Abstract
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 language | English |
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Pages | 434 |
Publication status | Published - 1 Dec 2004 |
Event | American Geophysical Union, Fall Meeting 2004 - , United Kingdom Duration: 1 Jan 2004 → … |
Conference
Conference | American Geophysical Union, Fall Meeting 2004 |
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Country/Territory | United Kingdom |
Period | 1/01/04 → … |
Keywords / Materials (for Non-textual outputs)
- 7513 Coronal mass ejections
- 7519 Flares
- 2118 Energetic particles
- solar