Proton signatures of halo CMEs at L1

Details Proton signatures of halo CMEs at L1 Proton signatures of halo CMEs at L1

Sep 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003esasp.535..593r&link_type=abstract

In: Solar variability as an input to the Earth's environment. International Solar Cycle Studies (ISCS) Symposium, 23 - 28 June 2

Computer Science

Sun, Cmes, Proton Acceleration

Scientific paper

We study the 0.07-500 MeV proton intensities for 20 interplanetary disturbances at L1, most of which are clearly associated with halo coronal mass ejections (CMEs). In the majority of cases we observe characteristic variations in the intensity-time profiles, apparently as a result of these disturbances. By comparing these events taken from 3 years of data, we find these same signatures can be oberved even with particularly mild interplanetary disturbances. A simple analysis of these events suggests relatively fast (500-700 km/s) CME-driven shocks are likely to contribute to proton SEPs at energies of up to ~15 MeV. We also speculate that at energies above ~100 MeV, the proton intensities may well result from a combination of flare and CME acceleration/re-acceleration.

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