Simulating Groups and the IntraGroup Medium: The Surprisingly Complex and Rich Middle Ground Between Clusters and Galaxies

Abstract

Galaxy groups are more than an intermediate scale between clusters and halos hosting individual galaxies, they are crucial laboratories capable of testing a range of astrophysics from how galaxies form and evolve to large scale structure (LSS) statistics for cosmology. Cosmological hydrodynamic simulations of groups on various scales offer an unparalleled testing ground for astrophysical theories. Widely used cosmological simulations with ~(100 Mpc)^3 volumes contain statistical samples of groups that provide important tests of galaxy evolution influenced by environmental processes. Larger volumes capable of reproducing LSS while following the redistribution of baryons by cooling and feedback are essential tools necessary to constrain cosmological parameters. Higher resolution simulations can currently model satellite interactions, the processing of cool (T~10^4 K) multi-phase gas, and non-thermal physics including turbulence, magnetic fields, and cosmic ray transport. We review simulation results regarding the gas and stellar contents of groups, cooling flows and the relation to the central galaxy, the formation and processing of multi-phase gas, satellite interactions with the intragroup medium, and the impact of groups for cosmological parameter estimation. Cosmological simulations provide evolutionarily consistent predictions of these observationally difficult-to-define objects, and have untapped potential to accurately model their gaseous, stellar, and dark matter distributions.

61 pages, 18 figures, and 2 tables. This review article is part of the special issue "The Physical Properties of the Groups of Galaxies", edited by L. Lovisari and S. Ettori. Published in MDPI - Universe: https://www.mdpi.com/journal/universe/special_issues/PPGG

References in corpus (95)

• The EAGLE project: Simulating the evolution and assembly of galaxies and their environments
• Introducing the Illustris Project: Simulating the coevolution of dark and visible matter in the Universe
• The hierarchical formation of the brightest cluster galaxies
• The EAGLE simulations of galaxy formation: calibration of subgrid physics and model variations
• Simulating galaxy formation with black hole driven thermal and kinetic feedback
• Simba: Cosmological Simulations with Black Hole Growth and Feedback
• The Circumgalactic Medium
• Introducing the Illustris Project: the evolution of galaxy populations across cosmic time
• The effect of photo-ionization on the cooling rates of enriched, astrophysical plasmas
• A unified model for AGN feedback in cosmological simulations of structure formation
• Star Formation and Feedback in Smoothed Particle Hydrodynamic Simulations--I. Isolated Galaxies
• Smoothed Particle Hydrodynamics and Magnetohydrodynamics
• Chemical enrichment in cosmological, smoothed particle hydrodynamics simulations
• Cosmological Simulations of Intergalactic Medium Enrichment from Galactic Outflows
• The Role of Pressure in GMC Formation II: The H_2 - Pressure Relation
• Galaxy Zoo: the dependence of morphology and colour on environment
• Intracluster Medium Entropy Profiles for a Chandra Archival Sample of Galaxy Clusters
• Direct cosmological simulations of the growth of black holes and galaxies
• Mass, Metal, and Energy Feedback in Cosmological Simulations
• xCOLD GASS: the complete IRAM-30m legacy survey of molecular gas for galaxy evolution studies
• The 2013 Release of Cloudy
• eROSITA Science Book: Mapping the Structure of the Energetic Universe
• The Canadian Cluster Comparison Project: detailed study of systematics and updated weak lensing masses
• Baryon effects on the internal structure of LCDM halos in the EAGLE simulations
• Chemical enrichment of galaxy clusters from hydrodynamical simulations
• Time-Dependent Ionization in Radiatively Cooling Gas
• Grackle: a Chemistry and Cooling Library for Astrophysics
• How special are Brightest Group and Cluster Galaxies?
• Galaxy Groups in the SDSS DR4: II. halo occupation statistics
• Stellar and total baryon mass fractions in groups and clusters since redshift 1
• Systematics in the X-ray Cluster Mass Estimators
• The dark nemesis of galaxy formation: why hot haloes trigger black hole growth and bring star formation to an end
• Dark Matter Substructure in Numerical Simulations: A Tale of Discreteness Noise, Runaway Instabilities, and Artificial Disruption
• Feedback Heating by Cosmic Rays in Clusters of Galaxies
• The Importance of Mergers for the Origin of Intracluster Stars in Cosmological Simulations of Galaxy Clusters
• Scaling Properties of a Complete X-ray Selected Galaxy Group Sample
• Draping of Cluster Magnetic Fields over Bullets and Bubbles -- Morphology and Dynamic Effects
• Cold gas stripping in satellite galaxies: from pairs to clusters
• Regulation of star formation in giant galaxies by precipitation, feedback, and conduction
• Probing Galactic Halos with Fast Radio Bursts
• Raining on black holes and massive galaxies: the top-down multiphase condensation model
• Simulations of AGN feedback in galaxy clusters and groups: impact on gas fractions and the Lx-T scaling relation
• A refined sub-grid model for black hole accretion and AGN feedback in large cosmological simulations
• Resolving small-scale cold circumgalactic gas in TNG50
• Morphology and star formation in IllustrisTNG: the build-up of spheroids and discs
• Off the Beaten Path: A New Approach to Realistically Model The Orbital Decay of Supermassive Black Holes in Galaxy Formation Simulations
• Dark matter halo properties of GAMA galaxy groups from 100 square degrees of KiDS weak lensing data
• X-ray cavities in a sample of 83 SPT-selected clusters of galaxies: Tracing the evolution of AGN feedback in clusters of galaxies out to z=1.2
• Linking Macro, Meso, and Micro Scales in Multiphase AGN Feeding and Feedback
• The galaxy-halo connection from a joint lensing, clustering and abundance analysis in the CFHTLenS/VIPERS field
• Ram pressure feeding super-massive black holes
• Star formation quenching in simulated group and cluster galaxies: When, how, and why?
• Resurrecting the Red from the Dead: Optical Properties of BCGs in X-ray Luminous Clusters
• On the Origin of Cores in Simulated Galaxy Clusters
• Feedback from Active Galactic Nuclei in Galaxy Groups
• Towards a Holistic View of the Heating and Cooling of the Intracluster Medium
• Cosmic ray-driven galactic winds: streaming or diffusion?
• Radiative cooling rates, ion fractions, molecule abundances and line emissivities including self-shielding and both local and metagalactic radiation fields
• Overconsumption, outflows and the quenching of satellite galaxies
• Galaxies in the Illustris simulation as seen by the Sloan Digital Sky Survey - II: Size-luminosity relations and the deficit of bulge-dominated galaxies in Illustris at low mass
• Scaling Properties of Galaxy Groups
• The Complete Local Volume Groups Sample - I. Sample Selection and X-ray Properties of the High-Richness Subsample
• Cycling of the powerful AGN in MS 0735.6+7421 and the duty cycle of radio AGN in Clusters
• The dependence of cosmic ray driven galactic winds on halo mass
• A hydrodynamical halo model for weak-lensing cross correlations
• Physical viscosity in smoothed particle hydrodynamics simulations of galaxy clusters
• Southern GEMS Groups I: Dynamical Properties
• The environmental dependence of gas accretion onto galaxies: quenching satellites through starvation
• Galaxy And Mass Assembly (GAMA): Environmental Quenching of Centrals and Satellites in Groups
• Enrichment and Pre-Heating in Intragroup Gas from Galactic Outflows
• Disruption of satellite galaxies in simulated groups and clusters: the roles of accretion time, baryons, and pre-processing
• An EAGLE's View of Ex-situ Galaxy Growth
• The luminosity -- halo-mass relation for brightest cluster galaxies
• On The Efficiency of Jet Production in Radio Galaxies
• Evidence for recent star formation in BCGs: a correspondence between blue cores and UV excess
• The high molecular gas content, and the efficient conversion of neutral into molecular gas, in jellyfish galaxies
• The Outer Halos of Very Massive Galaxies: BCGs and their DSC in the Magneticum Simulations
• The contributions of matter inside and outside of haloes to the matter power spectrum
• Correlation Between the Total Gravitating Mass of Groups and Clusters and the Supermassive Black Hole Mass of Brightest Galaxies
• Star formation rates and stellar masses from machine learning
• The EAGLE simulations of galaxy formation: Public release of particle data
• The better half -- Asymmetric star-formation due to ram pressure in the EAGLE simulations
• The origin of the enhanced metallicity of satellite galaxies
• The Impact of the Group Environment on the OVI Circumgalactic Medium
• Testing Cold Dark Matter with the hierarchical buildup of stellar light
• Molecular hydrogen in IllustrisTNG galaxies: carefully comparing signatures of environment with local CO & SFR data
• Constraining star formation rates in cool-core brightest cluster galaxies
• Galaxy And Mass Assembly: search for a population of high-entropy galaxy groups
• Extending the $L_{\mathrm{X}}-T$ relation from clusters to groups-Impact of cool core nature, AGN feedback, and selection effects
• Discovery of an HI-rich Gas Reservoir in the Outskirts of SZ-effect Selected Clusters
• The challenging task of determining star formation rates: the case of a massive stellar burst in the brightest cluster galaxy of Phoenix galaxy cluster
• C IV absorbers tracing cool gas in dense galaxy group/cluster environments
• The special growth history of central galaxies in groups and clusters
• The Stellar Mass Assembly of Low Redshift, Massive, Central Galaxies in SDSS and the TNG300 simulation
• Toward the low-scatter selection of X-ray clusters: Galaxy cluster detection with eROSITA through cluster outskirts