, MA
Above is background material for archival reference only.