Particle spectra and upstream turbulence at CME-driven shocks

Details Particle spectra and upstream turbulence at CME-driven shocks Particle spectra and upstream turbulence at CME-driven shocks

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004agufmsh21c0434r&link_type=abstract

American Geophysical Union, Fall Meeting 2004, abstract #SH21C-0434

Other

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

Scientific paper

Particle spectra at a CME-driven shock often exhibit a power law to certain energies, then roll over exponentially. However, there are cases where a spectrum evolves to another power law, often softer, above a certain energy (e.g. the Oct. 29th, 2003 event [Mewaldt et al., 2004]. By introducing an effective ``loss term'' to the transport equation, we show that under certain circumstances, a broken power law can be obtained. We discuss the physical meaning of the loss term and its relationship with the upstream turbulence. We note that observations of particle spectra at CME-driven shocks provide us a complimentary method for studying the upstream turbulence in front of the shock.

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