Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008apj...675l..45b&link_type=abstract
The Astrophysical Journal, Volume 675, Issue 1, pp. L45-L48.
Astronomy and Astrophysics
Astronomy
5
Acceleration Of Particles, Magnetohydrodynamics: Mhd, Shock Waves, Sun: Solar Wind, Sun: Coronal Mass Ejections (Cmes), Turbulence
Scientific paper
We analyze suprathermal ions and plasma wave spectra upstream of interplanetary shocks driven by coronal mass ejection events. In particular, we analyze the competition between two processes: (1) the upstream wave generation by suprathermal protons accelerated at the shock, and (2) the cascading of wave energy in the inertial range of solar wind turbulence. We derive the cascading timescale from the comparison of particle and turbulent wave spectra with theory and conclude that amplified solar wind turbulence upstream of interplanetary traveling shocks is better described by Iroshnikov-Kraichnan-type rather than Kolmogorov-type wave diffusion.
Bamert K.
Hilchenbach Martin
Kallenbach Reinald
le Roux Jakobus A.
Smith Walter C.
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