258 citations · 963 across the 35 of their papers we have counts for
36 papers
Observation of the Moon and Sun shadows with cosmic rays at an average energy of eV
The Pierre Auger Collaboration, A. Abdul Halim, P. Abreu +346
Interactions of cosmic rays with the Moon and the Sun produce deficits in their arrival-direction distributions relative to an isotropic flux. Such shadows have been observed previ…
Search for active-sterile neutrino transitions using Pierre Auger Observatory data
The Pierre Auger Collaboration, A. Abdul Halim, P. Abreu +348
We investigate the sensitivity of the Pierre Auger Observatory to physics beyond the Standard Model arising from magnetic-moment-induced transitions between active and heavy steril…
Proton-air interaction properties at TeV from shower-depth measurements with the Pierre Auger Observatory and their connection to the Muon Puzzle
The Pierre Auger Collaboration, A. Abdul Halim, P. Abreu +347
Hybrid measurements at the Pierre Auger Observatory indicate that most high-energy hadronic interaction models underestimate the average depth of the shower maximum, $\langle X_{\m…
Acceptability Conditions and Relativistic Anisotropic Generalized Polytropes
Daniel Suárez-Urango, J. Ospino, Héctor Hernández +1
This paper explored the physical acceptability conditions for anisotropic matter configurations in General Relativity. The study considered a generalized polytropic equation of sta…
Characterization of the muography background using the Muon Telescope (MuTe)
Jesús Peña-Rodríguez, Luis A. Núñez, Hernán Asorey
In this work, we estimate the background components in muography using the MuTe: a hybrid muon telescope composed of two subdetectors -a scintillator hodoscope and a Water Cherenko…
Systematic effects on the diversity of dwarf galaxies rotation curves
J. M. Pacheco-Arias, C. R. Carvajal-Bohorquez, Juan C. B. Pineda +1
Cosmological simulations of structure formation are invaluable to study the evolution of the Universe and the development of galaxies in it successfully reproducing many observatio…
Measurement of the fluctuations in the number of muons in extensive air showers with the Pierre Auger Observatory
The Pierre Auger Collaboration, A. Aab, P. Abreu +365
We present the first measurement of the fluctuations in the number of muons in extensive air showers produced by ultrahigh energy cosmic rays. We find that the measured fluctuation…
Characterization and on-field performance of the MuTe Silicon Photomultipliers
J. Sánchez-Villafrades, J. Peña-Rodríguez, H. Asorey +1
The Muon Telescope is a muography experiment for imaging volcanoes in Colombia. It consists of a scintillator tracking system and a water Cherenkov detector used for particle depos…
Radiating jump conditions in General Relativity
L. F Castañeda-Godoy, J. Ospino, L. A. Núñez
We present a unified description of spherical discontinuity surfaces in General Relativity based on two parameters: mass function and surface permeability. The surfaces considered…
Relativistic Anisotropic Polytropic Spheres: Physical Acceptability
D. Suárez-Urango, L. A. Núñez, H. Hernández
In this work we evaluate the physical acceptability of relativistic anisotropic spheres modeled by two polytropic equations of state -- with the same newtonian limit -- commonly us…
Physical acceptability conditions for realistic neutron star equations of state
D. Ramos-Salamanca, L. A. Núñez, J. Ospino
We select 37 most common and realistic dense matter equation of states to integrate the general relativistic stellar structure equations for static spherically symmetric matter con…
Acceptability Conditions and Relativistic Barotropic Equations of State
Héctor Hernández, Daniel Suárez-Urango, Luis A. Núñez
We sketch an algorithm to generate exact anisotropic solutions starting from a barotropic EoS and setting an ansatz on the metric functions. To illustrate the method, we use a gene…
Modeling and simulation of the R5912 photomultiplier for the LAGO project
S. Hernández-Barajas, Y. León-Carreño, J. Peña-Rodríguez +2
We present the results of modeling and simulating the Hamamatsu R5912 photomultiplier tube that is used in most of the sites of the Latin American Giant Observatory (LAGO). The mod…
Measurement of the cosmic-ray energy spectrum above eV using the Pierre Auger Observatory
The Pierre Auger Collaboration, A. Aab, P. Abreu +380
We report a measurement of the energy spectrum of cosmic rays for energies above eV based on 215,030 events recorded with zenith angles below . A k…
Impact of Global Data Assimilation System atmospheric models on astroparticle showers
Jennifer Grisales-Casadiegos, Christian Sarmiento-Cano, Luis A. Núñez +1
We present a methodology to simulate the impact of the atmospheric models in the background particle flux on ground detectors using the Global Data Assimilation System. The methodo…
Simulated Annealing for Volcano Muography
A. Vesga-Ramírez, J. D. Sanabria-Gómez, D. Sierra-Porta +5
Muography or muon radiography is a non-invasive emerging image technology relying on high energy atmospheric muons, which complements other standard geophysical tools to understand…
sPad of Super Accuracy and Geometry in Old Babylon. -- sPad de Súper Exactitud y Geometría en la Antigua Babilonia
F. Quiñonez, L. A. Núñez, F. D. Lora-Clavijo +3
Recently it has been discovered that on a stone tablet over 3800 years old, the Plimpton-322 table, are carved the geometric relations that exist between the sides of 15 right tria…
Contributions of the LAGO Collaboration to the 36th ICRC
A. Alberto, W. Alvarez, L. Ancari +90
The LAGO (Latin American Giant Observatory) observatory is an experiment that spans over Latin America in a wide range of latitudes that gives different rigidity cut offs for the e…
Calibration and first measurements of MuTe: a hybrid Muon Telescope for geological structures
Jesús Peña-Rodríguez, Adriana Vásquez-Ramírez, José D. Sanabria-Gómez +3
In this work, we describe the calibration and first measurements in the commissioning of MuTe, a hybrid Muon Telescope with two subdetectors --a scintillator hodoscope and a Water…
Radiation Dose Charts for Long Geodetic and Polar Flights with CARI-7A
F. Quiñonez, L. A. Núñez, E. A. Casallas +5
We have calculated by using CARI-7A the effective and ambient radiation doses absorbed by a reference human phantom inside aircrafts with cruise speed, and averaged ascent/descent…
Observation of inclined EeV air showers with the radio detector of the Pierre Auger Observatory
The Pierre Auger Collaboration, A. Aab, P. Abreu +392
With the Auger Engineering Radio Array (AERA) of the Pierre Auger Observatory, we have observed the radio emission from 561 extensive air showers with zenith angles between 60$^\ci…
Indication of anisotropy in arrival directions of ultra-high-energy cosmic rays through comparison to the flux pattern of extragalactic gamma-ray sources
The Pierre Auger Collaboration, A. Aab, P. Abreu +390
A new analysis of the dataset from the Pierre Auger Observatory provides evidence for anisotropy in the arrival directions of ultra-high-energy cosmic rays on an intermediate angul…
Inferences on Mass Composition and Tests of Hadronic Interactions from 0.3 to 100 EeV using the water-Cherenkov Detectors of the Pierre Auger Observatory
The Pierre Auger Collaboration, A. Aab, P. Abreu +403
We present a new method for probing the hadronic interaction models at ultra-high energy and extracting details about mass composition. This is done using the time profiles of the…
Spectral Calibration of the Fluorescence Telescopes of the Pierre Auger Observatory
The Pierre Auger Collaboration, A. Aab, P. Abreu +403
We present a novel method to measure precisely the relative spectral response of the fluorescence telescopes of the Pierre Auger Observatory. We used a portable light source based…