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In this study, we investigate a recent finding based on strong lensing observations, which suggests that the sub-halos observed in clusters exhibit greater compactness compared to those predicted by $\Lambda$CDM simulations. To address this…

The distribution of baryons provides a significant way to understand the formation of galaxy clusters by revealing the details of its internal structure and changes over time. In this paper, we present theoretical studies on the scaled…

Next-generation photometric and spectroscopic surveys will detect faint galaxies in massive clusters, advancing our understanding of galaxy formation in dense environments. Comparing these observations with theoretical models requires…

Astrophysics of Galaxies · Physics 2025-05-19 Jonathan S. Gómez , Tomas Hough , Alejandro Jiménez Muñoz , Gustavo Yepes , Weiguang Cui , Sofía A. Cora

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, varying with both mass and redshift. The magnitude depends on…

Previous studies have revealed that the estimated probability of galaxy-galaxy strong lensing in observed galaxy clusters exceeds the expectations from the $\Lambda$ Cold Dark Matter cosmological model by one order of magnitude. We aim to…

Dark matter-only simulations are able to produce the cosmic structure of a $\Lambda$CDM universe, at a much lower computational cost than more physically motivated hydrodynamical simulations. However, it is not clear how well smaller…

Astrophysics of Galaxies · Physics 2021-01-12 Roan Haggar , Frazer R. Pearce , Meghan E. Gray , Alexander Knebe , Gustavo Yepes

The baryon fraction of galaxy clusters is a powerful tool to inform on the cosmological parameters while the hot-gas fraction provides indications on the physics of the intracluster plasma and its interplay with the processes driving galaxy…

We examine the splashback structure of galaxy clusters using hydrodynamical simulations from the GIZMO run of The Three Hundred Project, focusing on the relationship between the stellar and dark matter components. We dynamically decompose…

Astrophysics of Galaxies · Physics 2026-03-18 Kris Walker , Aaron Ludlow , Chris Power , Alexander Knebe , Weiguang Cui

We investigate the physical properties and detectability of warm-hot intergalactic medium (WHIM) gas with temperatures in the range $10^5<T<10^7$K around galaxy clusters using simulated galaxy clusters from The Three Hundred project. In…

Cosmology and Nongalactic Astrophysics · Physics 2025-09-03 Renjie Li , Weiguang Cui , Ang Liu , Huiyuan Wang , Atulit Srivastava , Romeel Dave , Frazer R. Pearce

Cluster number counts will be a key cosmological probe in the next decade thanks to the Euclid satellite mission. For this purpose, cluster detection algorithm performance, which are sensitive to the spatial distribution of the cluster…

Cosmology and Nongalactic Astrophysics · Physics 2024-06-19 A. Jiménez Muñoz , J. F. Macías-Pérez , G. Yepes , M. De Petris , A. Ferragamo , W. Cui , J. S. Gómez

Recent numerical studies of the dark matter density profiles of massive galaxy clusters ($M_{\rm halo} > 10^{15}$M$_{\odot}$) show that their median radial mass density profile remains unchanged up to $z > 1$, displaying a highly…

Using the catalogues of galaxy clusters from The Three Hundred project, modelled with both hydrodynamic simulations, (Gadget-X and Gadget-MUSIC), and semi-analytic models (SAMs), we study the scatter and self-similarity of the profiles and…

Using the galaxy clusters from The Three Hundred Project, we define a new parameter: $\lambda_{DS}$ to describe the dynamical state of clusters, which assumes a double-Gaussian distribution in logarithm scale for our mass-complete cluster…

Cosmology and Nongalactic Astrophysics · Physics 2022-08-17 Bowei Zhang , Weiguang Cui , Romeel Dave , Marco De Petris

The simulation database of THE THREE HUNDRED Project has been used to pick synthetic clusters of galaxies with properties close to the observational targets of the NIKA2 camera Sunyaev-Zeldovich (SZ) Large Program. Cross-matching of cluster…

Using the data set of The Three Hundred project, i.e. a suite of 324 hydrodynamical resimulations of cluster-sized haloes, we study galaxy cluster mergers and their effect on colour and luminosity changes of their brightest cluster galaxies…

Accurate and precise measurements of masses of galaxy clusters are key to derive robust constraints on cosmological parameters. Rising evidence from observations, however, confirms that X-ray masses, obtained under the assumption of…

Cosmology and Nongalactic Astrophysics · Physics 2020-02-19 S. Ansarifard , E. Rasia , V. Biffi , S. Borgani , W. Cui , M. De Petris , K. Dolag , S. Ettori , S. M. S. Movahed , G. Murante , G. Yepes

In the outer regions of a galaxy cluster, galaxies may be either falling into the cluster for the first time, or have already passed through the cluster centre at some point in their past. To investigate these two distinct populations, we…

Astrophysics of Galaxies · Physics 2020-02-12 Roan Haggar , Meghan E. Gray , Frazer R. Pearce , Alexander Knebe , Weiguang Cui , Robert Mostoghiu , Gustavo Yepes

Using 324 numerically modelled galaxy clusters as provided by THE THREE HUNDRED project, we study the evolution of the kinematic properties of the stellar component of haloes on first infall. We select objects with…

The knowledge of the dynamical state of galaxy clusters allows to alleviate systematics when observational data from these objects are applied in cosmological studies. Evidence of correlation between the state and the morphology of the…

Cosmology and Nongalactic Astrophysics · Physics 2021-01-06 Valentina Capalbo , Marco De Petris , Federico De Luca , Weiguang Cui , Gustavo Yepes , Alexander Knebe , Elena Rasia
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