Speaker
Description
SNRs are believed to be a likely sources of Galactic cosmic-ray protons with energies of PeV and above. High-energy protons, escaped from the shock front, diffuse in the ambient ISM and produce gamma rays as products of neutral pion decay from proton-proton interactions.
Current models use a constant diffusion coefficient over the whole map to describe cosmic rays travelling through the ambient ISM.
The diffusion coefficient depends on the diffusion suppression factor and the magnetic fields a proton traverses. I estimate the local magnetic field along the pathway of cosmic-ray protons estimated by the gas densities of the ISM clouds they pass through and combine this with a model for the change in the diffusion suppression factor. Obtaining a position-dependent diffusion coefficient with a non-symmetric proton distribution
