Non-linear diffusion of cosmic rays escaping from supernova remnants - I. The effect of neutrals

Understand

Supernova remnants are believed to be the main sources of galactic Cosmic Rays (CR).

• Within this framework, particles are accelerated at supernova remnant shocks and then released in the interstellar medium.
• The mechanism through which CRs are released and the way in which they propagate still remain open issues.
• The main difficulty is the high non-linearity of the problem: CRs themselves excite the magnetic turbulence that confines them close to their sources.