Speaker
Description
Cosmic rays interact with magnetized plasma via scattering with the magnetic fluctuations or waves embedded in the plasma. As they stream through the plasma they excite Alfven waves. This forms a self-consistent system. The structure and evolution of the system can be studied by treating the system as a multi-fluid system. We are interested in the three-fluid system which comprises thermal plasma, cosmic rays and a self-excited Alfven wave. The one-dimensional flows of the case of forward propagating Alfven wave have been studied quite thoroughly. In this work we focus on the case of backward propagating Alfven wave. This case is more complicated as there are two more singularities related to the Alfven Mach number. In addition to the three possible flows in the forward-wave case, the backward-wave case can accommodate six more possibilities. The most unexpected ones are the transonic flows in this one-dimensional non-dissipative system.
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