74 citations · 554 across the 21 of their papers we have counts for
11 papers · 1 filter
The evolution of the bi-modal colour distribution of galaxies in SDSS groups
Hector J. Martinez, Ana L. O'Mill, Diego G. Lambas
We analyse colour distributions for several samples of galaxies in groups drawn from the Fourth Data Release of the Sloan Digital Sky Survey. For all luminosity ranges and en…
Groups of galaxies: relationship between environment and galaxy properties
Hector J. Martinez, Hernan Muriel
We analyse how the properties of galaxies in groups identified in the Sloan Digital Sky Survey depend on the environment. In particular, we study the relationship between galaxy pr…
On the luminosity function of galaxies in groups in the Sloan Digital Sky Survey
Ariel Zandivarez, Hector J. Martinez, Manuel E. Merchan
Using galaxy groups identified in the Fourth Data Release of the Sloan Digital Sky Survey (SDSS), we compute the luminosity function for several subsamples of galaxies in groups. I…
The galaxy density environment of gamma-ray burst host galaxies
Carlos G. Bornancini, Hector J. Martinez, Diego G. Lambas +3
We analyze cross-correlation functions between Gamma-Ray Burst (GRB) hosts and surrounding galaxies. We have used data obtained with the Very Large Telescope at Cerro Paranal (Chil…
Clustering and light profiles of galaxies in the environment of 20 Ultra Steep Spectrum Radio sources
Carlos G. Bornancini, Hector J. Martinez, Diego G. Lambas +4
We have analyzed galaxy properties in the neighborhood of 20 Ultra-Steep Spectrum Radio sources (USS) taken from the WISH catalog of De Breuck et al. (2002). Galaxies in these USS…
Galaxy groups in the 2dF galaxy redshift survey: A Compactness Analysis of Groups
A. Zandivarez, M. J. L. Dominguez, C. J. Ragone +2
A comprehensive study on compactness has been carried out on the 2dF Galaxy Group Catalogue constructed by Merchán & Zandivarez. The compactness indexes defined in this work take i…