A5024829264- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Astrophysics and Cosmic Phenomena
- Dark Matter and Cosmic Phenomena
- Neutrino Physics Research
- Particle Detector Development and Performance
- Gamma-ray bursts and supernovae
- Radio Astronomy Observations and Technology
- Pulsars and Gravitational Waves Research
- Cosmology and Gravitation Theories
- Nuclear reactor physics and engineering
- Particle Accelerators and Free-Electron Lasers
- Radiation Detection and Scintillator Technologies
- Atmospheric Ozone and Climate
- Ionosphere and magnetosphere dynamics
- Astrophysical Phenomena and Observations
- Solar and Space Plasma Dynamics
- Computational Physics and Python Applications
- Astronomical Observations and Instrumentation
- Radiation Therapy and Dosimetry
- Photocathodes and Microchannel Plates
- Noncommutative and Quantum Gravity Theories
- History and Developments in Astronomy
- Particle accelerators and beam dynamics
Universidad Nacional Autónoma de México
2016-2025
A. Alikhanyan National Laboratory
2015-2024
University of Bergen
2016-2024
European Organization for Nuclear Research
2023-2024
Comisión Nacional de Energía Atómica
2011-2023
Institute of Astronomy and Space Physics
2011-2023
Consejo Nacional de Investigaciones Científicas y Técnicas
2010-2023
Universidad Nacional de La Plata
2011-2023
University of Buenos Aires
2011-2023
Instituto de Tecnologías en Detección y Astropartículas
2016-2023
Exotic origin for cosmic positrons Several cosmic-ray detectors have found more arriving at Earth than expected. Some researchers interpret this as a signature of exotic physics, such the annihilation dark matter particles. Others prefer mundane explanation that involves positron generation pulsars followed by diffusion to Earth. Abeysekara et al. detected extended emission gamma rays around two nearby pulsars, generated high-energy electrons and positrons. The size was used calculate how...
The Crab Nebula is the brightest TeV gamma-ray source in sky and has been used for past 25 years as a reference astronomy, calibration verification of new instruments. High Altitude Water Cherenkov Observatory (HAWC), completed early 2015, to observe at high significance across nearly full spectrum energies which HAWC sensitive. unique its wide field-of-view, 2 sr any instant, high-energy reach, up 100 TeV. HAWC's sensitivity improves with energy. Above $\sim$1 driven by best background...
We present the first catalog of TeV gamma-ray sources realized with recently completed High Altitude Water Cherenkov Observatory (HAWC). It is most sensitive wide field-of-view telescope currently in operation, a 1-year survey sensitivity ~5-10% flux Crab Nebula. With an instantaneous field view >1.5 sr and >90% duty cycle, it continuously surveys monitors sky for gamma ray energies between hundreds GeV tens TeV. HAWC located Mexico at latitude 19 degree North was March 2015. Here, we 2HWC...
We present the first catalog of gamma-ray sources emitting above 56 and 100 TeV with data from High Altitude Water Cherenkov (HAWC) Observatory, a wide field-of-view observatory capable detecting gamma rays up to few hundred TeV. Nine are observed TeV, all which likely Galactic in origin. Three continue past making this highest-energy source date. report integral flux each these objects. also spectra for three discuss possibility that they PeVatrons.
Abstract We present TeV gamma-ray observations of the Crab Nebula, standard reference source in ground-based astronomy, using data from High Altitude Water Cherenkov (HAWC) Gamma-Ray Observatory. In this analysis we use two independent energy estimation methods that utilize extensive air shower variables such as core position, angle, and lateral distribution. contrast, previously published HAWC spectrum roughly estimated with only number photomultipliers triggered. This new methodology...
Abstract The High Altitude Water Cherenkov (HAWC) gamma-ray observatory is a wide field of view sensitive to 500 GeV–100 TeV gamma-rays and cosmic rays. It can also perform diverse indirect searches for dark matter annihilation decay. Among the most promising targets detection are dwarf spheroidal galaxies. These objects expected have few astrophysical sources but high content, making them ideal candidates an with gamma-rays. Here we present individual limits on cross section decay lifetime...
The High-Altitude Water Cherenkov (HAWC) Observatory is sensitive to gamma rays and charged cosmic at TeV energies.The detector still under construction, but data acquisition with the partially deployed started in 2013.An analysis of cosmic-ray arrival direction distribution based on 4.9 × 10 events recorded between June 2013 February 2014 shows anisotropy -4 level angular scales about • .The HAWC sky map exhibits three regions significantly enhanced flux; two these were first reported by...
Abstract Galactic gamma-ray diffuse emission (GDE) is emitted by cosmic rays (CRs), ultra-relativistic protons, and electrons, interacting with gas electromagnetic radiation fields in the interstellar medium. Here we present analysis of teraelectronvolt from a region plane over range longitude l ∈ [43°, 73°], using data collected High Altitude Water Cherenkov (HAWC) detector. Spectral, longitudinal, latitudinal distributions are shown. The spectrum compatible arising CR population an index...
The HAWC experiment reports the first ground-based measurement of all-particle cosmic-ray spectrum in 10-500 TeV energy range. This data overlaps with direct measurements made by balloon-borne detectors as well those other higher air-shower detectors. closes an important gap between these different experiments.
Abstract We present the first full-sky analysis of cosmic ray arrival direction distribution with data collected by High-Altitude Water Cherenkov and IceCube observatories in northern southern hemispheres at same median primary particle energy 10 TeV. The combined sky map angular power spectrum largely eliminate biases that result from partial coverage a key to probe into propagation properties TeV rays through our local interstellar medium interaction between heliospheric magnetic fields....
Abstract We present the detection of very-high-energy gamma-ray emission above 100 TeV from HAWC J2227+610 with High-Altitude Water Cherenov Gamma-Ray Observatory (HAWC) observatory. Combining our observations previously published results by Very Energetic Radiation Imaging Telescope Array System (VERTIAS), we interpret as protons a lower limit in their cutoff energy 800 TeV. The most likely source is associated supernova remnant G106.3+2.7, making it good candidate for Galactic PeVatron....
Because of the high energies and long distances to sources, astrophysical observations provide a unique opportunity test possible signatures Lorentz invariance violation (LIV). Superluminal LIV enables decay photons at energy. The altitude water Cherenkov (HAWC) observatory is among most sensitive gamma-ray instruments currently operating above 10 TeV. HAWC finds evidence 100 TeV photon emission from least four sources. These exclude, for strongest limits set, energy scale 2.2×10^{31} eV,...
We analyze the Sun as a source for indirect detection of dark matter through search gamma rays from solar disk. Capture by elastic interactions with nuclei followed annihilation to long-lived mediators can produce detectable gamma-ray flux. three years data High Altitude Water Cherenkov Observatory and find no statistically significant TeV emission Sun. Using this, we constrain spin-dependent scattering cross section protons masses above 1 TeV, assuming an unstable mediator favorable...
Abstract The Earth is bombarded by ultrarelativistic particles, known as cosmic rays (CRs). CRs with energies up to a few PeV (=10 15 eV), the knee in particle spectrum, are believed have Galactic origin. One or more factories of CRs, PeVatrons, must thus be active within our Galaxy. direct detection protons from their sources not possible since they deflected magnetic fields. Hundred TeV γ -rays decaying π 0 , produced when collide ambient gas, can provide decisive evidence proton...
We report the first detection of a TeV γ-ray flux from solar disk (6.3σ), based on 6.1 years data High Altitude Water Cherenkov (HAWC) observatory. The 0.5–2.6 spectrum is well fit by power law, dN/dE=A(E/1 TeV)−γ, with A=(1.6±0.3)×10−12 TeV−1 cm−2 s−1 and γ=3.62±0.14. shows strong indication anticorrelation activity. These results extend bright, hard GeV emission observed Fermi-LAT, seemingly due to hadronic Galactic cosmic rays showering nuclei in atmosphere. However, current theoretical...
Abstract We report an observation of ultrahigh-energy (UHE) gamma rays from the Galactic center (GC) region, using 7 yr data collected by High-Altitude Water Cherenkov (HAWC) Observatory. The HAWC are best described as a point-like source (HAWC J1746-2856) with power-law spectrum ( <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mi mathvariant="italic">d</mml:mi> <mml:mi>N</mml:mi> <mml:mrow> <mml:mo stretchy="true">/</mml:mo> </mml:mrow> <mml:mi>E</mml:mi>...
We present results from daily monitoring of gamma rays in the energy range $\sim0.5$ to $\sim100$ TeV with first 17 months data High Altitude Water Cherenkov (HAWC) Observatory. Its wide field view 2 steradians and duty cycle $>95$% are unique features compared other observatories that allow us observe every source transits over HAWC for up $\sim6$ hours each sidereal day. This regular sampling yields unprecedented light curves unbiased measurements independent seasons or weather conditions....
Abstract The highest-energy known gamma-ray sources are all located within 0.°5 of extremely powerful pulsars. This raises the question whether ultra-high-energy (UHE; >56 TeV) emission is a universal feature expected near pulsars with high spin-down power. Using four years data from High Altitude Water Cherenkov Gamma-Ray Observatory, we present joint-likelihood analysis 10 to search for subthreshold UHE correlated these locations. We report significant detection (>3 σ ), indicating...