830 citations · 1.5k across the 35 of their papers we have counts for
12 papers · 1 filter
Voids in the 2dFGRS and LCDM simulations: spatial and dynamical properties
Laura Ceccarelli, Nelson Padilla, Carlos Valotto +1
We perform a statistical study on the distribution and dynamics of voids in the 2dFGRS. Our statistics are tested and calibrated using mock 2dFGRS catalogues. We analyse the dynami…
Galaxy Peculiar Velocities and Infall onto Groups
M. L. Ceccarelli, C. Valotto, D. G. Lambas +3
We perform statistical analyses to study the infall of galaxies onto groups and clusters in the nearby Universe. The study is based on the UZC and SSRS2 group catalogs and peculiar…
The faint-end of the galaxy luminosity function in groups
R. E. Gonzalez, M. Lares, D. G. Lambas +1
We compute the galaxy luminosity function in spectroscopically selected nearby groups and clusters. Our sample comprises 728 systems extracted from the third release of the Sloan D…
The Arecibo Legacy Fast ALFA Survey: I. Science Goals, Survey Design and Strategy
Riccardo Giovanelli, Martha P. Haynes, Brian R. Kent
The recently initiated Arecibo Legacy Fast ALFA (ALFALFA) survey aims to map 7000 square degrees of the high galactic latitude sky visible from Arecibo, providing a HI line spectra…
Extinction Effects in Spiral Galaxy Rotation Curves
Carlos Valotto, Riccardo Giovanelli
Observations show that the slope of the inner part of the H/[NII] rotation curves of disk galaxies is depressed by extinction: at fixed luminosity, the observed slope is in fact…
Faint galaxy population in clusters: X-ray emission, cD halos and projection effects
Carlos A. Valotto, Hernan Muriel, Ben Moore +1
We analyze samples of nearby clusters taken from the Abell catalog and the X-ray Sample of Bright Clusters(De Grandi et al 1999) including a wide range of X-ray luminosities.Using…
Redshift-Space Distortions of Group and Galaxy Correlations
Nelson D. Padilla, Manuel E. Merchán, Carlos A. Valotto +2
The two-point correlation function is computed for galaxies and groups of galaxies selected using 3-dimensional information from the Updated Zwicky Galaxy Catalog - (UZC). The reds…
Do clusters contain a large population of dwarf galaxies?
Carlos A. Valotto, Ben Moore, Diego G. Lambas
We analyze systematic effects in the determination of the galaxy luminosity function in clusters using a deep mock catalogue constructed from a numerical simulation of a hierarchic…
Velocity dispersion estimates of APM galaxy clusters
M. Victoria Alonso, Carlos Valotto, Diego G. Lambas +1
We present 83 new galaxy radial velocities in the field of 18 APM clusters with redshifts between 0.06 and 0.13. The clusters have Abell identifications and the galaxies were selec…
Quasar-galaxy and AGN-galaxy cross-correlations
H. J. Martinez, M. E. Merchan, C. A. Valotto +1
We compute quasar-galaxy and AGN-galaxy cross-correlation functions for samples taken from the \cite{VCV98} catalog of quasars and active galaxies, using tracer galaxies taken from…
Galaxy Luminosity Function in Groups
Hernán Muriel, Carlos A. Valotto, Diego G. Lambas
We compute the luminosity function of galaxies in groups. The data consists in two samples of groups of galaxies selected in distance and redshift space comprising a total number o…
Cluster-Galaxy Correlations in CDM Models
M. E. Merchan, M. G. Abadi, D. G. Lambas +1
We study the ability of COBE-normalized CDM models to reproduce observed properties of the distribution of galaxies and clusters using N-body numerical simulations. We analyze the…