Speaker
Description
Photons, gravitational waves, neutrinos and cosmic rays carry complementary information about individual cosmic sources and their populations, offering an exceptionally powerful tool for probing the properties of the Universe. In the extreme energy regime, above $10^{17}$ eV, the Pierre Auger Observatory plays a leading role in multimessenger astronomy, owing to its capability to discriminate extensive air showers initiated by ultra-high energy photons and neutrinos from those of hadronic origin. Searches for diffuse fluxes or point-like sources of neutrinos and photons enable the study of various candidate sources and allow limits to be placed on the emission of these neutral messengers from merger events associated with gravitational waves. Neutrinos and photons also open a window onto potential effects beyond the Standard Model of particle physics, such as the decay of super-heavy dark matter or the violation of Lorentz invariance.
An overview of the multimessenger activities conducted by the Pierre Auger Collaboration is presented, along with a discussion of the improvements expected from the upgraded Pierre Auger Observatory, AugerPrime.
