205 citations
- Universidade de São PauloBR43 papers
- Universidad Nacional de La PlataAR32 papers
- Consejo Nacional de Investigaciones Científicas y TécnicasAR31 papers
- Instituto Nacional de Pesquisas EspaciaisBR31 papers
- Universidade Federal do Rio Grande do SulBR28 papers
- Instituto de Astrofísica de La Plata26 papers
- Laboratório Nacional de AstrofísicaBR21 papers
- Universidade Federal de Santa MariaBR20 papers
- Instituto de Astrofísica de AndalucíaES18 papers
- Valongo ObservatoryBR14 papers
- Centre National de la Recherche ScientifiqueFR13 papers
- Universidade Federal de Santa CatarinaBR12 papers
9 papers · 1 filter
Association of radio polar cap brightening with bright patches and coronal holes
Caius L. Selhorst, Paulo J. A. Simoes, Alexandre J. Oliveira e Silva +3
Radio-bright regions near the solar poles are frequently observed in Nobeyama Radioheliograph (NoRH) maps at 17 GHz, and often in association with coronal holes. However, the origi…
New quantitative nitrogen abundance estimations in a sample of Seyfert 2 Active Galactic Nuclei
O. L. Dors, K. Z. Arellano-Cordova, M. V. Cardaci +1
We obtained new quantitative determinations of the nitrogen abundance and a consistent relation between nitrogen and oxygen abundances for a sample of Seyfert 2 galaxies located at…
The behavior of the spotless active regions during the solar minimum 23-24
Alexandre J. Oliveira e Silva, Caius L. Selhorst
In this work, we analysed the physical parameters of the spotless actives regions observed during solar minimum 23 - 24 (2007 - 2010). The study was based on radio maps at 17~GHz o…
Analysis Of Kepler-71 Activity Through Planetary Transit
Eber A. Gusmão, Caius L. Selhorst, Alexandre S. Oliveira
An exoplanet transiting in front of the disk of its parent star may hide a dark starspot causing a detectable change in the light curve, that allows to infer physical characteristi…
The influence of eclipses in the stellar radio emission
Caius L. Selhorst, Adriana Valio
Here we simulate the shape of a planetary transit observed at radio wavelengths. The simulations use a light curve of the K4 star HAT-P-11 and its hot Jupiter companion as proxy. F…
2D kinematic study of the central region of NGC 4501
P. Repetto, M. Faundez-Abans, P. Freitas-Lemes +2
GMOS-IFU observational data were used to study the detailed two dimensional gas kinematics and morphological structures within the ~500x421 pc^2 of the active Seyfert 2 galaxy NGC…