Revisiting the fossil group candidates UGC 842 and NGC 6034 (2009)
De Oliveira, Raimundo Lopes, Carrasco, Eleazar Rodrigo, De Oliveira, Claudia Mendes, Bortoletto, Daiana Ribeiro, Cypriano, Eduardo, Sodré Jr., Laerte, ...
We present a new insight on NGC 6034 and UGC 842, two groups of galaxies previously reported in the literature as being fossil groups. The study is based on optical photometry and spectroscopy...
A Large X-ray Sample of Fossil Groups (2009)
Miller, Eric D., Rykoff, Eli, Dupke, Renato De Alencar, De Oliveira, Claudia Mendes, McKay, Timothy, Koester, Benjamin
We present Chandra snapshot observations of the first large X-ray sample of optically identified fossil groups. For 9 of 14 candidate groups, we are able to determine the X-ray luminosity and...
De Oliveira, Raimundo Lopes, De Oliveira, Claudia Mendes, Dupke, Renato, Sodré, Laerte, Cypriano, Eduardo
We have started a study of luminosity functions of Fossil Group candidates in order to characterize the faint-end of their galaxy distribution. Here we report on results of nine of them from SDSS...
Fossil Groups in the Millennium Simulation. Evolution of the Brightest Galaxies (2008)
Diaz-Gimenez, Eugenia, Muriel, Hernan, De Oliveira, Claudia Mendes
We create a catalogue of simulated fossil groups and study their properties, in particular the merging histories of their first-ranked galaxies. We compare the simulated fossil group properties with...
Fossil Groups in the Sloan Digital Sky Survey (2007)
Santos, Walter A., De Oliveira, Claudia Mendes, Sodré Jr, Laerte
A search for fossil groups in the Sloan Digital Sky Survey was performed using virtual observatory tools. A cross-match of the positions of all SDSS Luminous Red Galaxies (with r < 19 and measured...
A flat faint end of the Fornax cluster galaxy luminosity function (2007)
Mieske, Steffen, Hilker, Michael, Infante, Leopoldo, De Oliveira, Claudia Mendes
We analyse the photometric properties of the early-type Fornax cluster dwarf galaxy population (M_V>-17 mag), based on a wide field imaging study of the central cluster area in V and I band-passes...
From Nearby to High Redshift Compact Group of Galaxies (2007)
Amram, Philippe, Balkowski, Chantal, De Oliveira, Claudia Mendes, Plana, Henri, Epinat, Benoit
Nearby Compact Groups of Galaxies (CGs) are very complex systems, tracing their history is a challenge (e.g. Stephan's Quintet). The presence of a diffuse X-rays emission that often peaks in the...
From Nearby to High Redshift Compact Group of Galaxies (2006)
Amram, Philippe, Balkowski, Chantal, De Oliveira, Claudia Mendes, Plana, Henri, Epinat, Benoit
Nearby Compact Groups of Galaxies (CGs) are very complex systems, tracing their history is a challenge (e.g. Stephan's Quintet). The presence of a diffuse X-rays emission that often peaks in the...
Intra-group diffuse light in compact groups of galaxies. HCG 79, HCG 88 and HCG 95 (2005)
Da Rocha, Cristiano, De Oliveira, Claudia Mendes
Deep $B$ and $R$ images of three Hickson Compact Groups, HCG 79, HCG 88 and HCG 95, were analyzed using a new wavelet technic to measure possible intra-group diffuse light present in these systems....
Intra-group Light in Hickson Compact Groups (2005)
Da Rocha, Cristiano, De Oliveira, Claudia Mendes, Ziegler, Bodo L.
We have analyzed the intra-group light component of 3 Hickson Compact Groups (HCG 79, HCG 88 and HCG 95) with detections in two of them: HCG 79, with $46\pm11%$ of the total $B$ band luminosity and...
Intra-Group Light in Hickson Compact Groups - A Wavelet Approach (2005)
Da Rocha, Cristiano, De Oliveira, Claudia Mendes, Ziegler, Bodo L.
A diffuse component of intra-group light can be observed in compact groups of galaxies. This component is presumably due to stellar material tidally stripped from the member galaxies of the group,...
The epochs of early-type galaxy formation as a function of environment (2005)
Thomas, Daniel, Maraston, Claudia, Bender, Ralf, De Oliveira, Claudia Mendes
Flint, Kathleen, Metevier, Anne J., Bolte, Michael, De Oliveira, Claudia Mendes
We present a program to study the galaxy luminosity function (GLF) of the Leo I and Coma I Groups at ~10 Mpc. We have surveyed over seven square degrees in Leo I and ~11 square degrees in Coma I. In...
De Oliveira, Claudia Mendes, Plana, Henri, Amram, Philippe, Bolte, Mike, Boulesteix, Jacques
We report on kinematic observations of Ha emission line from four late-type galaxies of Hickson Compact Group 16 (H16a,b,c and d) obtained with a scanning Fabry-Perot interferometer and samplings of...