66 citations · 568 across the 47 of their papers we have counts for
24 papers · 1 filter
Euclid preparation. The shape of halo profiles in CDM and non-standard cosmologies
Euclid Collaboration, L. Pizzuti, G. Y. Ferron +304
We study the shape of three-dimensional and projected dark-matter halo profiles extracted from cosmological -body simulations in CDM and non-standard cosmologies, using the \…
Searching for signatures of self-interacting dark matter in halos from full physics simulations: From 3D structure to projected observables
Giovanni Y. Ferron, Antonio Ragagnin, Lorenzo Pizzuti +1
In this work we explore the imprints of self-interacting dark matter (SIDM) on the structure of simulated galaxy groups and clusters in view of future optical surveys. We find that…
Dianoga simulations of galaxy clusters and groups: Properties of the baryonic components
Stefano Borgani, Alice Damiano, Elena Rasia +12
We introduce the Dianoga set of cosmological simulations of galaxy clusters and groups, specifically aimed at studying the impact of the implementation of AGN feedback and star for…
Euclid: Impact of halo mass-conversion model assumptions on galaxy cluster number-count analyses
T. Gayoux, P. -S. Corasaniti, T. R. G. Richardson +153
The large catalogues of galaxy clusters expected from the Euclid survey will enable cosmological analyses of cluster number counts that require accurate cosmological model predicti…
Euclid preparation LXIII. Simulations and nonlinearities beyond CDM. 2. Results from non-standard simulations
Euclid Collaboration, G. Rácz, M. -A. Breton +275
The Euclid mission will measure cosmological parameters with unprecedented precision. To distinguish between cosmological models, it is essential to generate realistic mock observa…
Dianoga SIDM: galaxy cluster self-interacting dark matter simulations
Antonio Ragagnin, Massimo Meneghetti, Francesco Calura +5
This work aims at assessing the impact of DM self-interactions on the properties of galaxy clusters. In particular, the goal is to study the angular dependence of the cross section…
Dynamical friction and evolution of black holes in cosmological simulations: a new implementation in OpenGadget3
Alice Damiano, Milena Valentini, Stefano Borgani +5
We implement a sub-resolution prescription for the unresolved dynamical friction onto black holes (BHs) in the OpenGadget3 code. We carry out cosmological simulations of a volume o…
Euclid preparation. XXXIX. The effect of baryons on the Halo Mass Function
Euclid Collaboration, T. Castro, S. Borgani +220
The Euclid photometric survey of galaxy clusters stands as a powerful cosmological tool, with the capacity to significantly propel our understanding of the Universe. Despite being…
Cosmological and idealized simulations of dark matter haloes with velocity-dependent, rare and frequent self-interactions
Moritz S. Fischer, Lenard Kasselmann, Marcus Brüggen +5
Dark matter self-interactions may have the capability to solve or at least mitigate small-scale problems of the cosmological standard model, Lambda Cold Dark Matter. There are a va…
A persistent excess of galaxy-galaxy strong lensing observed in galaxy clusters
Massimo Meneghetti, Weiguang Cui, Elena Rasia +18
Previous studies have revealed that the estimated probability of galaxy-galaxy strong lensing in observed galaxy clusters exceeds the expectations from the Cold Dark Matter cos…
Weak lensing mass bias and the alignment of center proxies
Martin W. Sommer, Tim Schrabback, Antonio Ragagnin +1
Galaxy cluster masses derived from observations of weak lensing suffer from a number of biases affecting the accuracy of mass-observable relations calibrated from such observations…
On the redshift evolution of the baryon and gas fraction in simulated groups and clusters of galaxies
M. Angelinelli, S. Ettori, K. Dolag +2
We study the redshift evolution of the baryon budget in a large set of galaxy clusters from the {\it Magneticum} suite of SPH cosmological simulations. At high redshifts, we obtain…
Simulation view of galaxy clusters with low X-ray surface brightness
Antonio Ragagnin, Stefano Andreon, Emanuella Puddu
X-ray selected samples are known to miss galaxy clusters that are gas poor and have a low surface brightness. This is different for the optically selected samples such as the X-ray…
Euclid preparation. XXIV. Calibration of the halo mass function in CDM cosmologies
Euclid Collaboration, T. Castro, A. Fumagalli +179
Euclid's photometric galaxy cluster survey has the potential to be a very competitive cosmological probe. The main cosmological probe with observations of clusters is their number…
Cosmological simulations with rare and frequent dark matter self-interactions
Moritz S. Fischer, Marcus Brüggen, Kai Schmidt-Hoberg +4
Dark matter (DM) with self-interactions is a promising solution for the small-scale problems of the standard cosmological model. Here we perform the first cosmological simulation o…
Galaxies in the central regions of simulated galaxy clusters
Antonio Ragagnin, Massimo Meneghetti, Luigi Bassini +20
In this paper, we assess the impact of numerical resolution and of the implementation of energy input from AGN feedback models on the inner structure of cluster sub-haloes in hydro…
The probability of galaxy-galaxy strong lensing events in hydrodynamical simulations of galaxy clusters
Massimo Meneghetti, Antonio Ragagnin, Stefano Borgani +27
Meneghetti et al. (2020) recently reported an excess of galaxy-galaxy strong lensing (GGSL) in galaxy clusters compared to expectations from the LCDM cosmological model. Theoretica…
The BEHOMO project: LTB -body simulations
V. Marra, T. Castro, D. Camarena +2
Our Universe may feature large-scale inhomogeneities and anisotropies which cannot be explained by the standard model of cosmology, that is, the homogeneous and isotropic FLRW metr…
Satellite galaxy abundance dependency on cosmology in Magneticum simulations
Antonio Ragagnin, Alessandra Fumagalli, Tiago Castro +4
Context: Modelling satellite galaxy abundance in Galaxy Clusters (GCs) is a key element in modelling the Halo Occupation Distribution (HOD), which itself is a powerful tool t…
Unequal-mass mergers of dark matter haloes with rare and frequent self-interactions
Moritz S. Fischer, Marcus Brüggen, Kai Schmidt-Hoberg +3
Dark matter (DM) self-interactions have been proposed to solve problems on small length scales within the standard cold DM cosmology. Here, we investigate the effects of DM self-in…
Thermodynamic evolution of the galaxy cluster IDCS J1426.5+3508
S. Andreon, C. Romero, F. Castagna +8
We present resolved thermodynamic profiles out to 500 kpc, about , of the galaxy cluster IDCS J1426.5+3508 with 40 kpc resolution. Thanks to the combination of Su…
Cosmology dependency of halo masses and concentrations in hydrodynamic simulations
Antonio Ragagnin, Alexandro Saro, Priyanka Singh +1
We employ a set of Magneticum cosmological hydrodynamic simulations that span over different cosmologies, and extract masses and concentrations of all well-resolved haloes bet…
On the phase-space structure of galaxy clusters from cosmological simulations
I. Marini, A. Saro, S. Borgani +8
Cosmological N-body simulations represent an excellent tool to study the formation and evolution of dark matter (DM) halos and the mechanisms that have originated the universal pro…
Dependency of halo concentration on mass, redshift and fossilness in Magneticum hydrodynamic simulations
Antonio Ragagnin, Klaus Dolag, Lauro Moscardini +2
We study the dependency of the concentration on mass and redshift using three large N-body cosmological hydrodynamic simulations carried out by the Magneticum project. We constrain…