Spectral Shape of Galactic Cosmic Rays: Modeling and Implications on Diffusive Gamma-Ray Emission
We model the hadronic gamma-ray production in the Galaxy using an updated phenomenological description of the cosmic ray spectra and different Galactic gas templates. We find a persistent discrepancy in both normalization and spectral shape between the predicted gamma-ray flux and observations by LHAASO. We conclude that the local cosmic-ray proton flux measured by LHAASO overshoots the Galactic gamma-ray emission observed in the TeV-PeV sky, calling for a revision of current cosmic ray models.
Authors
- G. Pagliaroli (ORCID: https://orcid.org/0000-0002-6751-9996)
- Vittoria Vecchiotti (ORCID: https://orcid.org/0000-0002-9802-3678)
- F.L. Villante (ORCID: https://orcid.org/0000-0001-7667-4499)
- Carmelo Evoli (ORCID: https://orcid.org/0000-0002-6023-5253)
- Luis Enrique Espinosa Castro (ORCID: https://orcid.org/0009-0004-6030-2788)
Publication Details
- Published
- 2025-09-23
- DOI
- https://doi.org/10.22323/1.501.0640
- Primary Topic
- Dark Matter and Cosmic Phenomena
- Type
- article
- Field-Weighted Citation Impact
- 0.00