Outflows driven by cosmic rays and waves
Bilal Ramzan1*, D.O. Chernyshov2, Chung-Ming Ko3,1
1Graduate Institute of Astronomy, National Central University, Taoyuan, Taiwan
2I.E. Tamm Theoretical Physics Division of P.N., Lebedev Institute of Physics, Moscow, Russian Federation
3Department of Physics, National Central University, Taoyuan, Taiwan
* Presenter:Bilal Ramzan, email:bilalramzan90@yahoo.com
Cosmic rays are energetic particles and their transport plays an important role in the feedback processes in the interstellar medium. We are interested in the dynamical feedback. We adopt a hydrodynamic approach to cosmic ray propagation which comprises three-fluids: thermal plasma, cosmic ray and a self-excited Alfvèn wave. The thermal plasma is described by a density and a pressure, while the cosmic ray and Alfvèn wave are considered as massless fluid with significant pressures. We systematically seek steady state solutions of the system in flux-tube formulation. We present results in two categories: with and without cosmic ray diffusion, and two cases within each category: without wave damping and with effective wave damping. We will take Galactic wind as an example.

Keywords: Interstellar medium, Cosmic rays, Thermal plasma, Self-excited Alfvèn wave, Galactic wind