191 citations · 1.5k across the 42 of their papers we have counts for
25 papers · 1 filter
Guess the cheese flavour by the size of its holes: A cosmological test using the abundance of Popcorn voids
Dante J. Paz, Carlos M. Correa, Sebastián R. Gualpa +4
We present a new definition of cosmic void and a publicly available code with the algorithm that implements it. Underdense regions are defined as free-form objects, called popcorn…
How do galaxies populate halos in extreme density environments? An analysis of the Halo Occupation Distribution in SDSS
Ignacio G. Alfaro, Facundo Rodriguez, Andrés N. Ruiz +2
Recent works have shown that the properties of galaxy populations in dark matter halos vary with large-scale environments. These results suggest a variation in the halo occupation…
Imprints of the cosmic void evolution on the baryon processes inside galaxy haloes
Agustín M. Rodríguez Medrano, Dante J. Paz, Federico A. Stasyszyn +1
Cosmic voids provide a unique environment to study galaxy formation and evolution. In this paper, we analyse a set of hydrodynamic zoom-in simulations of voids, to analyse in detai…
Evolution mapping: a new approach to describe matter clustering in the non-linear regime
Ariel G. Sanchez, Andrés N. Ruiz, Jenny Gonzalez Jara +1
We present a new approach to describe statistics of the non-linear matter density field that exploits a degeneracy in the impact of different cosmological parameters on the linear…
Redshift-space effects in voids and their impact on cosmological tests. Part II: the void-galaxy cross-correlation function
Carlos M. Correa, Dante J. Paz, Nelson D. Padilla +3
This is the second part of a thorough investigation of the redshift-space effects that affect void properties and the impact they have on cosmological tests. Here, we focus on the…
Galaxy populations in haloes in high-density environments
Ignacio G. Alfaro, Andres N. Ruiz, Heliana E. Luparello +2
There are hints suggesting that properties of galaxy populations in dark matter haloes may depend on their large-scale environment. Recent works point out that very low-density env…
Improved two-point correlation function estimates using glass-like distributions as a reference sample
Federico Dávila-Kurbán, Ariel G. Sanchez, Marcelo Lares +1
All estimators of the two-point correlation function are based on a random catalogue, a set of points with no intrinsic clustering following the selection function of a survey. Hig…
Redshift-space effects in voids and their impact on cosmological tests. Part I: the void size function
Carlos M. Correa, Dante J. Paz, Ariel G. Sánchez +3
Voids are promising cosmological probes. Nevertheless, every cosmological test based on voids must necessarily employ methods to identify them in redshift space. Therefore, redshif…
Spatial correlations of extended cosmological structures
M. V. Santucho, H. E. Luparello, M. Lares +3
Studies of large-scale structures in the Universe, such as superstructures or cosmic voids, have been widely used to characterize the properties of the cosmic web through statistic…
How galaxies populate haloes in very low-density environments? An analysis of the Halo Occupation Distribution in cosmic voids
Ignacio. G. Alfaro, Facundo Rodriguez, Andrés N. Ruiz +1
Evidence shows properties of dark matter haloes may vary with large-scale environment. By studying the halo occupation distribution in cosmic voids it is possible to obtain useful…
Non-fiducial cosmological test from geometrical and dynamical distortions around voids
Carlos M. Correa, Dante J. Paz, Nelson D. Padilla +3
We present a new cosmological test using the distribution of galaxies around cosmic voids without assuming a fiducial cosmology. The test is based on a physical model for the void-…
Structure and dynamics in low density regions: galaxy-galaxy correlations inside cosmic voids
Andrés N. Ruiz, Ignacio G. Alfaro, Diego Garcia Lambas
We compute the galaxy-galaxy correlation function of low-luminosity SDSS-DR7 galaxies inside cosmic voids identified in a volume limited s…
Voids and Superstructures: correlations and induced large-scale velocity flows
Marcelo Lares, Haliana Luparello, Victoria Maldonado +4
The expanding complex pattern of filaments, walls and voids build the evolving cosmic web with material flowing from underdense onto high density regions. Here we explore the dynam…
The sparkling Universe: Clustering of voids and void clumps
Marcelo Lares, Andrés N. Ruiz, Heliana E. Luparello +3
We analyse the clustering of cosmic voids using a numerical simulation and the main galaxy sample from the Sloan Digital Sky Survey. We take into account the classification of void…
The sparkling Universe: a scenario for cosmic void motions
Laura Ceccarelli, Andrés N. Ruiz, Marcelo Lares +4
We perform a statistical study of the global motion of cosmic voids using both a numerical simulation and observational data. We analyse their relation to large-scale mass flows an…
The sparkling Universe: the coherent motions of cosmic voids
Diego G. Lambas, Marcelo Lares, Laura Ceccarelli +4
We compute the bulk motions of cosmic voids, using a CDM numerical simulation considering the mean velocities of the dark matter inside the void itself and that of the haloes in…
Clues on void evolution III: Structure and dynamics in void shells
A. N. Ruiz, D. J. Paz, M. Lares +3
Inspired on the well known dynamical dichotomy predicted in voids, where some underdense regions expand whereas others collapse due to overdense surrounding regions, we explored th…
The nebular emission of star-forming galaxies in a hierarchical universe
Alvaro Orsi, Nelson Padilla, Brent Groves +4
Galaxy surveys targeting emission lines are characterising the evolution of star-forming galaxies, but there is still little theoretical progress in modelling their physical proper…
Chemo-Archaeological Downsizing in a Hierarchical Universe: Impact of a Top Heavy IGIMF
I. D. Gargiulo, S. A. Cora, N. D. Padilla +6
We make use of a semi-analytical model of galaxy formation to investigate the origin of the observed correlation between [a/Fe] abundance ratios and stellar mass in elliptical gala…
Subhaloes gone Notts: Subhaloes as tracers of the dark matter halo shape
Kai Hoffmann, Susana Planelles, Enrique Gaztanaga +14
We study the shapes of subhalo distributions from four dark-matter-only simulations of Milky Way type haloes. Comparing the shapes derived from the subhalo distributions at high re…
Calibration of semi-analytic models of galaxy formation using Particle Swarm Optimization
Andrés N. Ruiz, Sofía A. Cora, Nelson D. Padilla +8
We present a fast and accurate method to select an optimal set of parameters in semi-analytic models of galaxy formation and evolution (SAMs). Our approach compares the results of…
Structure Finding in Cosmological Simulations: The State of Affairs
Alexander Knebe, Frazer R. Pearce, Hanni Lux +32
The ever increasing size and complexity of data coming from simulations of cosmic structure formation demands equally sophisticated tools for their analysis. During the past decade…
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…