Surprises from extragalactic propagation of UHECRs

TL;DR

This paper discusses unexpected features observed in the propagation of ultra-high energy cosmic rays through extragalactic space, which are crucial for identifying their sources.

Contribution

It reveals unforeseen phenomena in UHECR propagation that impact source identification and interpretation of observational data.

Findings

Unforeseen features in cosmic ray propagation identified

Implications for source identification clarified

Enhanced understanding of GZK region effects

Abstract

Ultra-high energy cosmic ray experimental data are now of very good statistical significance even in the region of the expected GZK feature. The identification of their sources requires sophisticate analysis of their propagation in the extragalactic space. When looking at the details of this propagation some unforeseen features emerge. We will discuss some of these "surprises".