119 citations · 319 across the 11 of their papers we have counts for
11 papers
Gaia GraL: Gaia DR2 Gravitational Lens Systems. V. Doubly-imaged QSOs discovered from entropy and wavelets
A. Krone-Martins, M. J. Graham, D. Stern +22
The discovery of multiply-imaged gravitationally lensed QSOs is fundamental to many astronomical and cosmological studies. However, these objects are rare and challenging to discov…
NGC 6845: metallicity gradients and star formation in a complex compact group
D. Olave-Rojas, S. Torres-Flores, E. R. Carrasco +3
We have obtained Gemini/GMOS spectra of 28 regions located across the interacting group NGC 6845, spanning from the inner regions of the four major galaxies (NGC 6845A, B, C, D) to…
Star-forming regions and the metallicity gradients in the tidal tails: The case of NGC 92
Sergio Torres-Flores, Sergio Scarano, Claudia Mendes de Oliveira +3
We present new Gemini/GMOS spectroscopic and archival imaging data of the interacting galaxy NGC 92, which is part of a compact group and displays an extended tidal tail. We have s…
Bimodal chemical evolution of the Galactic disk and the Barium abundance of Cepheids
Jacques R. D. Lepine, Sergei Andrievky, Douglas A. Barros +2
In order to understand the Barium abundance distribution in the Galactic disk based on Cepheids, one must first be aware of important effects of the corotation resonance, situated…
The Brazilian Tunable Filter Imager for the SOAR telescope
Cláudia Mendes de Oliveira, Keith Taylor, Bruno Quint +22
This paper presents a new Tunable Filter Instrument for the SOAR telescope. The Brazilian Tunable Filter Imager (BTFI) is a versatile, new technology, tunable optical imager to be…
Radial Metallicity Distribution Breaks at Corotation Radius in Spiral Galaxies
Sergio Scarano, Jacques R. D. Lépine
We analyzed the relation between the corotation radii and the galactic radii at which breaks or changes of slope of the metallicity gradients occur in spiral galaxies. With this pu…