Eva Santos
A5084406264- 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
- Stellar, planetary, and galactic studies
- High-Energy Particle Collisions Research
- Pulsars and Gravitational Waves Research
- Atmospheric Ozone and Climate
- Astronomical Observations and Instrumentation
- Astrophysics and Star Formation Studies
- Atmospheric aerosols and clouds
- History and Developments in Astronomy
- Solar and Space Plasma Dynamics
- Ionosphere and magnetosphere dynamics
- Noncommutative and Quantum Gravity Theories
- Radiation Therapy and Dosimetry
- Calibration and Measurement Techniques
- Atmospheric and Environmental Gas Dynamics
- Astronomy and Astrophysical Research
- Astro and Planetary Science
- Radiation Detection and Scintillator Technologies
- Lightning and Electromagnetic Phenomena
Universidade de São Paulo
2015-2025
Universidade Federal da Bahia
2025
Universidade Federal do Rio Grande do Sul
2025
Southwest Bahia State University
2025
Czech Academy of Sciences, Institute of Physics
2019-2024
Universidade Estadual de Campinas (UNICAMP)
2014-2024
University of Buenos Aires
2021-2023
Consejo Nacional de Investigaciones Científicas y Técnicas
2010-2023
Instituto de Tecnologías en Detección y Astropartículas
2016-2023
National University of General San Martín
2016-2023
Introdução: o momento do parto impacta na vida da mulher e formação de vínculos manutenção cuidados instituídos ao recém-nascido este parturição traz consigo a necessidade ações abordagem humanizada pelos profissionais saúde, proporcionando maior conforto nesse processo. Objetivo: conhecer as concepções das puérperas sobre uso música no parto. Método: estudo descritivo qualitativa. Os dados foram coletados em um hospital sudoeste Bahia, com aplicação questionário semiestruturado para 12...
Data from multiple experiments suggest that the current interaction models used in Monte Carlo simulations do not correctly reproduce hadronic interactions air showers produced by ultra-high-energy cosmic rays (UHECR). We have created a large library of UHECR where at highest energies are slightly modified various ways - but always within constraints accelerator data, without any abrupt changes with energy and assuming specific mechanism or dramatically new physics ultra-high energies....
The Pierre Auger Observatory, located near the town Malargüe in province of Mendoza, Argentina, is largest cosmic-ray detector existence, covering an area 3000 km$^{2}$. upgraded Phase II operations, consists a surface array 1660 stations combining water Cherenkov, scintillator, and radio detectors. A subset also includes underground muon Additionally, fluorescence detectors at four sites overlook array. science goals for enhanced Observatory include measurement properties ultra-high-energy...
The Pierre Auger Observatory, located near the town Malarg\"ue in province of Mendoza, Argentina, is largest cosmic-ray detector existence, covering an area 3000 km2. upgraded Phase II operations, consists a surface array 1660 stations combining water Cherenkov, scintillator, and radio detectors. A subset also includes underground muon Additionally, fluorescence detectors at four sites overlook array. science goals for enhanced Observatory include measurement properties ultra-high-energy...
We present the results from spectroscopic monitoring of WR 140 (WC7pd + O5.5fc) during its latest periastron passage in 2009 January. The observational campaign consisted a constructive collaboration between amateur and professional astronomers. It took place at six locations, including Teide Observatory, Observatoire de Haute Provence, Dominion Astrophysical Observatory du Mont Mégantic. is known as archetype colliding-wind binaries it has relatively long period (8 yr) high eccentricity...
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...
During the summer of 2013, a 4-month spectroscopic campaign took place to observe variabilities in three Wolf-Rayet stars. The data have been analyzed for WR 134 (WN6b), better understand its behaviour and long-term periodicity, which we interpret as arising from corotating interaction regions (CIRs) wind. By analyzing variability He II $\lambda$5411 emission line, previously identified period was refined P = 2.255 $\pm$ 0.008 (s.d.) days. coherency time variability, associate with lifetime...
Having implemented the option to make ad-hoc modifications of cross-section, multiplicity, and elasticity hadronic interactions during development cosmic-ray showers into CORSIKA simulation package in a consistent way for both primary protons arbitrary nuclei, we can study impact these on variety observables different primaries. The are generic, without any reference specific mechanism. ranges parameters only restricted by existing experimental data from accelerators nuclear emulsions....
The Muon Ionization Cooling Experiment (MICE) will demonstrate the principle of muon beam phase-space reduction via ionization cooling. cooling be required for proposed Neutrino Factory or Collider. before and after cell must measured precisely. This is achieved using two scintillating-fibre trackers, each placed in a solenoidal magnetic field. paper describes software reconstruction fibre trackers: GEANT4 based simulation; implementation geometry; digitisation; space-point reconstruction;...
The Pierre Auger Observatory, located near Malargüe, Argentina, is the world's largest cosmic-ray detector. It comprises a $3000\,\mathrm{km}^{2}$ surface detector and 27 fluorescence telescopes, which measure lateral longitudinal distributions of many millions air-shower particles produced in interactions initiated by cosmic ray Earth's atmosphere. determination nature rays studies performances rely on extensive Monte Carlo simulations describing physics processes occurring air showers...
Cosmic Probes of Fundamental Physics take two primary forms: Very high energy particles (cosmic rays, neutrinos, and gamma rays) gravitational waves. Already today, these probes give access to fundamental physics not available by any other means, helping elucidate the underlying theory that completes Standard Model. The last decade has witnessed a revolution exciting discoveries such as detection high-energy neutrinos scope for major developments in next decades is dramatic, we detail this report.
We present measurements of microwave emission from an electron-beam induced air plasma performed at the 3 MeV electron Van de Graaff facility Argonne National Laboratory. Results include spectrum between 1 and 15 GHz, polarization radiation scaling emitted power with respect to beam intensity. MAYBE provide further insight on extensive showers as a novel detection technique for Ultra-High Energy Cosmic Rays.
Complementing the overview contribution about whitepaper on ultra-high-energy cosmic rays (UHECR) prepared for Snowmass community survey in U.S. [Astroparticle Physics 149 (2023) 102819 - arXiv:2205.05845], this focuses Chapter 6, ‘Instrumentation Roadmap’ UHECR physics next decades. In addition to an increase statistics, a higher measurement accuracy of cosmic-ray air showers is needed answer open questions regarding astrophysics and particle related UHECR. The boost exposure can be...
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...
We present the results of a four-month, spectroscopic campaign Wolf-Rayet dust-making binary, WR137. detect only small-amplitude, random variability in CIII5696 emission line and its integrated quantities (radial velocity, equivalent width, skewness, kurtosis) that can be explained by stochastic clumps wind WC star. find no evidence large-scale, periodic variations often associated with Corotating Interaction Regions could have observed intrinsic continuum polarization this Our moderately...
Context. The two Oe stars HD 45 314 and 60 848 have recently been found to exhibit very different X-ray properties: whilst has an spectrum the emission level typical of most OB stars, features a much harder brighter emission, making it so-called γ Cas analogue.
We present a new method to infer the mass composition of ultra-high energy cosmic rays performing simultaneous modifications simulated depth shower maximu ($X_{\rm max}$) and ground signal. introduce likelihood fit two-dimensional distributions "hybrid observables", $X_{\rm max}$ signal induced by muons electromagnetic particles at different zenith angles. With this method, fractions primary are simultaneously estimated together with shift multiplicative rescaling parameters muon signals in...
Este artigo discute os impactos do rompimento da Barragem de Fundão (RBF), ocorrido em 2015, na oferta escolar destinada às populações campesinas município Rio Doce, Minas Gerais. O RBF contaminou o solo e as águas um percurso 600 km, comprometeu a produção reprodução vida região atingida afetou diretamente povos campesinos. A pesquisa busca responder: como desafia escola relação à formação dos estudantes residentes no campo? Para isso, foram realizadas consultas bancos dados oficiais sobre...