902 citations · 1.9k across the 46 of their papers we have counts for
37 papers · 1 filter
Probing Dark Photon Dark Matter with CTAO
Júlia G. Mamprim, Aion Viana, Vitor de Souza
The dark photon is a hypothetical gauge boson arising in extensions of the Standard Model, and has emerged as a compelling dark matter candidate. As dark photon dark matter (DPDM),…
Search for UHE neutrinos from GRBs with the Pierre Auger Observatory
Yago Lema-Capeans
We report on the search for ultra-high-energy neutrinos from the prompt emission of gamma-ray bursts (GRBs) using Surface Detector (SD) data from Phase I of the Pierre Auger Observ…
Recent advances on multimessenger astrophysics: Centaurus A, GW 170817, and KM3-230213A
Cainã de Oliveira, Vitor de Souza
We review recent advances in multimessenger astrophysics, with particular emphasis on Centaurus A and on two pivotal events: the gravitational-wave detection GW 170817 and the ultr…
New full-sky studies of the distribution of ultra-high-energy cosmic-ray arrival directions
A. Gálvez Ureña, L. Anchordoqui, M. Bianciotto +17
Ground-based full-sky studies of the angular distribution of arrival directions of ultra-high-energy cosmic rays require combining data from different observatories, such as the Pi…
Study of solar activity with AERA at the Pierre Auger Observatory
R. M. de Almeida
Solar activity events release vast amounts of energy, including radio waves, X-rays, ultraviolet radiation, and energetic particles, which interact with the ionosphere of the Earth…
Effects of Lorentz invariance violation on charged particles and photon production in astrophysical sources
Matheus Duarte, Vitor de Souza
We investigate the impact of Lorentz invariance violation (LIV) on radiation processes in astrophysical sources, focusing on synchrotron and inverse Compton interactions. We derive…
Measuring the muon content of inclined air showers using AERA and the water-Cherenkov detectors of the Pierre Auger Observatory
The Pierre Auger Collaboration, A. Abdul Halim, P. Abreu +360
We present a novel approach for assessing the muon content of air showers with large zenith angles on a combined analysis of their radio emission and particle footprint. We use the…
The origin of the very-high-energy radiation along the jet of Centaurus A
Cainã de Oliveira, James H. Matthews, Vitor de Souza
As the closest known active galactic nucleus, Centaurus A (Cen A) provides a rich environment for astrophysical exploration. It has been observed across wavelengths from radio to g…
Investigating the effect of hadronic models on IACT images
Benedetta Bruno, Rodrigo Guedes Lang, Luan Bonneau Arbeletche +2
The predictions of hadronic interaction models for cosmic-ray induced air showers contain inherent uncertainties due to limitations of available accelerator data. This leads to dif…
Fermi acceleration under Lorentz invariance violation
Matheus Duarte, Vitor de Souza
In this paper, the acceleration of particles in astrophysical sources by the Fermi mechanism is revisited under the assumption of Lorentz invariance violation (LIV). We calculate t…
Prospects for the detection of Dark Matter with Long-lived Mediators in the Sun using the Southern Wide-field Gamma-ray Observatory
Micael Andrade, Juan Fagiani, Clarissa Siqueira +2
The operation of the next generation of gamma-ray observatories will lead to a great advance in dark matter searches. In this paper, we use the hidden sectors hypothesis within the…
Chasing Gravitational Waves with the Cherenkov Telescope Array
Jarred Gershon Green, Alessandro Carosi, Lara Nava +563
The detection of gravitational waves from a binary neutron star merger by Advanced LIGO and Advanced Virgo (GW170817), along with the discovery of the electromagnetic counterparts…
Variability studies of active galactic nuclei from the long-term monitoring program with the Cherenkov Telescope Array
Guillaume Grolleron, Josefa Becerra González, Jonathan Biteau +13
Blazars are active galactic nuclei (AGN) with a relativistic jet oriented toward the observer. This jet is composed of accelerated particles which can display emission over the ent…
Dark matter searches in dwarf spheroidal galaxies with the Cherenkov Telescope Array
Francesco Gabriele Saturni, Michele Doro, Aldo Morselli +1
Dark matter (DM) is one of the major components in the Universe. However, at present its existence is still only inferred through indirect astronomical observations. DM particles c…
Revisiting the implications of Liouville's theorem to the anisotropy of cosmic rays
Cainã de Oliveira, Leonardo Paulo Maia, Vitor de Souza
We present a solution to Liouville's equation for an ensemble of charged particles propagating in magnetic fields. The solution is presented using an expansion in spherical harmoni…
Cosmological implications of photon-flux upper limits at ultra-high energies in scenarios of Planckian-interacting massive particles for dark matter
The Pierre Auger Collaboration, P. Abreu, M. Aglietta +374
Using the data of the Pierre Auger Observatory, we report on a search for signatures that would be suggestive of super-heavy particles decaying in the Galactic halo. From the lack…
Investigating Hadronic Interactions at Ultra-High Energies with the Pierre Auger Observatory
Isabel Goos, :, P. Abreu +374
The development of an extensive air shower depends not only on the nature of the primary ultra-high-energy cosmic ray but also on the properties of the hadronic interactions. For e…
Uncertainties in measuring the dark matter signal from Milky Way satellites using Cherenkov telescopes
Maria Kherlakian, Aion Viana, Vitor de Souza
In this work, we present a modelling of the galactic sub-clumps based on statistical estimations of the full Milky Way satellite population. We introduce 10 substructure modellings…
Limits to gauge coupling in the dark sector set by the non-observation of instanton-induced decay of Super-Heavy Dark Matter in the Pierre Auger Observatory data
The Pierre Auger Collaboration, P. Abreu, M. Aglietta +374
Instantons, which are non-perturbative solutions to Yang-Mills equations, provide a signal for the occurrence of quantum tunneling between distinct classes of vacua. They can give…
Magnetically Induced Anisotropies in the Arrival Directions of Ultra-high-energy Cosmic Rays from Nearby Radio Galaxies
Cainã de Oliveira, Vitor de Souza
Detailed simulations of the arrival directions of ultra-high energy cosmic rays are performed under the assumption of strong and structured extragalactic magnetic field (EGMF) mode…
The energy spectrum of cosmic rays beyond the turn-down around eV as measured with the surface detector of the Pierre Auger Observatory
The Pierre Auger Collaboration, P. Abreu, M. Aglietta +374
We present a measurement of the cosmic-ray spectrum above 100\,PeV using the part of the surface detector of the Pierre Auger Observatory that has a spacing of 750~m. An inflection…
Cosmic-ray anisotropies in right ascension measured by the Pierre Auger Observatory
The Pierre Auger Collaboration, A. Aab, P. Abreu +373
We present measurements of the large-scale cosmic-ray anisotropies in right ascension, using data collected by the surface detector array of the Pierre Auger Observatory over more…
Probing the origin of ultra-high-energy cosmic rays with neutrinos in the EeV energy range using the Pierre Auger Observatory
The Pierre Auger Collaboration, A. Aab, P. Abreu +389
Neutrinos with energies above eV are detectable with the Surface Detector Array of the Pierre Auger Observatory. The identification is efficiently performed for neutrinos…
Searching for Dark Matter in the Galactic Halo with a Wide Field of View TeV Gamma-ray Observatory in the Southern Hemisphere
Aion Viana, Harm Schoorlemmer, Andrea Albert +3
Despite mounting evidence that dark matter (DM) exists in the Universe, its fundamental nature remains unknown. We present sensitivity estimates to detect DM particles with a futur…