Abstract
The study of correlations between observations of fundamentally different nature from extreme cosmic sources promises extraordinary physical insights into the Universe. With the Pierre Auger Observatory, we can significantly contribute to multi-messenger astrophysics by searching for ultra-high energy particles, particularly neutrinos and photons which, being electrically neutral, point back to their origin. Using Pierre Auger Observatory data, stringent limits at EeV energies have been established on the photon and neutrino fluxes from a large fraction of the sky, probing the production mechanisms of ultra-high energy cosmic rays. The good angular resolution and the neutrino identification capabilities of the Observatory at EeV energies allow the follow-up of events detected in gravitational waves, such as the binary mergers observed with the Advanced LIGO/Virgo detectors, or from other energetic sources of particles.
Reference55 articles.
1. The Pierre Auger Cosmic Ray Observatory
2. Aab A. et al. [Pierre Auger Collaboration], to appear in Frontiers in Physics (2019).
3. Verzi V. for the Pierre Auger Collaboration, wthese proceedings.
4. Ghia P. L. for the Pierre Auger Collaboration, these proceedings.
5. Unger M. for the Pierre Auger Collaboration, these proceedings.