The Pierre Auger Observatory: Results on Ultra-High Energy Cosmic Rays

TL;DR

This paper reports recent findings from the Pierre Auger Observatory on ultra-high energy cosmic rays, including energy spectrum, composition, flux limits, and anisotropy, along with future plans for a Northern Observatory.

Contribution

It provides the latest observational results and performance details of the Pierre Auger Observatory, advancing understanding of ultra-high energy cosmic rays.

Findings

Energy spectrum measurements

Limits on photon and neutrino fluxes

Anisotropic distribution of cosmic ray arrival directions

Abstract

The focus of this article is on recent results on ultra-high energy cosmic rays obtained with the Pierre Auger Observatory. The world's largest instrument of this type and its performance are described. The observations presented here include the energy spectrum, the primary particle composition, limits on the fluxes of photons and neutrinos and a discussion of the anisotropic distribution of the arrival directions of the most energetic particles. Finally, plans for the construction of a Northern Auger Observatory in Colorado, USA, are discussed.