Spectral breaks as a signature of cosmic ray induced turbulence in the Galaxy.

@article{Blasi2012SpectralBA,
  title={Spectral breaks as a signature of cosmic ray induced turbulence in the Galaxy.},
  author={Pasquale Blasi and Elena Amato and P. D. Serpico},
  journal={Physical review letters},
  year={2012},
  volume={109 6},
  pages={
          061101
        }
}
We show that the complex shape of the cosmic ray (CR) spectrum, as recently measured by PAMELA and inferred from Fermi-LAT γ-ray observations of molecular clouds in the Gould belt, can be naturally understood in terms of basic plasma astrophysics phenomena. A break from a harder to a softer spectrum at rigidity R is approximately equal to 10 GV follows from a transition from transport dominated by advection of particles with Alfvén waves to a regime where diffusion in the turbulence generated… CONTINUE READING