Volume 501 - 39th International Cosmic Ray Conference (ICRC2025) - Gamma-Ray Astrophysics
Spectral Shape of Galactic Cosmic Rays: Modeling and Implications on Diffusive Gamma-Ray Emission
L.E. Espinosa Castro*, L.E. Espinosa Castro, F.L. Villante, V. Vecchiotti, C. Evoli and G. Pagliaroli
*: corresponding author
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Pre-published on: September 23, 2025
Published on: —
Abstract
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.
DOI: https://doi.org/10.22323/1.501.0640
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