924 citations · 4.5k across the 99 of their papers we have counts for
18 papers · 1 filter
On the accuracy of the high redshift cluster luminosity function
Roberto P. Muñoz, Nelson D. Padilla, Luis F. Barrientos
We study the reliability of the statistical background subtraction method for computing the Ks-band luminosity function of cluster galaxies at z~1 using mock Red-sequence Cluster S…
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…
Large-scale modulation of star formation in void walls
Laura Ceccarelli, Nelson Padilla, Diego Garcia Lambas
We perform a statistical study of the characteristics of galaxies in voids and void walls in the SDSS and 2dFGRS catalogues. We investigate dependencies of the distribution of gala…
The shapes of galaxies in the Sloan Digital Sky Survey
Nelson D. Padilla, Michael A. Strauss
We determine the underlying shapes of spiral and elliptical galaxies in the Sloan Digital Sky Survey Data Release 6 from the observed distribution of projected galaxy shapes, takin…
Spatial clustering of USS sources and galaxies
Carlos G. Bornancini, Nelson Padilla, Diego G. Lambas +1
We present measurements of the clustering properties of galaxies in the field of redshift range Ultra Steep Spectrum (USS) radio sources selected from…
Cluster infall in the concordance LCDM model
Maximiliano C. Pivato, Nelson D. Padilla, Diego G. Lambas
We perform statistical analyses of the infall of dark-matter onto clusters in numerical simulations within the concordance LCDM model. By studying the infall profile around cluster…
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 galaxy luminosity function around groups
R. E. Gonzalez, N. D. Padilla, G. Galaz +1
We present a study on the variations of the luminosity function of galaxies around clusters in a numerical simulation with semi-analytic galaxies, attempting to detect these variat…
Cosmological parameters from CMB measurements and the final 2dFGRS power spectrum
Ariel G. Sanchez, C. M. Baugh, W. J. Percival +5
We derive constraints on cosmological parameters using the power spectrum of galaxy clustering measured from the final two-degree field galaxy redshift survey (2dFGRS) and a compil…
The 2dF Galaxy Redshift Survey: The clustering of galaxy groups
Nelson D. Padilla, C. M. Baugh, V. R. Eke +27
We measure the clustering of galaxy groups in the 2dFGRS Percolation-Inferred Galaxy Group (2PIGG) catalogue. The 2PIGG sample has 29,000 groups with at least two members. The clus…
Galaxy groups in the 2dF galaxy redshift survey: Large Scale Structure with Groups
Ariel Zandivarez, Manuel E. Merchan, Nelson D. Padilla
We use the 2dF Galaxy Group Catalogue constructed by Merchán & Zandivarez to study the large scale structure of the Universe traced by galaxy groups. We concentrate on the computat…
Anisotropies in the redshift-space correlations of galaxy groups and clusters II: Analysis of observational cluster samples
N. D. Padilla, D. G. Lambas
We study the redshift space correlation function of galaxy clusters for observational samples constructed in different surveys. We explore correlation amplitudes, pairwise velocity…
Anisotropies in the redshift-space correlations of galaxy groups and clusters I: Simulated catalogues
N. D. Padilla, D. G. Lambas
We analyse the correlation function of mock galaxy clusters in redshift space. We constructed several mock catalogues designed to mimic the selection biases inherent in a variety o…
The power spectrum of galaxy clustering in the APM survey
N. D. Padilla, C. M. Baugh
We measure the power spectrum of galaxy clustering in real space from the APM Galaxy Survey. We present an improved technique for the numerical inversion of Limber's equation that…
Cluster correlations in redshift space
Nelson D. Padilla, Carlton M. Baugh
We test an analytic model for the two-point correlations of galaxy clusters in redshift space using the Hubble Volume N-body simulations. The correlation function of clusters shows…
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…
Peculiar Velocities and the Mean Density Parameter
Nelson Padilla, Diego G. Lambas
We study the peculiar velocity field inferred from the Mark III spirals using a new method of analysis. We estimate optimal values of Tully-Fisher scatter and zero-point offset, an…
Effects of Distance Uncertainties on Determinations of the Galaxy Peculiar Velocity Field
Nelson Padilla, Manuel Merchán, Diego G. Lambas
Our statistical studies comprise the mean relative velocity and velocity correlation for pairs of galaxies as a function of separation, and a bulk flow analysis determined on spher…