Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006iaujd...1e..41j&link_type=abstract
Cosmic Particle Acceleration, 26th meeting of the IAU, Joint Discussion 1, 16-17 August, 2006, Prague, Czech Republic, JD01, #41
Astronomy and Astrophysics
Astrophysics
Scientific paper
We present initial simulation results for the time evolution of CR modified plane parallel shocks in magnetohydrodynamical flows. The simulations are built on a well-tested MHD TVD scheme for the bulk dynamics that sharply captures dissipative subshocks. The calculations incorporate self-consistent treatment of the momentum-dependent CR diffusion convection equation coupled with wave action equations for resonantly scattering Alfven and fast mode waves. These equations are handled very efficiently using our newly developed "Coarse Grained finite Momentum Volume" (CGMV) transport scheme. This allows us to explore nonlinear feedback among the particles, the wave turbulence and the bulk flows, including study of the importance of different wave modes. Recent advances in MHD turbulence theory require a broadened outlook on scattering processes in CR modified shocks. TWJ is supported for this work in part by NASA grant NNG05GF57G. HK is supported in part by KOSEF through the Astrophysical Research Center for the Structure and Evolution of Cosmos (ARCSEC).
Jones Thomas W.
Kang Hyesung
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