189 citations · 528 across the 15 of their papers we have counts for
16 papers
On the weak lensing masses of a new sample of galaxy groups
Elizabeth J. Gonzalez, Facundo Rodriguez, Manuel Merchán +6
Galaxy group masses are important to relate these systems with the dark matter halo hosts. However, deriving accurate mass estimates is particularly challenging for low-mass galaxy…
Deviations from tidal torque theory: evolution of the halo spin-filament alignment
Pablo López, Marius Cautun, Dante Paz +2
The alignment between halo spins and the cosmic web is still poorly understood despite being a widely studied topic. Here, we study this alignment within the context of tidal torqu…
The galaxy size - halo mass scaling relations and clustering properties of central and satellite galaxies
Facundo Rodriguez, Antonio D. Montero-Dorta, Raul E. Angulo +2
In this work, we combine size and stellar mass measurements from the Sloan Digital Sky Server (SDSS) with the group finder algorithm of Rodriguez \& Merchán in order to determine t…
Combining FOF and halo-based algorithms for the identification of galaxy groups
Facundo Rodriguez, Manuel Merchán
Galaxy groups provide the means for a great diversity of studies that contribute to a better understanding of the structure of the universe on a large scale and allow the propertie…
GriSPy: A Python package for Fixed-Radius Nearest Neighbors Search
Martin Chalela, Emanuel Sillero, Luis Pereyra +4
We present a new regular grid search algorithm for quick fixed-radius nearest-neighbor lookup developed in Python. This module indexes a set of k-dimensional points in a regular gr…
Detection and analysis of cluster-cluster filaments
Luis A. Pereyra, Mario A. Sgró, Manuel E. Merchán +2
In this work, we identify and analyse the properties of cluster-cluster filaments within a cosmological simulation assuming that they are structures connecting maxima of the densit…
Effects of environment on sSFR profiles of late-type galaxies in the CALIFA survey
V. Coenda, D. Mast, H. J. Martínez +2
We explore the effects of environment on star formation in late-type galaxies by studying the dependence of the radial profiles of specific star formation rate (sSFR) on environmen…
Deviations from tidal torque theory: environment dependences on halo angular momentum growth
Pablo López, Manuel E. Merchán, Dante J. Paz
The tidal torque theory (TTT) relates the origin and evolution of angular momentum with the environment in which dark matter (DM) haloes form. The deviations introduced by late non…
Weak lensing measurement of the mass-richness relation using the SDSS database
Elizabeth Johana Gonzalez, Facundo Rodriguez, Diego García Lambas +3
We study the mass-richness relation using galaxy catalogues and images from the Sloan Digital Sky Survey. We use two independent methods, in the first one, we calibrate the scaling…
The MeSsI (Merging Systems Identification) Algorithm & Catalogue
Martín de los Rios, Mariano J. Domínguez R., Dante Paz +1
Merging galaxy systems provides observational evidence of the existence of dark matter and constraints on its properties. Therefore, statistical uniform samples of merging systems…
Taking advantage of photometric galaxy catalogues to determine the halo occupation distribution
Facundo Rodriguez, Manuel Merchán, Mario Agustín Sgró
Context. Halo occupation distribution (HOD) is a powerful statistic that allows the study of several aspects of the matter distribution in the Universe, such as evaluating semi-ana…
Subhaloes gone Notts: Spin across subhaloes and finders
Julian Onions, Yago Ascasibar, Peter Behroozi +15
We present a study of a comparison of spin distributions of subhaloes found associated with a host halo. The subhaloes are found within two cosmological simulation families of Milk…
SubHaloes going Notts: The SubHalo-Finder Comparison Project
Julian Onions, Alexander Knebe, Frazer R. Pearce +14
We present a detailed comparison of the substructure properties of a single Milky Way sized dark matter halo from the Aquarius suite at five different resolutions, as identified by…
Alignments of Galaxy Group Shapes with Large Scale Structure
Dante J. Paz, Mario A. Sgró, Manuel Merchán +1
In this paper we analyse the alignment of galaxy groups with the surrounding large scale structure traced by spectroscopic galaxies from the Sloan Digital Sky Survey Data Release 7…
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…
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…