191 citations · 1.5k across the 42 of their papers we have counts for
42 papers
Environmental effects on associations of dwarf galaxies
C. Yamila Yaryura, Mario G. Abadi, Stefan Gottlöber +5
We study the properties of associations of dwarf galaxies and their dependence on the environment. Associations of dwarf galaxies are extended systems composed exclusively of dwarf…
Backsplash galaxies and their impact on galaxy evolution: a three-stage, four-type perspective
Andrés N. Ruiz, Héctor J. Martínez, Valeria Coenda +4
We study the population of backsplash galaxies at in the outskirts of massive, isolated clusters of galaxies taken from the MDPL2-SAG semi-analytic catalogue. We consider fou…
Hickson-like compact groups inhabiting different environments
A. Taverna, J. M. Salerno, I. V. Daza-Perilla +4
Although Compact Groups of galaxies (CGs) have been envisioned as isolated extremely dense structures in the Universe, it is accepted today that many of them could be not as isolat…
Reconstructing Orbits of Galaxies in Extreme Regions (ROGER) III: galaxy evolution patterns in projected phase space around massive X-ray clusters
Hector J. Martinez, Valeria Coenda, Hernan Muriel +2
We use the ROGER code by de los Rios et al. to classify galaxies around a sample of X-ray clusters into five classes according to their positions in the projected phase space diagr…
Local and large-scale effects on the astrophysics of void-galaxies
Agustín M. Rodríguez-Medrano, Dante J. Paz, Federico A. Stasyszyn +3
Galaxies in cosmic voids have been reported with properties related to a delayed evolution with respect to the Universe in general. These characteristics reflect the interaction of…
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…
Reconstructing Orbits of Galaxies in Extreme Regions (ROGER) II: reliability of projected phase-space in our understanding of galaxy populations
Valeria Coenda, Martín de los Rios, Hernán Muriel +4
We connect galaxy properties with their orbital classification by analysing a sample of galaxies with stellar mass residing in and around mas…
On the environmental influence of groups and clusters of galaxies beyond the virial radius: Galactic conformity at few Mpc scales
Ivan Lacerna, Facundo Rodriguez, Antonio D. Montero-Dorta +6
The environment within dark matter haloes can quench the star formation of galaxies. However, environmental effects beyond the virial radius of haloes ( 1 Mpc) are less ev…
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…
Overdensity of VVV galaxies behind the Galactic bulge
Daniela Galdeano, Luis Pereyra, Fernanda Duplancic +7
We studied a region of 1.636 square degrees corresponding to the VVV tile . Using SExtractor, we analysed photometric data generating a catalogue of extended sources in this…
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…
ROGER: Reconstructing Orbits of Galaxies in Extreme Regions using machine learning techniques
Martín de los Rios, Héctor Julián Martínez, Valeria Coenda +4
We present the ROGER (Reconstructing Orbits of Galaxies in Extreme Regions) code, which uses three different machine learning techniques to classify galaxies in, and around, cluste…
Associations of dwarf galaxies in a CDM Universe
C. Y. Yaryura, M. G. Abadi, S. Gottlober +6
Associations of dwarf galaxies are loose systems composed exclusively of dwarf galaxies. These systems were identified in the Local Volume for the first time more than thirty years…
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…
Semi-Analytic Galaxies - I. Synthesis of environmental and star-forming regulation mechanisms
Sofía A. Cora, Cristian A. Vega-Martínez, Tomás Hough +8
We present results from the semi-analytic model of galaxy formation SAG applied on the MultiDark simulation MDPL2. SAG features an updated supernova (SN) feedback scheme and a robu…
Cosmic CARNage I: on the calibration of galaxy formation models
Alexander Knebe, Frazer R. Pearce, Violeta Gonzalez-Perez +31
We present a comparison of nine galaxy formation models, eight semi-analytical and one halo occupation distribution model, run on the same underlying cold dark matter simulation (c…