The origin of the ultra high energy cosmic rays is still under debate. Although observational data indicate that the arrival direction of UHECRs is coincident
with starburst galaxies and Active Galactic Nuclei (AGN), the former do not have enough power to accelerate particles up to ultra high energies. On the other hand, recent theoretical advances indicate that backflows in the termination region of AGN jets can accelerate particles up to the Hillas limit. In addition, the interaction of stars with the AGN jet can serve as an effective mechanism for the jet mass loading; needed to explain the heavy composition of UHECRs as indicated by Pierre Auger data.
In the present contribution we review these results and present our future perspectives.
Volume 444 -
38th International Cosmic Ray Conference (ICRC2023) -
Cosmic-Ray Physics (Indirect, CRI)
Acceleration of UHECRs in AGN jets and backflows
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Pre-published on:
July 25, 2023
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Abstract
DOI: https://doi.org/10.22323/1.444.0541
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Copyright owned by the author(s) under the term of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.