The eventful life journey of galaxy clusters. I. Impact of DM halo and ICM properties on their full assembly histories

Abstract

Context. Galaxy clusters assemble over gigayears in a very anisotropic environment, which causes a remarkable diversity in their mass assembly histories (MAH). Aims. In this work, we have aimed to understand how the present-day properties of the dark matter halo and the intracluster medium are related to the whole evolution of these structures. Methods. To this end, we analysed a $\Lambda$CDM hydrodynamical+$N$-Body simulation of a $(100h^{-1}\mathrm{Mpc}{)}^3$ volume, containing over 30 clusters and 300 groups, and looked at the individual and the stacked MAHs (determined from complete merger trees) in relation to properties of the DM haloes and the ICM at fixed cosmic time (indicators of assembly state). Results. The ensemble MAHs are well separated when stacked in bins of these indicators, yielding clear dependencies of evolutionary properties (such as formation redshift) on fix-time halo properties. Additionally, we find that different indicators are informative about distinct epochs of accretion. Finally, by summarising the complex MAH diversity with two parameters, we describe how different indicators bring complementary information in different directions of this biparametric space. Overall, halo spin and a combined indicator appear to be the ones encoding the most information about the MAH. Conclusions. The results shown here add up to the idea that the dynamical state of cosmic structures is a multifaceted concept, and warn that single indicators are incapable of capturing the whole complexity of the process. This work sheds light on the nature of this characterisation by untangling precisely when and how several indicators are informative about. In turn, this can provide clues to better constrain the MAH of observed structures.

Accepted for publication in Astronomy & Astrophysics. 19 pages, 10 figures, 2 tables + appendices (3 pages, 4 figures, 2 tables)

References in corpus (33)

• Array Programming with NumPy
• The impact of mergers on relaxed X-ray clusters - I. Dynamical evolution and emergent transient structures
• The Assembly of Galaxy Clusters
• X-Ray morphological analysis of the Planck ESZ clusters
• Turbulence and Vorticity in Galaxy Clusters Generated by Structure Formation
• The Dependence of the Mass Assembly History of Cold Dark Matter Halos on Environment
• Towards a Holistic View of the Heating and Cooling of the Intracluster Medium
• Mass Accretion and its Effects on the Self-Similarity of Gas Profiles in the Outskirts of Galaxy Clusters
• Pressure of the hot gas in simulations of galaxy clusters
• The Three Hundred Project: Backsplash galaxies in simulations of clusters
• The impact of mergers on relaxed X-ray clusters - III. Effects on compact cool cores
• Coming of Age in the Dark Sector: How Dark Matter Haloes grow their Gravitational Potential Wells
• Concentrations of Dark Haloes Emerge from Their Merger Histories
• The ALMaQUEST Survey IX: The nature of the resolved star forming main sequence
• On the Correlation between Spin Parameter and Halo Mass
• Large-Scale Structure Formation: from the first non-linear objects to massive galaxy clusters
• A joint SZ-Xray-optical analysis of the dynamical state of 288 massive galaxy clusters
• Correlations between Triaxial Shapes and Formation History of Dark Matter Haloes
• The Three Hundred Project: quest of clusters of galaxies morphology and dynamical state through Zernike Polynomials
• On the accretion history of galaxy clusters: temporal and spatial distribution
• On the Cluster Physics of Sunyaev-Zel'dovich and X-ray Surveys IV: Characterizing Density and Pressure Clumping due to Infalling Substructures
• Properties of clumps and filaments around galaxy clusters
• Redshift evolution of the dark matter haloes shapes
• Troubled cosmic flows: turbulence, enstrophy and helicity from the assembly history of the intracluster medium
• A disturbing FABLE of mergers, feedback, turbulence, and mass biases in simulated galaxy clusters
• Mass accretion rates of clusters of galaxies: CIRS and HeCS
• The Hateful Eight: Connecting Massive Substructures in Galaxy Clusters like Abell 2744 to their Dynamical Assembly State using the Magneticum Simulations
• On the choice of the most suitable indicator for the assembly state of dark matter haloes through cosmic time
• Reconsidering the dynamical states of galaxy clusters using PCA and UMAP
• The effect of cluster dynamical state on ram-pressure stripping
• Cosmic accretion shocks as a tool to measure the dark matter mass of galaxy clusters
• The imprints of galaxy cluster internal dynamics on the Sunyaev-Zeldovich effect
• The impact of baryons on the sparsity of simulated galaxy clusters from The Three Hundred Project

Cited by in corpus (4)

• Intra-Cluster Light as a Dynamical Clock for Galaxy Clusters: Insights from the MAGNETICUM, IllustrisTNG, Hydrangea and Horizon-AGN Simulations
• Estimating infall times of galaxies around clusters: how accurately can it be done with observational data?
• The eventful life journey of galaxy clusters. II. Impact of mass accretion on the thermodynamical structure of the ICM
• The signature of major mergers on the hydrostatic mass bias of galaxy clusters