Bjarni Pont
A5055307267- Astrophysics and Cosmic Phenomena
- Dark Matter and Cosmic Phenomena
- Neutrino Physics Research
- Radio Astronomy Observations and Technology
- Particle physics theoretical and experimental studies
- Particle Detector Development and Performance
- Gamma-ray bursts and supernovae
- Atmospheric Ozone and Climate
- Ionosphere and magnetosphere dynamics
- History and Developments in Astronomy
- Pulsars and Gravitational Waves Research
- Atmospheric aerosols and clouds
- Cosmology and Gravitation Theories
- High-Energy Particle Collisions Research
- Solar and Space Plasma Dynamics
- Calibration and Measurement Techniques
- Radiation Therapy and Dosimetry
- Particle Accelerators and Free-Electron Lasers
- Astronomical Observations and Instrumentation
- Lightning and Electromagnetic Phenomena
- Atmospheric and Environmental Gas Dynamics
- Radiation Detection and Scintillator Technologies
- Noncommutative and Quantum Gravity Theories
- Precipitation Measurement and Analysis
- Earthquake Detection and Analysis
Radboud University Nijmegen
2018-2024
Harvard University Press
2024
Institute of Astronomy and Space Physics
2021-2023
Consejo Nacional de Investigaciones Científicas y Técnicas
2021-2023
Universidad Nacional de La Plata
2021-2023
University of Buenos Aires
2021-2023
Instituto de Tecnologías en Detección y Astropartículas
2021-2023
National University of General San Martín
2021-2023
National Technological University
2021-2023
Pierre Auger Observatory
2021-2023
After a successful kick-off meeting in 2021. two workshops 2022 and 2023 on the future Global Cosmic-Ray Observatory (GCOS) focused mainly straw man design of detector science possibilities for astro- particle physics. About 100 participants gathered in-person hybrid panel discussions. In this report, we summarize these discussions, present preliminary straw-man GCOS collect short write-ups flash talks given during focus sessions.
High-energy cosmic rays impinging on the atmosphere of Earth induce cascades secondary particles, extensive air showers. Many particles in showers are electrons and positrons, which due to interactions with magnetic field emit radiation frequencies several tens MHz. In last years, huge progress has been made measuring characteristics through their radio signal at these frequencies. The technique is now routinely applied measure properties rays, such as arrival direction, energy, particle...
We report a measurement of the energy spectrum cosmic rays above $2.5{\times} 10^{18}$ eV based on $215,030$ events. New results are presented: at about $1.3{\times} 10^{19}$ eV, spectral index changes from $2.51 \pm 0.03 \textrm{ (stat.)} 0.05 (sys.)}$ to $3.05 (stat.)}\pm 0.10\textrm{ (sys.)}$, evolving $5.1\pm0.3\textrm{ 0.1\textrm{ beyond $5{\times} while no significant dependence features declination is seen in accessible range. These can be reproduced models with energy-dependent mass...
The Global Cosmic-ray Observatory (GCOS) is a proposed large-scale observatory for studying ultra-high-energy cosmic particles, including rays (UHECRs), photons, and neutrinos. Its primary goal to characterise the properties of highest-energy particles in Nature with unprecedented accuracy, identify their elusive sources. With an aperture at least ten-fold larger than existing observatories, this next-generation facility should start operating after 2030, when present-day detectors will...
Abstract The cytoskeleton is composed of F-actin, microtubules, and intermediate filaments (IFs). Vimentin the most ubiquitous IF. It involved in wound healing, tissue fibrosis cancer metastasis, all which require rapid vimentin assembly. In this paper, we report that un-polymerized forms liquid condensates appear to enable filament growth. Given transient nature these droplets, focus on properties vimentin-Y117L, a mutant does not form filaments, enabling us study droplets detail. They...
The Auger Engineering Radio Array (AERA), as part of the Pierre Observatory, is an array radio antennas probing nature ultra-high energy cosmic rays at energies around transition from Galactic to extra-galactic origin. It measures MHz emission extensive air showers produced by hitting our atmosphere. elemental composition a crucial piece information in determining what sources are and how accelerated. This can be obtained mass-sensitive parameter X max , depth shower maximum. We reconstruct...
The Auger Engineering Radio Array (AERA) is currently the largest array of radio antennas for detection cosmic rays, spanning an area $17$ km$^2$ with 153 antennas, measuring in energy range from $10^{17.0}$ to $10^{19.0}$ eV. It detects emission extensive air showers produced by rays $30-80$ MHz band. cosmic-ray mass composition a crucial piece information determining sources and their acceleration mechanisms. depth shower maximum, $X_{max}$, probe can be determined likelihood analysis that...
As part of the US "Snowmass" community planning exercise, UHECR has come together to write a comprehensive white paper discussing recent progress and open questions field, as they relate overarching goals particle astroparticle physics. The document outlines strategies recommendations for answering these over next two decades. It also proposes an integrated timeline, which considers expected be achieved by upgraded Pierre Auger Observatory Telescope Array experiment in this decade, need set...
In recent years CubeSats have been revolutionizing research in space, enabling low-budget, small-scale, and fast-development of projects. The Rocket Experiments for University Students (REXUS) program provides students from higher education opportunities to perform their scientific technological experiments on a sounding rocket launching space. A compact cosmic-ray detector, build CubeSat specifications, has designed detect light produced scintillating material when cosmic rays pass through....
The PR3 (Payload for Radio-interferometry and Radiation measurement on Rockets) payload was designed for, flown on, the REXUS 25 rocket performed two experiments inside a single module.1 first experiment uses radio-interferometry to precisely localize sounding during flight. An accuracy in range of 10 cm expected with an update rate 1 kHz. In order achieve this, three antennas mounted outside module transmit unmodulated carrier signals at distinct wavelengths around 70 cm. These are received...
The Auger Engineering Radio Array (AERA) is an array of $153$ radio antennas spanning area $17$ km$^2$, currently the largest its kind, that probes nature ultra-high energy cosmic rays at energies around transition from Galactic to extra-galactic origin. It measures MHz emission extensive air showers produced by hitting our atmosphere. elemental composition a crucial piece information in determining what sources are and how accelerated. This can be obtained mass-sensitive parameter...
The Auger Engineering Radio Array (AERA), as part of the Pierre Observatory, is an array $153$ radio antennas spanning area $17$ km$^2$, currently largest its kind, that probes nature ultra-high-energy cosmic rays at energies around transition from Galactic to extra-galactic origin. It measures MHz emission extensive air showers produced by hitting our atmosphere. We show recent work AERA, such measurement muon content inclined and stability measured signal over almost a decade, with...