A5073698981- Astrophysics and Cosmic Phenomena
- Dark Matter and Cosmic Phenomena
- Neutrino Physics Research
- Particle physics theoretical and experimental studies
- Gamma-ray bursts and supernovae
- Cosmology and Gravitation Theories
- High-Energy Particle Collisions Research
- Computational Physics and Python Applications
- Pulsars and Gravitational Waves Research
Consejo Nacional de Investigaciones Científicas y Técnicas
2022-2025
Instituto de Tecnologías en Detección y Astropartículas
2022-2025
Karlsruhe Institute of Technology
2022-2025
National University of General San Martín
2022-2024
Institute of Particle Physics
2024
Abstract In this work we present the interpretation of energy spectrum and mass composition data as measured by Pierre Auger Collaboration above 6 × 10 17 eV. We use an astrophysical model with two extragalactic source populations to hardening cosmic-ray flux at around 5 18 eV (the so-called “ankle” feature) a transition between these components. find our be well reproduced if sources ankle emit mixed hard low rigidity cutoff. The component below is required have very soft mix protons...
We present measurements of the atmospheric depth shower maximum <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:msub><a:mi>X</a:mi><a:mi>max</a:mi></a:msub></a:math>, inferred for first time on an event-by-event level using surface detector Pierre Auger Observatory. Using deep learning, we were able to extend <c:math xmlns:c="http://www.w3.org/1998/Math/MathML" display="inline"><c:msub><c:mi>X</c:mi><c:mi>max</c:mi></c:msub></c:math> distributions up energies 100 EeV...
A promising energy range to look for angular correlation between cosmic rays of extragalactic origin and their sources is at the highest energies, above few tens EeV ($1\:{\rm EeV}\equiv 10^{18}\:$eV). Despite flux these particles being extremely low, area ${\sim}\:3{,}000 \: \text{km}^2$ covered Pierre Auger Observatory, 17-year data-taking period Phase 1 its operations, have enabled us measure arrival directions more than 2,600 ultra-high $32\:\text{EeV}$. We publish this data set, largest...
Ultra-high-energy photons with energies exceeding $10^{17}$ eV offer a wealth of connections to different aspects cosmic-ray astrophysics as well gamma-ray and neutrino astronomy. The recent observations in the $10^{15}$ range further motivate searches for even higher-energy photons. In this paper, we present search $2{\times}10^{17}$ using about 5.5 years hybrid data from low-energy extensions Pierre Auger Observatory. upper limits on integral photon flux derived here are most stringent...
A catalog containing details of the highest-energy cosmic rays recorded through detection extensive air-showers at Pierre Auger Observatory is presented with aim opening data to detailed examination. Descriptions 100 showers created by particles between 1 January 2004 and 31 December 2020 are given for that have energies in range 78 EeV 166 EeV. Details also a further nine very-energetic events been used calibration procedure adopted determine energy each primary. sky plot arrival directions...
Dark matter particles could be superheavy, provided their lifetime is much longer than the age of universe. Using sensitivity Pierre Auger Observatory to ultra-high energy neutrinos and photons, we constrain a specific extension Standard Model particle physics that meets requirement for superheavy by coupling it sector ultra-light sterile neutrinos. Our results show that, typical dark constant 0.1, mixing angle $\theta_m$ between active must satisfy, roughly, $\theta_m \lesssim 1.5\times...
Abstract The flux of ultra-high energy cosmic rays reaching Earth above the ankle (5 EeV) can be described as a mixture nuclei injected by extragalactic sources with very hard spectra and low rigidity cutoff. Extragalactic magnetic fields existing between closest affect observed CR spectrum reducing low-rigidity particles Earth. We perform combined fit distributions depth shower maximum measured Pierre Auger Observatory including effect this horizon in propagation UHECRs intergalactic space....
A search for time-directional coincidences of ultra-high-energy (UHE) photons above 10 EeV with gravitational wave (GW) events from the LIGO/Virgo runs O1 to O3 is conducted Pierre Auger Observatory. Due distinctive properties photon interactions and background expected hadronic showers, a subset most interesting GW selected based on their localization quality distance. Time periods 1000 s around 1 day after are analyzed. No observed. Upper limits UHE fluence event derived that typically at...
We test the predictions of hadronic interaction models regarding depth maximum air-shower profiles, $X_{max}$, and ground-particle signals in water-Cherenkov detectors at 1000 m from shower core, $S(1000)$, using data fluorescence surface Pierre Auger Observatory. The consists fitting measured two-dimensional ($S(1000)$, $X_{max}$) distributions templates for simulated air showers produced with EPOS-LHC, QGSJet II-04, Sibyll 2.3d leaving scales predicted $X_{max}$ component ground as free...
The Pierre Auger Observatory, being the largest air-shower experiment in world, offers an unprecedented exposure to neutral particles at highest energies. Since start of data taking more than 18 years ago, various searches for ultra-high-energy (UHE, $E\gtrsim10^{17}\,\text{eV}$) photons have been performed: either a diffuse flux UHE photons, point sources or associated with transient events like gravitational wave events. In present paper, we summarize these and review current results...