Cen A persistence and Virgo absence versus updated maps to understand UHECR nature

TL;DR

This paper investigates the origins of Ultra High Cosmic Rays, supporting the light nuclei hypothesis through updated maps, correlations with astrophysical structures, and potential neutrino signatures, challenging the proton-dominant model.

Contribution

It provides new evidence favoring light nuclei as UHECRs and interprets recent map deviations, emphasizing the importance of multi-messenger observations for understanding their nature.

Findings

UHECRs do not follow the Super Galactic Plane map, suggesting a different origin.

Persistent clustering around Cen A and Vela supports light nuclei hypothesis.

Secondary gamma rays and neutrinos may trace UHECR sources.

Abstract

Ultra High Cosmic Rays (UHECR) should be tracing their sources, making a new astronomy. Their events counting are finally growing, by Auger experiment, into cosmic sky. Their map should follow the mass distribution in a narrow cosmic volume (the GZK cut off region, correlated with Super Galactic Plane (SPG) or Local Group) if they were protons, as most expected. Recently the last 69 UHECR did not longer follow the SGP map, opening the way to very different correlations, and extreme bending connection; we reconfirm here our Lightest Nuclei interpretation, while showing here the last event over different radio, X, Gamma and tens TeV CR maps. The Virgo Cluster absence, the persistence of UHECR clustering along Cen A, the first triplet along Vela seem to confirm light nuclei UHECR understanding, implying a very narrow Universe view, even partially of galactic origin. UHECR fragments might follow (at half, fourth of the energy) the same UHECR map with a tail or a crown clustering around main UHECR group. Also secondary gamma and UHE neutrino might trace partially those maps. Tau neutrinos at EeV or PeVs may play a role in correlating UHECR map and disentangling nucleon from nuclei nature, possibly in Auger Fluorescence Telescopes, by night horizontal up-going tau airshowers.