92 citations · 2k across the 107 of their papers we have counts for
13 papers · 1 filter
Witnessing gas mixing in the metal distribution of the Hickson Compact Group HCG 31
S. Torres-Flores, C. Mendes de Oliveira, P. Amram +3
We present, for the first time, direct evidence that, in a merger of disk galaxies, the preexisting central metallicities will mix as a result of gas being transported in the merge…
A 3D view of the Hydra I cluster core - II. Stellar populations
Carlos Eduardo Barbosa, Magda Arnaboldi, Michael Hilker +3
Several observations of the central region of the Hydra I galaxy cluster point to a multi-epoch assembly history. Using our novel FORS2/VLT spectroscopic data set, we were able to…
A 3D view of the Hydra I galaxy cluster core - I. Kinematic substructures
Michael Hilker, Carlos Eduardo Barbosa, Tom Richtler +3
We used FORS2 in MXU mode to mimic a coarse 'IFU' in order to measure the 3D large-scale kinematics around the central Hydra I cluster galaxy NGC 3311. Our data show that the veloc…
Star Formation Histories Across the Interacting Galaxy NGC 6872, the Largest-Known Spiral
Rafael T. Eufrasio, Eli Dwek, Richard G. Arendt +5
NGC 6872, hereafter the Condor, is a large spiral galaxy that is interacting with its closest companion, the S0 galaxy IC 4970. The extent of the Condor provides an opportunity for…
Studying focal ratio degradation of optical fibers for Subaru Prime Focus Spectrograph
Jesulino Bispo dos Santos, Antonio Cesar de Oliveira, James Gunn +9
Focal Ration Degradation (FRD) is a change in light angular distribution caused by fiber optics. FRD is important to fiber-fed, spectroscopic astronomical systems because it can ca…
Multi-fibers connectors systems for FOCCoS-PFS-Subaru
Antonio Cesar de Oliveira, Ligia Souza de Oliveira, Lucas Souza Marrara +8
The Fiber Optical Cable and Connector System (FOCCoS), provides optical connection between 2400 positioners and a set of spectrographs through optical fibers cables as part of PFS…
Fiber Optical Cable and Connector System (FOCCoS) for PFS/Subaru
Antonio Cesar de Oliveira, Lígia Souza de Oliveira, Márcio V. de Arruda +29
FOCCoS, Fiber Optical Cable and Connector System, has the main function of capturing the direct light from the focal plane of Subaru Telescope using optical fibers, each one with a…
Progress with the Prime Focus Spectrograph for the Subaru Telescope: a massively multiplexed optical and near-infrared fiber spectrograph
Hajime Sugai, Naoyuki Tamura, Hiroshi Karoji +81
The Prime Focus Spectrograph (PFS) is an optical/near-infrared multi-fiber spectrograph with 2394 science fibers, which are distributed in 1.3 degree diameter field of view at Suba…
A census of H emitters in the intergalactic medium of the NGC 2865 system
F. Urrutia-Viscarra, M. Arnaboldi, C. Mendes de Oliveira +4
Tidal debris which are rich in HI gas, formed in interacting and merging systems, are suitable laboratories to study star formation outside galaxies. Recently, several such systems…
The H kinematics of interacting galaxies in 12 compact groups
S. Torres-Flores, P. Amram, C. Mendes de Oliveira +4
We present new Fabry-Perot observations for a sample of 42 galaxies located in twelve compact groups of galaxies: HCG 1, HCG 14, HCG 25, HCG 44, HCG 53, HCG 57, HCG 61, HCG 69, HCG…
Goals and strategies in the global control design of the OAJ Robotic Observatory
A. Yanes-Díaz, S. Rueda-Teruel, J. L. Antón +21
There are many ways to solve the challenging problem of making a high performance robotic observatory from scratch. The Observatorio Astrofísico de Javalambre (OAJ) is a new astron…
The red sequence of Abell X-ray underluminous clusters
J. J. Trejo-Alonso, C. A. Caretta, T. F. Laganá +4
We present an analysis of the colour-magnitude relation for a sample of 56 X-ray underluminous Abell clusters, aiming to unveil properties that may elucidate the evolutionary stage…
Spatially resolved stellar population parameters in the BCGs of two fossil groups
Robert N. Proctor, Claudia Mendes de Oliveira, Paul Eigenthaler
We report the results of Gemini/GMOS long-slit spectroscopic observations along the major and minor axes of the central galaxies in two fossil groups, SDSS J073422.21+265133.9 and…