On gamma rays as predictors of UHECR flux in AGNs
de Oliveira C, Guedes Lang R, Silva Batista P (2025)
Publication Type: Conference contribution
Publication year: 2025
Journal
Publisher: Sissa Medialab Srl
Book Volume: 484
Conference Proceedings Title: Proceedings of Science
Event location: Malargue
Abstract
Active galactic nuclei (AGNs) are significant candidates for ultra-high-energy cosmic ray (UHECR) sources, supported by both theoretical and phenomenological motivations. In this context, AGN catalogs have been employed for quantitative comparisons between predictions and observations, where the UHECR flux is assumed to be proportional to the very-high-energy γ-ray flux of the objects. However, discrepancies arise in matching the energy spectrum and anisotropy data. This work proposes a possible solution to these inconsistencies. By using the observed γ-ray flux as a proxy for the UHECR flux, a beamed UHECR emission is implicitly assumed. We show that assuming isotropic UHECR emission and applying Doppler factor corrections to the observed γ-ray flux can reduce the discrepancies between the predictions derived from AGN catalog-based models.
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Brazil (BR)How to cite
APA:
de Oliveira, C., Guedes Lang, R., & Silva Batista, P. (2025). On gamma rays as predictors of UHECR flux in AGNs. In Proceedings of Science. Malargue, AR: Sissa Medialab Srl.
MLA:
de Oliveira, Cainã, Rodrigo Guedes Lang, and Pedro Silva Batista. "On gamma rays as predictors of UHECR flux in AGNs." Proceedings of the 7th International Symposium on Ultra-High-Energy Cosmic Rays, UHECR 2024, Malargue Sissa Medialab Srl, 2025.
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