A5092552705- Astrophysics and Cosmic Phenomena
- Dark Matter and Cosmic Phenomena
- Neutrino Physics Research
- Particle physics theoretical and experimental studies
- Radio Astronomy Observations and Technology
- Ionosphere and magnetosphere dynamics
- Radiation Therapy and Dosimetry
- Atmospheric and Environmental Gas Dynamics
- High-Energy Particle Collisions Research
- Particle Detector Development and Performance
- Astronomical Observations and Instrumentation
- Radio, Podcasts, and Digital Media
- Cosmology and Gravitation Theories
- Gamma-ray bursts and supernovae
- Earthquake Detection and Analysis
- Atmospheric Ozone and Climate
Czech Academy of Sciences, Institute of Physics
2023-2025
University of New Hampshire
2023
Institute of Scientific and Technical Research for Defense
2023
Consejo Nacional de Investigaciones Científicas y Técnicas
2023
Institute of Astronomy and Space Physics
2023
University of Buenos Aires
2023
Pierre Auger Observatory
2023
Universidad Nacional de La Plata
2023
Instituto de Tecnologías en Detección y Astropartículas
2023
National University of General San Martín
2023
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...
We report an investigation of the mass composition cosmic rays with energies from 3 to 100 EeV (<a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mrow><a:mn>1</a:mn><a:mtext> </a:mtext><a:mtext> </a:mtext><a:mi>EeV</a:mi><a:mo>=</a:mo><a:msup><a:mrow><a:mn>10</a:mn></a:mrow><a:mrow><a:mn>18</a:mn></a:mrow></a:msup><a:mtext> </a:mtext><a:mi>eV</a:mi></a:mrow></a:math>) using distributions depth shower maximum <c:math xmlns:c="http://www.w3.org/1998/Math/MathML"...
We test the predictions of hadronic interaction models regarding depth maximum air-shower profiles, <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>, and ground-particle signals in water-Cherenkov detectors at 1000 m from shower core, <c:math xmlns:c="http://www.w3.org/1998/Math/MathML" display="inline"><c:mi>S</c:mi><c:mo stretchy="false">(</c:mo><c:mn>1000</c:mn><c:mo stretchy="false">)</c:mo></c:math>, using...
The (AERA), part of the Pierre Auger Observatory, is currently largest array radio antenna stations deployed for detection cosmic rays, spanning an area <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mn>17</a:mn><a:mtext> </a:mtext><a:mtext> </a:mtext><a:msup><a:mrow><a:mi>km</a:mi></a:mrow><a:mn>2</a:mn></a:msup></a:math> with 153 stations. It detects emission extensive air showers produced by rays in 30–80 MHz band. Here, we report AERA measurements (<c:math...
We show, for the first time, radio measurements of depth shower maximum (<a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mrow><a:msub><a:mrow><a:mi>X</a:mi></a:mrow><a:mrow><a:mi>max</a:mi></a:mrow></a:msub></a:mrow></a:math>) air showers induced by cosmic rays that are compared to established fluorescence method at same location. Using Pierre Auger Observatory we show full compatibility between our and previously published dataset, a subset observed simultaneously...
After nearly 20 years of data-taking, the measurements made with Pierre Auger Observatory represent largest collection ultra-high-energy cosmic ray (UHECR) data so far assembled from a single instrument. Exploring this set led to deeper understanding UHECR flux and many surprises. In particular, studies aiming investigate leverage mass composition UHECRs have played an important role in empowering discovery. This contribution will present overview analyses primary carried out during first...
The Pierre Auger Observatory is the most sensitive instrument to detect photons with energies above <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mrow><a:mn>1</a:mn><a:msup><a:mrow><a:mn>0</a:mn></a:mrow><a:mrow><a:mn>17</a:mn></a:mrow></a:msup><a:mtext> </a:mtext><a:mtext> </a:mtext><a:mi>eV</a:mi></a:mrow></a:math>. It measures extensive air showers generated by ultrahigh energy cosmic rays using a hybrid technique that exploits combination of fluorescence...
Abstract The Pierre Auger Collaboration has embraced the concept of open access to their research data since its foundation, with aim giving widest possible community. A gradual process release began as early 2007 when 1% cosmic-ray was made public, along 100% space-weather information. In February 2021, a portal released containing 10% collected by Observatory from 2004 2018, during first phase operation Observatory. Open Data Portal includes detailed documentation about detection and...
A dedicated search for upward-going air showers at zenith angles exceeding $110^\circ$ and energies $E>0.1$ EeV has been performed using the Fluorescence Detector of Pierre Auger Observatory. The is motivated by two "anomalous" radio pulses observed ANITA flights I III which appear inconsistent with Standard Model particle physics. Using simulations both regular cosmic ray events, a selection procedure defined to separate potential candidate events corresponding exposure calculated in energy...
Abstract Ultrahigh-energy cosmic rays are known to be mainly of extragalactic origin, and their propagation is limited by energy losses, so arrival directions expected correlate with the large-scale structure local Universe. In this work, we investigate possible presence intermediate-scale excesses in flux most energetic from direction supergalactic plane region using events energies above 20 EeV recorded surface detector array Pierre Auger Observatory up 2022 December 31, a total exposure...
Abstract Diffuse photons of energy above 0.1 PeV, produced through the interactions between cosmic rays and either interstellar matter or background radiation fields, are powerful tracers distribution in Galaxy. Furthermore, measurement a diffuse photon flux would be an important probe to test models super-heavy dark decaying into gamma-rays. In this work, we search for range 50 PeV 200 using data from Pierre Auger Observatory. For first time, combine air-shower measurements 2 km surface...
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...
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. find...
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....
The wind mission Aeolus of the European Space Agency was a groundbreaking achievement for Earth observation. Between 2018 and 2023, space-borne lidar instrument ALADIN onboard satellite measured atmospheric profiles with global coverage, which contributed to improving accuracy numerical weather prediction. precision observations, however, declined over course due progressive loss backscatter signal. analysis root cause supported by Pierre Auger Observatory in Argentina whose fluorescence...
Abstract Results are presented for the measurement of large-scale anisotropies in arrival directions ultra–high-energy cosmic rays detected at Pierre Auger Observatory during 19 yr operation, prior to AugerPrime, upgrade observatory. The 3D dipole amplitude and direction reconstructed above 4 EeV four energy bins. Besides established dipolar anisotropy R.A. 8 EeV, Fourier 8–16 bin is now also 5 σ discovery level. No time variation moment found, setting an upper limit rate change such...
Data from multiple experiments suggest that the current interaction models used in Monte Carlo simulations do not correctly reproduce hadronic interactions air showers produced by ultra-high-energy cosmic rays (UHECR), particular – but limited to production of muons during showers. We have created a large library UHECR where at highest energies are slightly modified various ways always within constraints accelerator data, without any abrupt changes with energy and assuming specific mechanism...
The surface detector (SD) of the Pierre Auger Observatory, consisting 1660 water-Cherenkov detectors (WCDs), covers 3000 km$^2$ in Argentinian pampa. Thanks to high efficiency WCDs detecting gamma rays, it represents a unique instrument for studying downward Terrestrial Gamma-ray Flashes (TGFs) over large area. Peculiar events, likely related TGFs, were detected at Observatory. Their experimental signature and time evolution are very different from those shower produced by an...
Various hints for anisotropies in the distribution of arrival directions ultra-high-energy cosmic rays (UHECRs) have been reported. Still, our poor knowledge about intergalactic and Galactic magnetic fields UHECR mass composition makes it non-trivial to interpret such results terms possible models sources. In this work, we apply same analyses that performed on Pierre Auger Observatory Telescope Array data a variety Monte Carlo simulations generated according many different combinations...
We report an investigation of the mass composition cosmic rays with energies from 3 to 100 EeV (1 EeV=$10^{18}$ eV) using distributions depth shower maximum $X_\mathrm{max}$. The analysis relies on ${\sim}50,000$ events recorded by Surface Detector Pierre Auger Observatory and a deep-learning-based reconstruction algorithm. Above 5 EeV, data set offers 10-fold increase in statistics respect fluorescence measurements at Observatory. After cross-calibration Fluorescence Detector, this enables...
The Pierre Auger Observatory is the most sensitive instrument to detect photons with energies above $10^{17}$ eV. It measures extensive air showers generated by ultra high energy cosmic rays using a hybrid technique that exploits combination of fluorescence detector ground array particle detectors. signatures photon-induced shower are larger atmospheric depth maximum ($X_{max}$) and steeper lateral distribution function, along lower number muons respect bulk hadron-induced cascades. In this...
Abstract Operating since 2004, the Pierre Auger Observatory has led to major advances in our understanding of ultra-high-energy cosmic rays. The latest findings have revealed new insights that upgrade Observatory, with primary goal obtaining information on mass most energetic rays a shower-by-shower basis. In framework upgrade, called AugerPrime, 1660 water-Cherenkov detectors surface array are equipped plastic scintillators and radio antennas, allowing us enhance composition sensitivity. To...
We show, for the first time, radio measurements of depth shower maximum ($X_\text{max}$) air showers induced by cosmic rays that are compared to established fluorescence method at same location. Using Pierre Auger Observatory we show full compatibility between our and previously published data set, a subset observed simultaneously with both techniques, measurement setup unique Observatory. Furthermore, $X_\text{max}$ resolution as function energy demonstrate ability make competitive...