FLAREs, CMEs and Stereo Mission

Details FLAREs, CMEs and Stereo Mission FLAREs, CMEs and Stereo Mission

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004agufmsh23a..03l&link_type=abstract

American Geophysical Union, Fall Meeting 2004, abstract #SH23A-03

Physics

7513 Coronal Mass Ejections, 7519 Flares, 2118 Energetic Particles, Solar

Scientific paper

A recent study of Cane et al. [2003] showed that in some intense SEP events, the ion time-intensity profiles exhibit two peaks, with an earlier one having a high Fe/O and a later one having a low Fe/O ratio. They suggested that these two-component events are due to CMEs and their accompanying flares occuring together, with the first peak being flare-related and the second peak being CME-driven shock related. We develop a model which examines particle accleration and transport when both flares and CM-driven shocks are present. Time-intensity profiles for three different scenarios: a pure shock case, a pure flare case and a shock-flare-mixed case are studied. Using reasonable estimates of the relative timing between CMEs and associated flares, we find that a large portion of the flare accelerated material is subject to absorption and re-acceleration by the CME-driven shock. Consequently, the time intensity profile for the shock-flare-mixed case shows an initial rapid increase, owing to particles accelerated at the flare site and followed by a plateau similar to that of a pure shock case. Furthermore, depending on the longitude of the spacecraft (whether it is well connected to the CME-driven shock only or the flare only or both), the same shock-flare-mixed event may exhibit different behaviors. The STEREO mission, which is scheduled to launch dual spacecraft in early 2005, will provide an excellent opportunity to study in further details of the relationship between solar flares and CMEs.

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