Accès ouvert
2025
article
OpenAlex
Pierre Auger Collaboration, Adila Abdul Halim, Pedro Abreu, Marco Aglietta et autres
Ultra-high-energy photons have long been sought as tracers of the most energetic processes in the Universe. Several sources can contribute to a diffuse photon flux, including interactions of cosmic rays with Galactic matter and radiation fields, as well as more exotic scenarios …
Accès ouvert
2025
article
OpenAlex
Pierre Auger Collaboration, Adila Abdul Halim, Pedro Abreu, Marco Aglietta et autres
We fit the cosmic-ray spectrum measured with the Pierre Auger Observatory's surface detectors above an energy of 10$^{17}$ eV, along with composition information inferred from the depth of shower maximum measured with its fluorescence detectors above an energy threshold of 10$^{17.8}$ eV. …
Accès ouvert
2025
article
OpenAlex
Pierre Auger Collaboration, Adila Abdul Halim, Pedro Abreu, Marco Aglietta et autres
The Pierre Auger Observatory has the capability to identify neutrino-induced extensive air showers above 10$^{17}$ eV by using its large Surface Detector (SD) array. Data from the Observatory have been used to set some of the most stringent upper limits to the …
Accès ouvert
2025
article
OpenAlex
Pierre Auger Collaboration, Adila Abdul Halim, Pedro Abreu, Marco Aglietta et autres
The accurate determination of the absolute energy scale in cosmic ray measurements is both a challenging and fundamentally important task. We present how measurements of radio pulses from extensive air showers with the Auger Engineering Radio Array, combined with per-event simulations of …
Accès ouvert
2025
article
OpenAlex
Pierre Auger Collaboration, Adila Abdul Halim, Pedro Abreu, Marco Aglietta et autres
The Auger Engineering Radio Array (AERA) consists of 153 autonomous antenna stations deployed over 17 km² to measure the radio emission from extensive air showers initiated by cosmic rays with energies between 0.1 and 10 EeV in the 30 to 80 MHz …
Accès ouvert
2025
article
OpenAlex
Pierre Auger Collaboration, Adila Abdul Halim, Pedro Abreu, Marco Aglietta et autres
The Pierre Auger Observatory is the world’s largest facility dedicated to studying ultra-high-energy cosmic rays (UHECRs). Located in Argentina, it spans 3,000 square kilometers and utilizes a hybrid detection system comprising over 1,600 Water-Cherenkov detectors and fluorescence telescopes. Since its inception in …
Accès ouvert
2025
article
OpenAlex
Pierre Auger Collaboration, Adila Abdul Halim, Pedro Abreu, Marco Aglietta et autres
The large-scale dipolar structure in the arrival directions of ultra-high-energy cosmic rays with energies above 8EeV observed by the Pierre Auger Collaboration is a well-established anisotropy measurement. This anisotropy is understood to be of extragalactic origin, as the maximum of the dipolar …
Accès ouvert
2025
article
OpenAlex
Pierre Auger Collaboration, Adila Abdul Halim, Pedro Abreu, Marco Aglietta et autres
Neutrons are the only neutral hadrons that remain stable over the timescale of an air-shower development. Their energy is lost only through hadronic interactions and quasi-elastic scattering, which results in their high abundance at the ground. The signals from the electromagnetic and …
Accès ouvert
2025
article
OpenAlex
Pierre Auger Collaboration, Adila Abdul Halim, Pedro Abreu, Marco Aglietta et autres
The upgrade of Pierre Auger Observatory, AugerPrime, is a multi-hybrid system designed to improve the sensitivity and precision of ultra-high-energy cosmic ray measurements. It includes scintillator detectors positioned both atop the enhanced Water-Cherenkov detectors and buried nearby for direct muon measurements, along …
Accès ouvert
2025
article
OpenAlex
Pierre Auger Collaboration, Adila Abdul Halim, Pedro Abreu, Marco Aglietta et autres
The Pierre Auger Observatory is a hybrid detector designed to observe and study ultra-high-energy particles of extraterrestrial origin. With its 27 fluorescence telescopes and over 1600 autonomously operating water-Cherenkov detectors spread over an area of 3000 km$^2$, it is world-leading in terms …
Accès ouvert
2025
article
OpenAlex
Pierre Auger Collaboration, Adila Abdul Halim, Pedro Abreu, Marco Aglietta et autres
Measuring proton-proton interaction cross-sections at center-of-mass energies above 40 TeV remains a significant challenge in particle physics. The Pierre Auger Observatory provides a unique opportunity to study the interactions at the highest energies through the distribution of the depth of maximum shower …
Accès ouvert
2025
article
OpenAlex
Pierre Auger Collaboration, Adila Abdul Halim, Pedro Abreu, Marco Aglietta et autres
The Pierre Auger Observatory has been operating in Malargüe, Province of Mendoza, western Argentina, for over two decades, significantly advancing our understanding of cosmic rays. Beyond its scientific mission, the installation and operation of the Observatory has had profound social, economic, educational …