We present a measurement of the cosmic-ray spectrum above 100 PeV using the part of the
surface detector of the Pierre Auger Observatory that has a spacing of 750 m. An inflection of …

Cosmic rays are observed up to the astounding energies of more than 1020 eV, making
them the most energetic particles known in the universe. However, the origin of these …

We use the surface detector of the Pierre Auger Observatory to search for air showers
initiated by photons with an energy above 1019 eV. Photons in the zenith angle range from …

Using the data of the Pierre Auger Observatory, we report on a search for signatures that
would be suggestive of super-heavy particles decaying in the Galactic halo. From the lack of …

The depth of the air shower maximum 𝑋max induced by ultra-high energy cosmic rays is a
key observable to estimate the mass of primary cosmic particles (see eg [1] for a review). In …

The energy spectrum of cosmic rays extends to beyond 100EeV. Where and how these
particles, predominantly the nuclei of the common elements up to iron, are accelerated is …

The existence of ultra-high energy cosmic rays (UHECRs) is one of the most intriguing
phenomena in astroparticle physics. UHECRs are atomic nuclei with energies above 1018 …

The Auger Engineering Radio Array (AERA), part of the Pierre Auger Observatory, is
currently the largest array of radio antenna stations deployed for the detection of cosmic …

In the study of cosmic rays, the measurement of the energy spectrum of the primaries is one
of the main issues and provides fundamental information on the most energetic phenomena …

Abstract The Pierre Auger Observatory was built to study cosmic rays of the highest
energies. It is installed in the Departments of Malargüe and San Rafael in the Province of …