Particle acceleration at corotating interaction regions

Details Particle acceleration at corotating interaction regions Particle acceleration at corotating interaction regions

Jun 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999aipc..471..625c&link_type=abstract

The solar wind nine conference. AIP Conference Proceedings, Volume 471, pp. 625-628 (1999).

Computer Science

1

Particle Acceleration

Scientific paper

The acceleration of charged particles at corotating interaction regions (CIRs) leads to a quasi-permanent generation of high energy particles in the heliosphere-even in times of a quiet sun. We study this process as a special kind of particle acceleration at collisionless shock waves. Therefore, we analyze the correlation between the fluid description, the flux of high energy particles, and the wave turbulence at these shocks. The forward and reverse shocks at the CIR boundaries are regarded as individual shocks and we analyze their MHD relevant parameters; i.e. Alfvén-Mach numbers, compression ratios, and critical Mach numbers. Furthermore, the role of low frequency plasma waves for an efficient particle acceleration is investigated. The data set is taken from Ulysses measurements of the CIR-series observed between July 1992 and December 1993. The aim of this analysis is to enclose the possible acceleration mechanisms.

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