SEP Acceleration Efficiency of CMEs

Details SEP Acceleration Efficiency of CMEs SEP Acceleration Efficiency of CMEs

Dec 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005agufmsh14a..02h&link_type=abstract

American Geophysical Union, Fall Meeting 2005, abstract #SH14A-02

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2101 Coronal Mass Ejections (7513), 2114 Energetic Particles (7514), 7513 Coronal Mass Ejections (2101)

Scientific paper

We investigate the efficiency of coronal mass ejections (CMEs) in accelerating solar energetic particles (SEPs) by comparing their respective kinetic energy budgets. Our SEP sample comprises a list of 20-30 well-observed events whose energy spectra are obtained by combining data from multiple in-situ instruments. The corresponding CMEs were observed with the LASCO coronagraphs. Calibrated images were used for the mass and velocity measurements. Because most of these events correspond to fast and extended CMEs, extra care was taken during the measurements to isolate the ejecta from other signatures usually associated with these type of events. The CME masses were corrected to the first order, for projection effects assuming radial propagation from the corresponding source regions. The implications for the acceleration efficiency of CMEs derived from the comparison between CME and SEP energies are discussed.

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