Understanding the origin and nature of ultra-high energy cosmic rays has been one of the driving forces of the field of astroparticle physics. A key piece of information is what type of particles cosmic rays consist of.
November 2023 - We are very happy to announce the election of our new spokespersons Antonella Castellina and Markus Roth at the recent collaboration meeting of the Pierre Auger Observatory.
For the first time, the possible appearance of ultra-high energy photons from merging compact objects such as black holes was tested.
The energy spectrum and mass composition data from the Pierre Auger Observatory constrain the source properties.