3 papers · 1 filter
Evidence for overdensity around z_em > 4 quasars from the proximity effect
Rodney Nascimento Guimaraes, Patrick Petitjean, Emmanuel Beaumont Rollinde +5
We study the density field around z_em > 4 quasars using high quality medium spectral resolution ESI-Keck spectra (R~4300, SNR > 25) of 45 high-redshift quasars selected from a tot…
The Faint End of the Luminosity Function of Galaxies in Compact Groups
Stephen E. Zepf, Reinaldo R. de Carvalho, Andre L. B. Ribeiro
We study the luminosity function of galaxies in Hickson groups using our recent redshift survey of galaxies in and around 17 of these groups. We find that the galaxies in these reg…
Southern Binary Galaxies. I. a Sample of Isolated Pairs
D. S. L. Soares, R. E. de Souza, R. R. de Carvalho +1
A catalogue of binary galaxies with 621 pairs has been determined by applying a surface density enhancement procedure to {\it The Surface Photometry Catalogue of the ESO-Uppsala Ga…