161 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Universidade de São PauloBR20 papers
- Universidade Federal de Santa CatarinaBR12 papers
- Universidade Federal do Rio Grande do SulBR12 papers
- Universidade Federal de Santa MariaBR9 papers
- Instituto Mauá de TecnologiaBR4 papers
- Laboratório Nacional de AstrofísicaBR4 papers
- Universidade Federal de Mato GrossoBR4 papers
- Instituto de Geofísica y AstronomíaCU3 papers
- Museu de Astronomia e Ciências AfinsBR3 papers
- Shanghai Astronomical ObservatoryCN3 papers
- Universidade Estadual Paulista (Unesp)BR3 papers
- Universidade Federal de ItajubáBR3 papers
45 papers
Evaluating the efficacy of a data cube treatment procedure for kinematic analyses: application to NGC 3115 and NGC 4699
R. B. Menezes, L. D. B. Sonoda, Patrícia da Silva +5
Data cubes have been increasingly used in astronomy. These data sets, however, are usually affected by instrumental effects and high-frequency noise. In this work, we evaluate the…
Digging deeper into NGC 6868 II: ionized gas and excitation mechanism
João P. V. Benedetti, Rogério Riffel, Tiago Ricci +9
We studied the ionized gas in the inner region ( pc) of the galaxy NGC 6868 using Gemini/GMOS integral field unit observations. Channel maps reveal complex ki…
The Origin of Massive Compact Galaxies: Lessons from IllustrisTNG
F. S. Lohmann, A. Schnorr-Müller, M. Trevisan +2
We investigate the formation and evolution of z=0 massive compact galaxies (MCGs) in the IllustrisTNG cosmological simulation. We found that, as in observations, MCGs are mainly ol…
The DIVING Survey - Deep IFS View of Nuclei of Galaxies - III. Analysis of the nuclear region of the early-type galaxies of the sample
T. V. Ricci, J. E. Steiner, R. B. Menezes +2
We analysed the nuclear region of all 56 early-type galaxies from the DIVING Project, which is a statistically complete sample of objects that contains all 170 galaxi…
Digging deeper into NGC\,6868 I: stellar population
João P. V. Benedetti, Rogério Riffel, Tiago Ricci +8
We use Gemini integral field unit observations to map the stellar population properties in the inner region ( pc) of the galaxy NGC 6868. In order to understa…
IFU observations of the inner 200 pc of NGC 4546: gas rotation, non-circular motions and ionised outflows
Kelly F. Heckler, Tiago V. Ricci, Rogemar A. Riffel
We present a detailed analysis of the ionised gas distribution and kinematics in the inner ~ 200 pc of NGC 4546, host of a Low Luminosity Active Galactic Nucleus (LLAGN). Using GMO…
Active Galactic Nuclei signatures in Red Geyser galaxies from Gemini GMOS-IFU observations
G. S. Ilha, R. A. Riffel, T. V. Ricci +8
Red Geysers are quiescent galaxies with galactic scale ionised outflows, likely due to low-luminosity Active Galactic Nuclei (AGN). We used Gemini GMOS-IFU observations of the inne…
The DIVING Survey -- Deep IFS View of Nuclei of Galaxies -- II. First results: nuclear emission-line properties of the mini-DIVING sample
R. B. Menezes, J. E. Steiner, T. V. Ricci +1
This work presents the first results of the Deep IFS View of Nuclei of Galaxies (DIVING) survey. We analysed the nuclear emission-line spectra of a sub-sample we call…
ClinicalPath: a Visualization tool to Improve the Evaluation of Electronic Health Records in Clinical Decision-Making
Claudio D. G. Linhares, Daniel M. Lima, Jean R. Ponciano +5
Physicians work at a very tight schedule and need decision-making support tools to help on improving and doing their work in a timely and dependable manner. Examining piles of shee…
The starting dates of COVID-19 multiple waves
Paulo Roberto de Lima Gianfelice, Ricardo Sovek Oyarzabal, Americo Cunha +3
The severe acute respiratory syndrome of coronavirus 2 spread globally very quickly, causing great concern at the international level due to the severity of the associated respirat…
The DIVING Survey -- Deep IFS View of Nuclei of Galaxies -- I. Definition and Sample Presentation
J. E. Steiner, R. B. Menezes, T. V. Ricci +7
We present the Deep Integral Field Spectrograph View of Nuclei of Galaxies (DIVING) survey, a seeing-limited optical 3D spectroscopy study of the central regions of all 170…
Chirality Induced Propagation Velocity Asymmetry
Diego A. Hoff, Luis G. C. Rego
The spin-dependent propagation of electrons in helical nanowires is investigated. We show that the interplay of spin angular momentum and nanowire chirality, under spin-orbit inter…
A Gemini-NIFS view of the merger remnant NGC 34
J. C. Motter, R. Riffel, T. V. Ricci +8
The merger remnant NGC 34 is a local luminous infrared galaxy (LIRG) hosting a nuclear starburst and a hard X-ray source associated with a putative, obscured Seyfert~2 nucleus. In…
Quantification of parametric uncertainties induced by irregular soil loading in orchard tower sprayer nonlinear dynamics
Americo Cunha, Jorge Luis Palacios Felix, José Manoel Balthazar
This paper deals with the nonlinear stochastic dynamics of an orchard tower sprayer subjected to random excitations due to soil irregularities. A consistent stochastic model of unc…
The Puzzling Origin of Massive Compact Galaxies in MaNGA
A. Schnorr-Müller, M. Trevisan, R. Riffel +7
We characterized the kinematics, morphology, and stellar population (SP) properties of a sample of massive compact quiescent galaxies (MCGs, /$M_\odot \le…
Anomalous decay rate of quasinormal modes in Reissner-Nordström black holes
R. D. B. Fontana, P. A. González, Eleftherios Papantonopoulos +1
The anomalous decay rate of the quasinormal modes occurs when the longest-lived modes are the ones with higher angular number. Such behaviour has been recently studied in different…
Stability of the Cauchy horizon in accelerating black-hole spacetimes
Kyriakos Destounis, Rodrigo D. B. Fontana, Filipe C. Mena
The extendibility of spacetime and the existence of weak solutions to the Einstein field equations beyond Cauchy horizons, is a crucial ingredient to examine the limits of General…
Measuring the mass of the supermassive black hole of the lenticular galaxy NGC 4546
T. V. Ricci, J. E. Steiner
Most galaxies with a well-structured bulge host a supermassive black hole (SMBH) in their centre. Stellar kinematics models applied to adaptive optics (AO) assisted integral field…
Analytical correspondence between shadow radius and black hole quasinormal frequencies
B. Cuadros-Melgar, R. D. B. Fontana, Jeferson de Oliveira
We consider the equivalence of quasinormal modes and geodesic quantities recently brought back due to the black hole shadow observation by Event Horizon Telescope. Using WKB method…
Late-time tails, entropy aspects, and stability of black holes with anisotropic fluids
B. Cuadros-Melgar, R. D. B. Fontana, Jeferson de Oliveira
In this work we consider black holes surrounded by anisotropic fluids in four dimensions. We first study the causal structure of these solutions showing some similarities and diffe…
802.11g Signal Strength Evaluation in an Industrial Environment
Dalton Cézane Gomes Valadares, Joseana Macêdo Fechine Régis de Araújo, Marco Aurélio Spohn +3
The advances in wireless network technologies and Industrial Internet of Things (IIoT) devices are easing the establishment of what is called Industry 4.0. For the industrial envir…
A panchromatic spatially resolved study of the inner 500pc of NGC1052 -- II: Gas excitation and kinematics
Luis G. Dahmer-Hahn, Rogério Riffel, Tiago V. Ricci +8
We map the optical and near-infrared (NIR) emission-line flux distributions and kinematics of the inner 320535pc of the elliptical galaxy NGC1052. The integral field sp…
Strong Cosmic Censorship in Horndeski Theory
Kyriakos Destounis, Rodrigo D. B. Fontana, Filipe C. Mena +1
The strong cosmic censorship hypothesis has recently regained a lot of attention in charged and rotating black holes immersed in de Sitter space. Although the picture seems to be c…
The Super-Planckian Axion Strikes Back
Nayara Fonseca, Benedict von Harling, Leonardo de Lima +1
We present a novel framework for obtaining large hierarchies in axion decay constants as well as trans-Planckian field excursions, with no need for tuning or a large number of fiel…