Fornax A, Centaurus A and other radio galaxies as sources of ultra-high energy cosmic rays

TL;DR

This paper proposes that giant-lobed radio galaxies like Centaurus A and Fornax A are likely sources of ultra-high energy cosmic rays, offering an alternative to starburst galaxies and active galactic nuclei.

Contribution

It introduces the hypothesis that giant-lobed radio galaxies are significant sources of UHECRs, challenging previous attributions to starburst galaxies.

Findings

Giant-lobed radio galaxies can explain observed UHECR anisotropies.

Centaurus A and Fornax A are plausible UHECR sources.

Supports the idea that radio galaxies contribute to ultra-high energy cosmic rays.

Abstract

The origin of ultra-high energy cosmic rays (UHECRs) is still unknown. It has recently been proposed that UHECR anisotropies can be attributed to starburst galaxies or active galactic nuclei. We suggest that the latter is more likely and that giant-lobed radio galaxies such as Centaurus A and Fornax A can explain the data.