Diffusive Origin of the Cosmic-Ray Spectral Hardening
arXiv:1210.7274 · doi:10.1088/1742-6596/409/1/012052
Abstract
Recent data from ATIC, CREAM and PAMELA revealed that the energy spectra of cosmic ray (CR) nuclei above 100 GeV/nucleon experience a remarkable hardening with increasing energy. This effect cannot be recovered by the conventional descriptions of CR acceleration and diffusive propagation processes. Using analytical calculations, I show that the hardening effect can be consequence of a spatial change of the CR diffusion properties in different regions of the Galaxy. I discuss the implications of this scenario for the main CR observables and its connections with the open issues of the CR physics.
4 pages, 1 figure, 23rd ECRS, Moscow, 2012
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