Diffusive origin for the cosmic-ray spectral hardening reveals signatures of a nearby source in the leptons and protons data
In this work we aim at reproducing, simultaneously, the spectral feature at ∼10 TeV in the cosmic-ray proton spectrum, recently reported by the DAMPE Collaboration, together with the spectral break at ∼1 TeV measured by H.E.S.S. in the lepton spectrum. Those features are interpreted as signatures of...
| Autores: | , , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2021 |
| País: | España |
| Institución: | Universidad Autónoma de Madrid |
| Repositorio: | Biblos-e Archivo. Repositorio Institucional de la UAM |
| Idioma: | inglés |
| OAI Identifier: | oai:repositorio.uam.es:10486/705503 |
| Acceso en línea: | http://hdl.handle.net/10486/705503 https://dx.doi.org/10.1103/PhysRevD.104.103013 |
| Access Level: | acceso abierto |
| Palabra clave: | Cosmos Dark Matter Antiprotons Física |
| Sumario: | In this work we aim at reproducing, simultaneously, the spectral feature at ∼10 TeV in the cosmic-ray proton spectrum, recently reported by the DAMPE Collaboration, together with the spectral break at ∼1 TeV 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 dipoleanisotropy data as long as the rigidity scaling of the diffusion coefficient features a hardening at ∼200 GV, 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 |
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