What type of study is this?

This is a Quantitative Study study.

September 26, 2025Open Access

Spectral Shape of Galactic Cosmic Rays: Modeling and Implications on Diffusive Gamma-Ray Emission

Key Points

A persistent discrepancy exists between predicted gamma-ray flux and LHAASO observations, challenging current models.
The cosmic-ray proton flux measured by LHAASO overshoots the Galactic gamma-ray emission observed in the TeV-PeV sky.
Updated modeling of hadronic gamma-ray production indicates issues with normalization and spectral shape.
The findings imply a need for significant revisions in the understanding of cosmic ray behavior in the Galaxy.

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.

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Cite This Study

Castro et al. (Tue,) studied this question.

synapsesocial.com/papers/68d6cd5bb1249cec298b3173 https://doi.org/https://doi.org/10.22323/1.501.0640

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