A diffusive origin for the cosmic-ray spectral hardening reveals signatures of a nearbysource in the leptons and protons data
arXiv:2007.15321 · doi:10.1103/PhysRevD.104.103013
Abstract
In this work we aim at reproducing, simultaneously, the spectral feature at in the cosmic-ray proton spectrum, recently reported by the DAMPE Collaboration, together with the spectral break at measured by H.E.S.S. in the lepton spectrum. Those features are interpreted as signatures of one nearby hidden cosmic-ray accelerator. We show that this interpretation is consistent with the dipole-anisotropy data as long as the rigidity scaling of the diffusion coefficient features a hardening at , as suggested by the light-nuclei data measured with high accuracy by the AMS-02 Collaboration. Such rigidity-dependent diffusion coefficient is applied consistently to the large-scale diffuse cosmic-ray sea as well as to the particles injected by the nearby source.
arXiv commentPublished in: Phys.Rev.D 104 (2021) 10, 103013
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