The Pierre Auger Collaboration measured a dipolar anisotropy in the arrival-direction distribution of the cosmic rays with energies in excess of 8x1018 eV, finding that the flux is about
6.5% larger than the average in one direction of the sky and it is correspondingly smaller in the opposite direction.
Scientific Highlights
One of the biggest challenges in cosmic-ray physics is to accurately pin down the absolute energy of a measured cosmic ray.
Billions of subatomic particles can be created in cosmic-ray induced air showers.
The Auger Engineering Radio Array (AERA) measures radio properties of cosmic-ray induced air showers within the Pierre Auger Observatory.
High-energy neutrinos are thought to be excellent cosmic messengers when exploring the extreme universe.
