On ultra-high energy cosmic rays: origin in AGN jets and transport in expanding Universe

TL;DR

This paper models the origin and propagation of ultra-high energy cosmic rays from AGN jets, considering jet energy distribution and interactions with background radiation to predict the spectrum observed on Earth.

Contribution

It introduces a novel calculation of cosmic ray spectra from AGN jets that includes jet energy distribution and cosmic expansion effects.

Findings

Predicted cosmic ray spectrum at Earth considering interactions with background radiation.

Accounted for jet distribution on kinetic energy in cosmic ray source modeling.

Used a simple numerical code for spectrum calculation.

Abstract

The cosmic ray source spectrum produced by AGN (Active Galactic Nucleus) jets is calculated. A distinctive feature of these calculations is the account for the jet distribution on kinetic energy. The expected cosmic ray spectrum at the Earth is determined with the use of a simple numerical code which takes into account interactions of ultra-high energy protons and nuclei with the background radiation in an expanding universe.