199 citations · 2.6k across the 48 of their papers we have counts for
27 papers · 1 filter
On the origin of the evolution of the halo occupation distribution
Sergio Contreras, Idit Zehavi
We use the TNG300 magneto-hydrodynamic simulation and mock catalogues built using subhalo abundance matching (SHAM) to study the origin of the redshift evolution of the halo occupa…
Consistent clustering and lensing of SDSS-III BOSS galaxies with an extended abundance matching formalism
Sergio Contreras, Jonás Chaves-Montero, Raul E. Angulo
Several analyses have shown that LCDM-based models cannot jointly describe the clustering (GC) and galaxy-galaxy lensing (GGL) of galaxies in the SDSS-III BOSS survey, which is com…
DES Y3 cosmic shear down to small scales: constraints on cosmology and baryons
Giovanni Aricò, Raul E. Angulo, Matteo Zennaro +3
We present the first analysis of cosmic shear measured in DES Y3 that employs the entire range of angular scales in the data. To achieve this, we build upon recent advances in the…
Consistent and simultaneous modelling of galaxy clustering and galaxy-galaxy lensing with Subhalo Abundance Matching
Sergio Contreras, Raul E. Angulo, Jonás Chaves-Montero +2
The spatial distribution of galaxies and their gravitational lensing signal offer complementary tests of galaxy formation physics and cosmology. However, their synergy can only be…
The galaxy formation origin of the lensing is low problem
Jonas Chaves-Montero, Raul E. Angulo, Sergio Contreras
Recent analyses show that CDM-based models optimised to reproduce the clustering of massive galaxies overestimate their gravitational lensing by about 30\%, the so-called lensin…
The MillenniumTNG Project: An improved two-halo model for the galaxy-halo connection of red and blue galaxies
Boryana Hadzhiyska, Daniel Eisenstein, Lars Hernquist +11
Approximate methods to populate dark matter halos with galaxies are of great utility to large galaxy surveys. However, the limitations of simple halo occupation models (HODs) precl…
The MillenniumTNG Project: Refining the one-halo model of red and blue galaxies at different redshifts
Boryana Hadzhiyska, Lars Hernquist, Daniel Eisenstein +11
Luminous red galaxies (LRGs) and blue star-forming emission-line galaxies (ELGs) are key tracers of large-scale structure used by cosmological surveys. Theoretical predictions for…
The cosmology dependence of the concentration-mass-redshift relation
Daniel López-Cano, Raúl E. Angulo, Aaron D. Ludlow +4
The concentrations of dark matter haloes provide crucial information about their internal structure and how it depends on mass and redshift -- the so-called concentration-mass-reds…
The Bacco Simulation Project: Bacco Hybrid Lagrangian Bias Expansion Model in Redshift Space
Marcos Pellejero-Ibanez, Raul E. Angulo, Matteo Zennaro +4
We present an emulator that accurately predicts the power spectrum of galaxies in redshift space as a function of cosmological parameters. Our emulator is based on a 2nd-order Lagr…
Priors on Lagrangian bias parameters from galaxy formation modelling
Matteo Zennaro, Raul E. Angulo, Sergio Contreras +2
We study the relations among the parameters of the hybrid Lagrangian bias expansion model, fitting biased auto and cross power spectra up to $k_{\rm max} = 0.7 \, h \, \mathrm{Mpc}…
Modelling galaxy clustering in redshift space with a Lagrangian bias formalism and -body simulations
Marcos Pellejero-Ibanez, Jens Stuecker, Raul E. Angulo +3
Improving the theoretical description of galaxy clustering on small scales is an important challenge in cosmology, as it can considerably increase the scientific return of forthcom…
Predicting halo occupation and galaxy assembly bias with machine learning
Xiaoju Xu, Saurabh Kumar, Idit Zehavi +1
Understanding the impact of halo properties beyond halo mass on the clustering of galaxies (namely galaxy assembly bias) remains a challenge for contemporary models of galaxy clust…
Non-universality of the mass function: dependence on the growth rate and power spectrum shape
Lurdes Ondaro-Mallea, Raul E. Angulo, Matteo Zennaro +2
The abundance of dark matter haloes is one of the key probes of the growth of structure and expansion history of the Universe. Theoretical predictions for this quantity usually ass…
The BACCO simulation project: biased tracers in real space
Matteo Zennaro, Raul E. Angulo, Marcos Pellejero-Ibáñez +3
We present an emulator for the two-point clustering of biased tracers in real space. We construct this emulator using neural networks calibrated with more than cosmological m…
A flexible subhalo abundance matching model for galaxy clustering in redshift space
Sergio Contreras, Raul Angulo, Matteo Zennaro
We develop an extension of subhalo abundance matching (SHAM) capable of accurately reproducing the real and redshift-space clustering of galaxies in a state-of-the-art hydrodynamic…
The BACCO Simulation Project: A baryonification emulator with Neural Networks
Giovanni Aricò, Raul E. Angulo, Sergio Contreras +3
We present a neural-network emulator for baryonic effects in the non-linear matter power spectrum. We calibrate this emulator using more than 50,000 measurements in a 15-dimensiona…
Simultaneous modelling of matter power spectrum and bispectrum in the presence of baryons
Giovanni Aricò, Raul E. Angulo, Carlos Hernández-Monteagudo +2
We demonstrate that baryonification algorithms, which displace particles in gravity-only simulations according to physically-motivated prescriptions, can simultaneously capture the…
The BACCO Simulation Project: Exploiting the full power of large-scale structure for cosmology
Raul E. Angulo, Matteo Zennaro, Sergio Contreras +3
We present the BACCO project, a simulation framework specially designed to provide highly-accurate predictions for the distribution of mass, galaxies, and gas as a function of cosm…
Cosmological parameter estimation via iterative emulation of likelihoods
Marcos Pellejero-Ibañez, Raul E. Angulo, Giovanni Aricó +3
The interpretation of cosmological observables requires the use of increasingly sophisticated theoretical models. Since these models are becoming computationally very expensive and…
3\%-accurate predictions for the clustering of dark matter, haloes and subhaloes, over a wide range of cosmologies and scales
S. Contreras, R. E. Angulo, M. Zennaro +2
Predicting the spatial distribution of objects as a function of cosmology is an essential ingredient for the exploitation of future galaxy surveys. In this paper we show that a spe…
Modelling the large scale structure of the Universe as a function of cosmology and baryonic physics
Giovanni Aricò, Raul E. Angulo, Carlos Hernández-Monteagudo +4
We present and test a framework that models the three-dimensional distribution of mass in the Universe as a function of cosmological and astrophysical parameters. Our approach comb…
Extensions to the halo occupation distribution model for more accurate clustering predictions
Esteban Jiménez, Sergio Contreras, Nelson Padilla +3
We test different implementations of the halo occupation distribution (HOD) model to reconstruct the spatial distribution of galaxies as predicted by a publicly available semi-anal…
How to add massive neutrinos to your CDM simulation -- extending cosmology rescaling algorithms
Matteo Zennaro, Raúl E. Angulo, Giovanni Aricò +2
Providing accurate predictions for the spatial distribution of matter and luminous tracers in the presence of massive neutrinos is an important task, given the imminent arrival of…
The Effect of Assembly Bias on Redshift Space Distortions
Nelson Padilla, Sergio Contreras, Idit Zehavi +2
We study potential systematic effects of assembly bias on cosmological parameter constraints from redshift space distortion measurements. We use a semi-analytic galaxy formation mo…