A5048415692- Astrophysics and Cosmic Phenomena
- Dark Matter and Cosmic Phenomena
- Neutrino Physics Research
- Particle physics theoretical and experimental studies
- Radio Astronomy Observations and Technology
- Gamma-ray bursts and supernovae
- Particle Detector Development and Performance
- Galaxies: Formation, Evolution, Phenomena
- Astrophysical Phenomena and Observations
- Pulsars and Gravitational Waves Research
- Atmospheric Ozone and Climate
- Solar and Space Plasma Dynamics
- Cosmology and Gravitation Theories
- Ionosphere and magnetosphere dynamics
- High-Energy Particle Collisions Research
- Atmospheric aerosols and clouds
- Computational Physics and Python Applications
- Radiation Detection and Scintillator Technologies
- Astronomical Observations and Instrumentation
- Noncommutative and Quantum Gravity Theories
- Lightning and Electromagnetic Phenomena
- Calibration and Measurement Techniques
- Atmospheric and Environmental Gas Dynamics
- Particle Accelerators and Free-Electron Lasers
- Precipitation Measurement and Analysis
Czech Academy of Sciences, Institute of Physics
2021-2024
Institute of Astronomy and Space Physics
2021-2023
Consejo Nacional de Investigaciones Científicas y Técnicas
2017-2023
Universidad Nacional de La Plata
2021-2023
University of Buenos Aires
2021-2023
Instituto de Tecnologías en Detección y Astropartículas
2017-2023
National University of General San Martín
2017-2023
National Technological University
2021-2023
Institute of Scientific and Technical Research for Defense
2021-2023
Pierre Auger Observatory
2021-2023
Abstract The SST-1M (webpage: https://sst-1m.space ) is a Small-Sized Telescope (SST) designed to provide cost-effective and high-performance solution for gamma-ray astrophysics, particularly energies beyond few TeV. goal integrate this telescope into an array of similar instruments, leveraging its lightweight design, earthquake resistance, established Davies-Cotton configuration. Additionally, optical system function without protective dome, allowing it withstand the harsh atmospheric...
Context. Near a dozen star-forming galaxies have been detected in gamma-rays by the Fermi observatory last decade. A remarkable property of this sample is quasi-linear relation between gamma-ray luminosity and star formation rate, obtained assuming that latter well traced infra-red galaxies. The non-linearity has not fully explained yet. Aims. We aim at determining biases derived from use infrared as proxy for shed light onto more fundamental luminosity. expect to quantify explain some...
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.
We assume an extreme scenario, in which the arriving cosmic rays are composed of only iron nuclei at energies above $10^{19.6}\,\text{eV}\simeq40\,\text{EeV}$, while allowing a freedom scale depth shower maximum ($X_{\rm{max}}$) and preserving elongation rate fluctuations $X_{\rm{max}}$ predicted by models hadronic interactions. derive shift for QGSJet II-04 Sibyll 2.3d using public data from Pierre Auger Observatory. then propose new mass-composition model energy evolution four primary...
We assume an extreme scenario, in which the arriving cosmic rays are composed of only iron nuclei at energies above 10^19.6 eV ≃ 40 EeV, while allowing a freedom scale depth shower maximum (𝑋max) and preserving elongation rate fluctuations 𝑋max predicted by models hadronic interactions. derive shift for QGSJet II-04 Sibyll 2.3d using public data from Pierre Auger Observatory. then propose new mass-composition model energy evolution four primary species ultra-high fitting publicly-available...
Starbursts are galaxies undergoing massive episodes of star formation. The combined effect stellar winds from hot stars and supernova explosions creates a high-temperature cavity in the nuclear region these objects. very gas expands adiabatically escapes galaxy creating superwind which sweeps matter galactic disk. halo is filled with multi-phase hot, warm, cool, relativistic components. shocks associated starbursts turbulent bubble inflated by them might accelerate cosmic rays up to high...
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...
Abstract The spectra of active galactic nuclei exhibit broad-emission lines that presumably originate in the broad-line region (BLR) with gaseous-dusty clouds a predominantly Keplerian motion around central black hole. Signatures both inflow and outflow are frequently seen. dynamical character BLR is consistent scenario has been branded as failed radiatively accelerated dusty outflow. In this scheme, frequent high-velocity impacts falling back onto underlying accretion disk predicted. impact...
Starburst galaxies generate large-scale winds powered by the activity in star-forming regions located galactic disks. Fragmentation of disk produced outbreak wind results formation clouds. Bowshocks caused supersonic outflow appear around such In this paper we discuss acceleration relativistic particles and production non-thermal radiation scenario. Cosmic rays accelerated at bowshocks do not reach highest energies, although high-energy luminosity generated is significant. We show that up to...
Context: Runaway stars produce bowshocks that are usually observed at infrared (IR) wavelengths. Non-thermal radio emission has been detected so far only from the bowshock of BD+43{\deg}3654, whereas detection non-thermal radiation these high energies remains elusive. Aims: We aim characterising in detail radio, X-ray, and gamma-ray stellar accounting for structure region interaction between wind its environment. Methods: develop a broadband-radiative, multi-zone model takes into account...
Active galactic nuclei are supermassive black holes surrounded by an accretion disk, two populations of clouds, bipolar jets, and a dusty torus. The clouds move in Keplerian orbits at high velocities. In particular, the broad-line region (BLR) have velocities ranging from $1000$ to $10000$ km s$^{-1}$. Given extreme proximity these hole, frequent collisions with disk should occur. impact BLR onto can produce strong shock waves where particles might be accelerated. goal this work is...
The Argentine Institute of Radio astronomy (IAR) is equipped with two single-dish 30-m radio antennas capable performing daily observations pulsars and transients in the southern hemisphere at 1.4 GHz. We aim to contribute pulsar timing studies related short time-scale interstellar scintillation searches for sources continuous gravitational waves. performed high-cadence (almost daily) long-duration bright millisecond J0437$-$4715 over a year, gathering more than 700 hours good-quality data...
High-velocity clouds (HVCs) are interstellar of atomic hydrogen that do not partake the Galactic rotation and have velocities a several hundred kilometers per second. A considerable number these falling down towards disk. HVCs form large massive complexes, so their collisions with disk must release great amount energy into medium. The cloud-disk interaction produces two shocks, one propagates through cloud other disk; properties shocks depend mainly on velocity disk-cloud density ratio. In...
The Argentine Institute of Radio astronomy (IAR) is equipped with two single-dish 30mts radio antennas capable performing daily observations pulsars and transients in the southern hemisphere at 1.4 GHz. We aim to introduce international community upgrades performed show that IAR observatory has become suitable for investigations numerous areas pulsar astronomy, such as timing arrays, targeted searches continuous gravitational waves sources, monitoring magnetars glitching pulsars, studies...
The combined effects of supernova explosions and stellar winds produce a hot bubble in the central regions starburst galaxies. As expands, it can outbreak into galactic halo driving superwind that transports gas fields to intergalactic space. We present estimates cosmic ray generation gamma-ray emission both this large-scale wind bow shocks created around embedded clouds.
Active galactic nuclei are one of the most promising sources for accelerating particles up to highest energies. In this contribution, we present a scenario in which cosmic rays accelerated multiple shocks created by interaction relativistic AGN jets with winds embedded massive stars. We solve Fokker-Planck equation considering escape and radiative losses as well collective effect reacceleration particles. Finally, calculate maximum energies that can achieve discuss possibility producing...
Radiogalaxies are the subclass of active galactic nuclei where large-scale relativistic jets detected. In this work we study acceleration particles in a multiple shock scenario produced by collision with embedded massive stars. We solve transport equation taking into account not only spatial and radiative losses but also collective effect shocks possible reacceleration, evaluate maximum energies that can achieve. Finally, compute gamma-ray emission expected discuss detection possibilities.
High-velocity clouds (HVCs) are HI with velocities of more than 100 km s−1. These do not partake the differential Galactic rotation; a significant fraction them falling down towards disk. The typical mass these is ∼ 104 M⊙, so in collision disk energies order 1051 erg can be released into interstellar medium. Such collisions should produce strong shocks propagating through both cloud and Under adequate conditions, accelerate particles up to relativistic by Fermi mechanism. In this work, we...
The combined effects of supernova explosions and stellar winds produce a hot bubble in the central regions starburst galaxies. As expands, it can outbreak into galactic halo driving superwind that transports gas fields to intergalactic space. We present estimates cosmic ray generation gamma-ray emission both this large-scale wind bow shocks created around embedded clouds.