166 citations
- Universidade Federal do Rio de JaneiroBR7 papers
- National ObservatoryBR6 papers
- Valongo ObservatoryBR6 papers
- Observatoire de ParisFR4 papers
- Institut de Mécanique Céleste et de Calcul des ÉphéméridesFR3 papers
- National Institute for AstrophysicsIT3 papers
- Osservatorio Astrofisico di TorinoIT3 papers
- Universidade do Estado do Rio de JaneiroBR3 papers
- Laboratoire Temps EspaceFR2 papers
- Laboratório Interinstitucional de e-AstronomiaBR2 papers
- Systèmes de Référence Temps-EspaceFR2 papers
- Universidade Tecnológica Federal do ParanáBR2 papers
10 papers
The vertex in QCD Sum Rules: form factors and coupling constant
A. Cerqueira, B. Osório Rodrigues, M. E. Bracco +1
In this work we study the meson vertex using the QCD sum rules. We compute the three point correlation functions for the three cases of different off-shell mesons. The fo…
Adversarial Machine Learning in Image Classification: A Survey Towards the Defender's Perspective
Gabriel Resende Machado, Eugênio Silva, Ronaldo Ribeiro Goldschmidt
Deep Learning algorithms have achieved the state-of-the-art performance for Image Classification and have been used even in security-critical applications, such as biometric recogn…
Astrometry of the main satellites of Uranus: 18 years of observations
J. I. B. Camargo, F. P. Magalhães, R. Vieira-Martins +7
We determine accurate positions of the main satellites of Uranus: Miranda, Ariel, Umbriel, Titania, and Oberon. Positions of Uranus, as derived from those of these satellites, are…
Astrometric positions for 18 irregular satellites of giant planets from 23 years of observations
A. R. Gomes-Júnior, M. Assafin, R. Vieira-Martins +12
The irregular satellites of the giant planets are believed to have been captured during the evolution of the solar system. Knowing their physical parameters, such as size, density,…
Candidate stellar occultations by large trans-neptunian objects up to 2015
M. Assafin, J. I. B. Camargo, R. Vieira Martins +4
We study large trans-neptunian objects (TNOs) using stellar occultations. We derive precise astrometric predictions for stellar occultations by Eris, Haumea, Ixion, Makemake, Orcus…
On the influence of radio extended structures on offsets between the optical and VLBI positions of sources in the ICRF2
J. I. B. Camargo, A. H. Andrei, M. Assafin +2
Context: To investigate the differences between positions, as determined by optical (direct imaging) and Very Long Baseline Interferometry (VLBI) techniques, of extragalactic sourc…