P. L. Ghia

Radio Measurements of the Depth of Air-Shower Maximum at the Pierre Auger Observatory

P. Abreu, M. Aglietta, I. Allekotte, A. Almela et autres

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 rays, spanning an area of $17$ km$^2$ with 153 radio stations. It detects the radio …

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Investigating Hadronic Interactions at Ultra-High Energies with the Pierre Auger Observatory

Isabel Goos, P. Abreu, M. Aglietta, Justin M. Albury et autres

The development of an extensive air shower depends not only on the nature of the primary ultra-high-energy cosmic ray but also on the properties of the hadronic interactions. For energies above those achievable in human-made accelerators, hadronic interactions are only accessible through …

Measurement of the Fluctuations in the Number of Muons in Extensive Air Showers with the Pierre Auger Observatory

A. Aab, P. Abreu, M. Aglietta, Justin M. Albury et autres

We present the first measurement of the fluctuations in the number of muons in extensive air showers produced by ultrahigh energy cosmic rays. We find that the measured fluctuations are in good agreement with predictions from air shower simulations. This observation provides …

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Measurement of the cosmic-ray energy spectrum above 2.5 × 10 18 eV using the Pierre Auger Observatory

A. Aab, P. Abreu, M. Aglietta, Justin M. Albury et autres

Contains fulltext : 222424.pdf (Publisher’s version ) (Open Access)

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Cosmic-Ray Anisotropies in Right Ascension Measured by the Pierre Auger Observatory

A. Aab, P. Abreu, M. Aglietta, I. F. M. Albuquerque et autres

Abstract We present measurements of the large-scale cosmic-ray (CR) anisotropies in R.A., using data collected by the surface detector array of the Pierre Auger Observatory over more than 14 yr. We determine the equatorial dipole component, , through a Fourier analysis in …

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Inferences on mass composition and tests of hadronic interactions from 0.3 to 100 EeV using the water-Cherenkov detectors of the Pierre Auger Observatory

A. Aab, P. Abreu, M. Aglietta, Imen Al Samarai et autres

We present a new method for probing the hadronic interaction models at ultrahigh energy and extracting details about mass composition. This is done using the time profiles of the signals recorded with the water-Cherenkov detectors of the Pierre Auger Observatory. The profiles …

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