267 citations · 724 across the 20 of their papers we have counts for
24 papers
TNGC-SIDM I: Evolution of massive cluster mergers under the self-interacting dark matter paradigm
Wonki Lee, Dylan Nelson, Myungkook J. Jee +8
Merging galaxy clusters provide an ideal laboratory for testing the self-interacting nature of dark matter. In this paper, we present a pilot study of magnetohydrodynamical cosmolo…
Galaxy and Halo Assembly Bias in Alternative Dark Matter Models
Yikun Wang, Idit Zehavi, Sergio Contreras +6
The clustering of dark matter halos depends not only on halo mass but also on secondary halo properties, a phenomenon known as halo assembly bias. Coupled with variations in halo o…
Lower central dark matter densities in nearby galaxies than predicted by simulations
Yu Lei, Ling Zhu, Meng Yang +9
Baryonic feedback in hydrodynamical simulations is typically invoked to alleviate the core--cusp problem in dwarf galaxies. Yet baryonic processes also induce adiabatic contraction…
Euclid Quick Data Release (Q1). The Strong Lensing Discovery Engine F -- Bright and low-redshift strong lenses
Euclid Collaboration, L. R. Ecker, M. Fabricius +346
We present 72 additional galaxy-galaxy strong lenses that complement the sample discovered in the Euclid Quick Release 1 data (63.1 deg^2) of the Strong Lens Discovery Engine (SLDE…
Gas distributions inside and around haloes in the alternative dark matter simulations AIDA-TNG
Chi Zhang, Enrico Garaldi, Giulia Despali +3
The nature of Dark Matter (DM) is one of the greatest mysteries of modern astrophysics. While the standard Cold DM (CDM) model successfully explains observations on most astrophysi…
The AIDA-TNG project: dark matter profiles and concentrations in alternative dark matter models
Giulia Despali, Carlo Giocoli, Lauro Moscardini +3
In the standard Cold Dark Matter (CDM) scenario, the density profiles of dark matter haloes are well described by analytical models linking their concentration to halo mass. Altern…
The AIDA-TNG project: 3D halo shapes
C. Giocoli, G. Despali, L. Moscardini +4
Context. The shapes of dark matter halos can be used to constrain the fundamental properties of dark matter. In standard Cold Dark Matter (CDM) cosmologies, halos are typically tri…
The AIDA-TNG project. Abundance, radial distribution, and clustering properties of halos in alternative dark matter models
Massimiliano Romanello, Giulia Despali, Federico Marulli +3
Warm and self-interactive dark matter cosmologies have been proposed as nonbaryonic solutions to the tensions between the cold dark matter model and observations at the kilopar…
Self-interacting dark matter in the center of a Local Group dwarf galaxy and its satellites
Thales A. Gutcke, Giulia Despali, Stephanie O'Neil +3
We present a detailed comparison of a Local Group dwarf galaxy analogue evolved in two cosmological models: the standard CDM and a self-interacting dark matter (SIDM) model with…
The Three Hundred Project hydrodynamical simulations: Hydrodynamical weak-lensing cluster mass biases and richnesses using different hydro models
Carlo Giocoli, Giulia Despali, Massimo Meneghetti +7
The mass of galaxy clusters estimated from weak-lensing observations is affected by projection effects, leading to a systematic underestimation compared to the true cluster mass, v…
Introducing the AIDA-TNG project: galaxy formation in alternative dark matter models
Giulia Despali, Lauro Moscardini, Dylan Nelson +3
We introduce the AIDA-TNG project, a suite of cosmological magnetohydrodynamic simulations that simultaneously model galaxy formation and different variations of the underlying dar…
The energy shear of protohaloes
Marcello Musso, Giulia Despali, Ravi K. Sheth
As it collapses to form a halo, the shape of a protohalo patch is deformed by the initial shear field. This deformation is often modeled using the "deformation" tensor, constructed…
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…
AMICO galaxy clusters in KiDS-DR3: measuring the splashback radius from weak gravitational lensing
Carlo Giocoli, Lorenzo Palmucci, Giorgio F. Lesci +13
Context. Weak gravitational lensing offers a powerful method to investigate the projected matter density distribution within galaxy clusters, granting crucial insights into the bro…
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…
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…
Accretion of satellites onto central galaxies in clusters: merger mass ratios and orbital parameters
Carlo Nipoti, Carlo Giocoli, Giulia Despali
We study the statistical properties of mergers between central and satellite galaxies in galaxy clusters in the redshift range , using a sample of dark-matter only cosmologi…
A look to the inside of haloes: a characterisation of the halo shape as a function of overdensity in the Planck cosmology
Giulia Despali, Carlo Giocoli, Mario Bonamigo +2
In this paper we study the triaxial properties of dark matter haloes of a wide range of masses extracted from a set of cosmological N-body simulations. We measure the shape at diff…
Characterising Strong Lensing Galaxy Clusters using the Millennium-XXL and MOKA simulations
Carlo Giocoli, Mario Bonamigo, Marceau Limousin +5
In this paper we investigate the strong lensing statistics in galaxy clusters. We extract dark matter haloes from the Millennium-XXL simulation, compute their Einstein radius distr…
The universality of the virial halo mass function and models for non-universality of other halo definitions
Giulia Despali, Carlo Giocoli, Raul E. Angulo +4
The abundance of galaxy clusters can constrain both the geometry and growth of structure in our Universe. However, this probe could be significantly complicated by recent claims of…
Universality of dark matter haloes shape over six decades in mass: Insights from the Millennium XXL and SBARBINE simulations
Mario Bonamigo, Giulia Despali, Marceau Limousin +3
For the last 30 years many observational and theoretical evidences have shown that galaxy clusters are not spherical objects, and that their shape is much better described by a tri…
Some like it triaxial: the universality of dark matter halo shapes and their evolution along the cosmic time
Giulia Despali, Carlo Giocoli, Giuseppe Tormen
We present a detailed analysis of dark matter halo shapes, studying how the distributions of ellipticity, prolateness and axial ratios evolve as a function of time and mass. With t…
Ellipsoidal halo finders and implications for models of triaxial halo formation
Giulia Despali, Giuseppe Tormen, Ravi K. Sheth
We describe an algorithm for identifying ellipsoidal haloes in numerical simulations, and quantify how the resulting estimates of halo mass and shape differ with respect to spheric…