| Abstract |
Cosmic rays produce some of the most energetic emission in the Universe.
They play a key role in the dynamics and energy balance of galactic gas,
and allow us to probe galactic and intergalactic magnetic fields in the
present epoch and over cosmic time. The acceleration and propagation of
cosmic rays, and the mechanisms by which they interact collectively with
their environments, are largely plasma physics problems. I will briefly
review some salient aspects of cosmic ray astrophysics and describe
recent progress toward understanding cosmic ray plasma physics. |