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Journal Article

The origin of Galactic cosmic rays: Challenges to the standard paradigm

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Strong,  Andrew
High Energy Astrophysics, MPI for Extraterrestrial Physics, Max Planck Society;

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Citation

Gabici, S., Evoli, C., Gaggero, D., Lipari, P., Mertsch, P., Orlando, E., et al. (2019). The origin of Galactic cosmic rays: Challenges to the standard paradigm. International Journal of Modern Physics D, 28(15): 1930022. doi:10.1142/S0218271819300222.


Cite as: https://hdl.handle.net/21.11116/0000-0005-960D-4
Abstract
A critical review of the standard paradigm for the origin of Galactic cosmic rays (CRs) is presented. Recent measurements of local and far-away CRs reveal unexpected behaviors, which challenge the commonly accepted scenario. These recent findings are discussed, together with long-standing open issues. Despite the progress made thanks to ever-improving observational techniques and theoretical investigations, at present our understanding of the origin and of the behavior of CRs remains incomplete. We believe it is still unclear whether a modification of the standard paradigm, or rather a radical change of the paradigm itself is needed in order to interpret all the available data on CRs within a self-consistent scenario.