Cosmic ray propagation in galactic turbulence

Understand

We revisit propagation of galactic cosmic rays (CRs) in light of recent advances in CR diffusion theory in realistic interstellar turbulence.

• We use a tested model of turbulence in which it has been shown that fast modes dominate scattering of CRs.
• As a result, propagation becomes inhomogeneous and environment dependent.
• By adopting the formalism of the nonlinear theory developed by Yan & Lazarian, we calculate the diffusion of CRs self-consistently from first principles.