Abstract
We investigate the diffusion of cosmic rays (CRs) close to their sources. Propagating individual CRs in purely isotropic turbulent magnetic fields with maximal scale of spatial variations , we find that CRs diffuse anisotropically at distances from their sources. As a result, the CR densities around the sources are strongly irregular and show filamentary structures. We determine the transition time to standard diffusion as , with and for a turbulent field with a Kolmogorov power spectrum. We calculate the photon emission due to CR interactions with gas and the resulting irregular source images.
- Received 16 April 2012
DOI:https://doi.org/10.1103/PhysRevLett.108.261101
© 2012 American Physical Society