Particle spectra and upstream turbulence at CME-driven shocks

W. K. Rice, G. Li, G. P. Zank

Research output: Contribution to conferenceAbstract


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.
Original languageEnglish
Publication statusPublished - 1 Dec 2004
EventAmerican Geophysical Union, Fall Meeting 2004 - , United Kingdom
Duration: 1 Jan 2004 → …


ConferenceAmerican Geophysical Union, Fall Meeting 2004
Country/TerritoryUnited Kingdom
Period1/01/04 → …


  • 7513 Coronal mass ejections
  • 7519 Flares
  • 2118 Energetic particles
  • solar


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