Resolving the Structure of Cold Dark Matter Halos

Abstract

We examine the effects of mass resolution and force softening on the density profiles of cold dark matter halos that form within cosmological N-body simulations. As we increase the mass and force resolution, we resolve progenitor halos that collapse at higher redshifts and have very high densities. At our highest resolution we have nearly 3 million particles within the virial radius, several orders of magnitude more than previously used and we can resolve more than one thousand surviving dark matter halos within this single virialised system. The halo profiles become steeper in the central regions and we may not have achieved convergence to a unique slope within the inner 10% of the virialised region. Results from two very high resolution halo simulations yield steep inner density profiles, $\rho (r)\sim r^{-1.4}$. The abundance and properties of arcs formed within this potential will be different from calculations based on lower resolution simulations. The kinematics of disks within such a steep potential may prove problematic for the CDM model when compared with the observed properties of halos on galactic scales.

Final version, to be published in the ApJLetters

References in corpus (2)

• Fundamental Discreteness Limitations of Cosmological N-Body Clustering Simulations
• Theory of Protostellar Accretion

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• Toward Understanding the origin of the Fundamental Plane for Early-Type Galaxies
• A Comparison of Cosmological Models Using Strong Gravitational Lensing Galaxies
• X-ray Measurements of the Gravitational Potential Profile in the Central Region of the Abell 1060 Cluster of Galaxies
• A universal velocity distribution of relaxed collisionless structures
• Cosmological Three-Point Function: Testing The Halo Model Against Simulations
• Adaptive gravitational softening in GADGET
• Static Configurations of Dark Energy and Dark Matter
• Gamma Rays From Dark Matter Subhalos Revisited: Refining the Predictions and Constraints
• Particle Annihilation in Cold Dark Matter Micropancakes
• Could the Fermi-LAT detect gamma-rays from dark matter annihilation in the dwarf galaxies of the Local Group?
• Connecting Cluster Substructure in Galaxy Cluster Cores at z=0.2 With Cluster Assembly Histories
• 2dFGRS and SDSS Galaxy Group Density Profiles
• A family of models of partially relaxed stellar systems I. Dynamical properties
• Constraints on self-interacting Q-ball dark matter
• Halo Concentration and the Dark Matter Power Spectrum
• A reassessment of the data and models of the gravitational lens Q0957+561
• Degenerate sterile neutrino dark matter in the cores of galaxies
• Evidence for inhomogeneous reionization in the local Universe from metal-poor globular cluster systems
• Free streaming in mixed dark matter
• Fast Weak Lensing Simulations with Halo Model
• Density Profiles of Collisionless Equilibria. I. Spherical Isotropic Systems
• The polytropic approximation and X-ray scaling relations: constraints on gas and dark matter profiles for galaxy groups and clusters
• X-ray Radiation from the Annihilation of Dark Matter at the Galactic Center
• Noise-driven evolution in stellar systems: A universal halo profile
• Statistical properties of the dark matter haloes of dwarf galaxies and correlations with the environment
• The Observed Galactic Annihilation Line. Possible Signature of the Cluster for Accreting Small Mass Black Holes
• The role of star formation in the Tully-Fisher law
• Non-universality of halo profiles and implications for dark matter experiments
• The optimal gravitational softening length for cosmological N-body simulations
• Decaying Superheavy Dark Matter and Subgalactic Structure of the Universe
• Alas, the dark matter structures were not that trivial
• Constrained Cosmological Simulations of Dark Matter Halos
• Astrophysical and cosmological probes of dark matter
• The Three Hundred Project: Substructure in hydrodynamical and dark matter simulations of galaxy groups around clusters
• Source Ellipticity and the Statistics of Lensed Arcs
• The velocity anisotropy - density slope relation
• The GOGREEN survey: the internal dynamics of clusters of galaxies at redshift 0.9-1.4
• Gauge Mediated Supersymmetry Breaking and Multi-TeV Gamma-Rays from the Galactic Center
• Fornax globular cluster distributions: implications for the cusp-core problem
• Power Spectrum Normalisation and the Non-Gaussian Halo Model
• Effects of the halo concentration distribution on strong-lensing optical depth and X-ray emission
• Pair Correlations and Merger Bias
• The Accretion and Cooling of Preheated Gas in Dark Matter Halos
• The flat density profiles of massive, and relaxed galaxy clusters
• Probing dark matter crests with white dwarfs and IMBHs
• Might we eventually understand the origin of the dark matter velocity anisotropy?
• Is a Simple Collisionless Relic Dark Matter Particle Ruled Out?
• Separation of the visible and dark matter in the Einstein ring LBG J213512.73-010143
• Moderate Steepening of Galaxy Cluster Dark Matter Profiles by Baryonic Pinching
• On the early evolution of Local Group dwarf galaxy types: star formation and supernova feedback
• The cluster lens ACO 1703: redshift contrast and the inner profile
• Orbits in Extended Mass Distributions: General Results and the Spirographic Approximation
• N-Body Simulations of Growth from 1 km Planetesimals at 0.4 AU
• Dianoga SIDM: galaxy cluster self-interacting dark matter simulations
• The morphological mix of dwarf galaxies in the nearby Universe
• The Origin of Dark Matter Halo Profiles
• The global mass - to - light ratio of SLACS lenses
• Models of Distorted and Evolving Dark Matter Halos
• Gamma rays from the neutralino dark matter annihilations in the Milky Way substructures
• XMM-Newton observations of two X-ray bright galaxy groups - pushing out to r_500
• The origin and formation of cuspy density profiles through violent relaxation of stellar systems
• The Morphological decomposition of Abell A868
• Self-similar collapse and the structure of dark matter halos: A fluid approach
• Phase-space structures I: A comparison of 6D density estimators
• Detecting the Gravitational Redshift of Cluster Gas
• Dark Matter Halos: Velocity Anisotropy -- Density Slope Relation
• The Dark Matter Haloes of Chandra X-ray Galaxy Clusters and Baryons Effect
• Dipole-interacting Fermionic Dark Matter in positron, antiproton, and gamma-ray channels
• A new method for the estimate of H_0 from quadruply imaged gravitational lens systems
• Numerical convergence of physical variables in hydrodynamical simulations of cooling clusters
• Cosmological and idealized simulations of dark matter haloes with velocity-dependent, rare and frequent self-interactions
• Embedding globular clusters in dark matter minihalos solves the cusp-core and timing problems in the Fornax dwarf galaxy
• Black hole -- galaxy scaling relations in FIRE: the importance of black hole location and mergers
• Galaxy halo expansions: a new biorthogonal family of potential-density pairs
• Vlasov versus N-body: the Hénon sphere
• Triaxiality, principal axis orientation and non-thermal pressure in Abell 383
• Slow evolution of elliptical galaxies induced by dynamical friction III. Role of density concentration and pressure anisotropy
• X-ray and strong lensing mass estimate of MS2137.3-2353
• Cosmological gamma ray and neutrino backgrounds due to neutralino dark matter annihilation
• Violent and mild relaxation of an isolated self-gravitating uniform and spherical cloud of particles
• The haloes of merger remnants
• The Three Hundred project: Galaxy groups do not survive cluster infall
• The cusp-core problem in gas-poor dwarf spheroidal galaxies
• Halo orbits in cosmological disk galaxies: tracers of formation history
• A theorem on central velocity dispersions
• GHASP: an H$\alpha$ kinematical survey of spiral galaxies - XI. Distribution of luminous and dark matter in spiral and irregular nearby galaxies using WISE photometry
• Scaling Evolution of Universal Dark-Matter Halo Density Profiles
• Smooth Particle Lensing
• Are dwarf spheroidal galaxies dark matter dominated or remnants of disrupted larger satellite galaxies? -- A possible test
• What it takes to measure a fundamental difference between dark matter and baryons: the halo velocity anisotropy
• Nonlinear resonant oscillation of gravitational potential induced by ultralight axion in $f(R)$ gravity
• Dark Matter: The evidence from astronomy, astrophysics and cosmology
• A Parallel Tree-SPH code for Galaxy Formation
• Cuspy and fractured black hole shadows in a toy model with axisymmetry
• The descendents of Lyman Break Galaxies in galaxy clusters: spatial distribution and orbital properties
• Dark Matter and IMF normalization in Virgo dwarf early-type galaxies
• Gravitational Lensing by Cold Dark Matter Catastrophes
• The real and apparent convergence of N-body simulations of the dark matter structures: is the Navarro-Frenk-White profile real?
• Dark matter caustics and the enhancement of self-annihilation flux
• Triaxial vs. Spherical Dark Matter Halo Profiles
• Pre- and post-processing of cluster galaxies out to $5\times R_{200}$: The extreme case of A2670
• Matrix method for perturbed black hole metric with discontinuity
• The stellar mass to light ratio in the isolated spiral NGC 4414
• MS 2053.7-0449: Confirmation of a bimodal mass distribution from strong gravitational lensing
• The structure of Andromeda II dwarf spheroidal galaxy
• The distribution of two-dimensional eccentricity of Sunyaev-Zeldovich Effect and X-ray surface brightness profiles
• Cosmological Simulations of Massive Compact High-z Galaxies
• The dynamical structure of dark matter halos with universal properties
• High-order matrix method with delimited expansion domain
• A detailed statistical analysis of the mass profiles of galaxy clusters
• On the universality of the global slope -- anisotropy inequality
• An attractor for dark matter structures
• Slow evolution of elliptical galaxies induced by dynamical friction
• Coarse Graining the Distribution Function of Cold Dark Matter
• Puzzling Outer-Density Profile of the Dark Matter Halo in the Andromeda Galaxy
• Optimal Softening for N-Body Halo Simulations
• The mass distribution of a moderate redshift galaxy group and brightest group galaxy from gravitational lensing and kinematics
• Density Profiles of Collisionless Equilibria. II. Anisotropic Spherical Systems
• Pressure from dark matter annihilation and the rotation curve of spiral galaxies
• BDM Dark Matter: CDM with a core profile and a free streaming scale
• The potential-energy tensors for subsystems. IV. Homeoidally striated density profiles with a central cusp
• Internal Cluster Structure
• High-Resolution Simulations of Cluster Formation
• Simple Models for the Distribution of Dark Matter
• Mass models of gas-rich void dwarf galaxies
• Radial structure, inflow & central mass of stationary radiative galaxy clusters
• Cluster Mass Estimate and a Cusp of the Mass Density Distribution in Clusters of Galaxies
• A Model for the Density Distribution of Virialized CDM Halos
• Numerical Simulations of Galaxy Formation
• Fast and Accurate Fourier Series Solutions to Gravitational Lensing by A General Family of Two Power-Law Mass Distributions
• Time Delay of Light in the Gravitational lensing of Supermassive Black Holes in Dark Matter Halos
• A solution to the problems of cusps and rotation curves in dark matter halos in the cosmological standard model
• Dynamical limits on galactic winds, halo machos and intergalactic globular clusters
• $J$-factors for Velocity-dependent Dark Matter
• The Galaxy Luminosity Functions down to M~-10 in the Hydra I Cluster
• Power-laws and Non-Power-laws in Dark Matter Halos
• Self-Interacting Dark Matter and the Delay of Super-Massive Black Hole Growth
• GHASP: an H$\alpha$ kinematics survey of spiral galaxies - XII. Distribution of luminous and dark matter in spiral and irregular nearby galaxies using R${}_c$-band photometry
• Diagnostics of Baryonic Cooling in Lensing Galaxies
• An Alternative Channel For High-Mass Binary Black Holes-----Dark Matter Accretion Onto Black Hole
• Dynamical response to supernova-induced gas removal in two-component spherical galaxies
• The parallelism between galaxy clusters and early-type galaxies: I. The light and mass profiles
• A Universal Profile of the Dark Matter Halo and the Two-point Correlation Function
• The Galactic positron flux and dark matter substructures
• Lensing in the Hercules Supercluster
• On the Sunyaev-Zel'dovich effect from dark matter annihilation or decay in galaxy clusters
• Density Profile Asymptotes at the Centre of Dark Matter Halos
• The spherical collapse model with shell crossing
• Dark Matter at the Galactic Center
• Distribution of merging and post-merging galaxies in nearby galaxy clusters
• Extended Press-Schechter theory and the density profiles of dark matter haloes
• Light Propagation in Inhomogeneous Universes. III. Distributions of Image Separations
• Chance and Chandra (and repulsive dark matter)
• Collisional interaction limits between dark matters and baryons in `cooling flow' clusters
• Dark matter halo mass functions and density profiles from mass and energy cascade
• Exploiting magnification bias in ultradeep submillimetre-wave surveys using ALMA
• Hydrodynamical Simulations of Galaxy Clusters with Galcons
• The effect of a cusped matter distribution on the formation of brightest cluster members
• Comptonisation of Cosmic Microwave Background Photons in Dwarf Spheroidal Galaxies
• Cooling flows and the entropy of the intragroup medium
• Condensation of Galactic Cold Dark Matter
• Some astrophysical implications of dark matter and gas profiles in a new galaxy clusters model
• An Evolving Entropy Floor in the Intracluster Gas?
• Cosmic shear statistics in cosmologies with non-Gaussian initial conditions
• Catching galaxies in the act of quenching star formation
• Charged black hole surrounded by a galactic halo in de Sitter universe
• Velocity Distributions from Nonextensive Thermodynamics
• Determining all gas properties in galaxy clusters from the dark matter distribution alone
• Gravitational Lensing by Galaxy Groups in the Hubble Deep Field
• Spiral galaxies rotation curves in the Horava - Lifshitz gravity theory
• The Structure of Cold Dark Matter Halos: Recent Insights from High Resolution Simulations
• The diffuse Galactic gamma-rays from dark matter annihilation
• Dark matter annihilation and non-thermal Sunyaev-Zel'dovich effect: I. galaxy cluster
• Diffuse $\gamma$-rays and $\bar{p}$ flux from dark matter annihilation -- a model for consistent results with EGRET and cosmic ray data
• The Distribution of Dark Matter in Galaxies: Constant-Density Dark Halos Envelop the Stellar Disks
• The differential energy distribution of the universal density profile of dark halo
• MAGIC and the Search for Signatures of Supersymmetric Dark Matter
• Steady-state conduction-driven temperature profile in clusters of galaxies
• Strong lens search in the ESO public Survey KiDS
• Rescuing The Primordial Black Holes all-Dark Matter Hypothesis from The Fast Radio Bursts Tension
• Hydrodynamic Approach to the Evolution of Cosmic Structures II: Study of N-body Simulations at z=0
• SUSY dark matter --A collider Physicist's Perspective--
• Polytropic dark halos of elliptical galaxies
• Self-gravitating Newtonian models of fermions with anisotropy and cutoff energy in their distribution function
• Understanding Galaxy Formation and Evolution
• Dynamical and gravitational lensing properties of a new phenomenological model of elliptical galaxies
• Constraining supersymmetry from the satellite experiments
• Detecting the dark matter annihilation at the ground EAS detectors
• Estimating small angular scale CMB anisotropy with high resolution N-body simulations: weak lensing
• Dark matter in massive galaxies
• X-ray Study of the Dark Matter Distribution in Clusters of Galaxies with Chandra
• Neutralino annihilation gamma-rays from clumps and the LMC
• Flattening of dark matter cusps during mergers: model of M31
• Gravitational Collapse in an Expanding Universe: Scaling Relations for Two-Dimensional Collapse Revisited
• Entropy Production in Collisionless Systems. I. Large Phase-Space Occupation Numbers
• Modeling Pairwise Peculiar Velocity Distribution Function of Dark Matter from Halo Density Profiles
• Constraints on the Dark Matter Annihilations by Neutrinos with Substructure Effects Included
• Constraints on the inner density profile of dark-matter haloes from weak gravitational lensing
• A derivation of (half) the dark matter distribution function
• Low surface brightness galaxies mass profiles as a consequence of galactic evolution
• Nuclear star clusters as probes of dark matter halos: the case of the Sagittarius Dwarf Spheroidal Galaxy
• Dark Matter Angular Momentum Profile from the Jeans Equation
• Homeoidally striated density profiles: sequences of virial equilibrium configurations with constant anisotropy parameters
• Evolution of Power Spectrum in Non-Gaussian Models
• Collapsed and Extended Cold Dark Matter Haloes in Softened N-Body Gravity
• Effects of Angular Momentum on Halo Profiles
• The evolution of low-mass central galaxies in the vicinity of massive structures and its impact on the two-halo conformity
• Cluster density slopes from Dark Matter-Baryons Energy Transfer
• The connection between halo concentrations and assembly histories: a probe of gravity?
• Theory and Phenomenology of Dirac Leptogenesis
• Distinguishing dark matter halos with Extreme mass ratio inspirals
• Soft X-ray excess of clusters: a thermal filament model, and the strong lensing of background galaxy groups
• Do the Unidentified EGRET Sources Trace Annihilating Dark Matter in the Local Group?
• Linearity: galaxy formation encounters an unanticipated empirical relation
• Constraining Lambda using cluster quadrupoles
• Primordial Black Hole Mergers as Probes of Dark Matter in Galactic Center
• Semi-Analytic Modeling of Dark Matter Subhalo Encounters with Thin Stellar Streams: Statistical Predictions for GD-1-like Streams in CDM
• A numerical fit of analytical to simulated density profiles in dark matter haloes
• Predicting Steady States of One-dimensional Collisionless Gravitating Systems
• Density profiles of dark matter halos with anisotropic velocity tensors
• Gamma Ray and Neutrino Flux from Annihilation of Neutralino Dark Matter at Galactic Halo Region in mAMSB Model
• Resolving the jeans mass in hydrodynamic simulations of hierarchical clustering
• A necessary condition for best fitting analytical to simulated density profiles in dark matter haloes
• Constrained Violent Relaxation to a Spherical Halo
• Precision Astrometry, Galactic Mergers, Halo Substructure and Local Dark Matter
• Cusped Mass Density Profiles and Magnification Ratios of Double Image Gravitational Lenses
• Astrophysical Constraints on Dark Matter
• On the Size Evolution of a Galactic Disk in Hierarchical Merging of Cold Dark Matter Halos
• Resolving the outer density profile of dark matter halo in Andromeda galaxy
• Supplying Dark Energy from Scalar Field Dark Matter
• Non-Thermal Dark Matter, High Energy Cosmic Rays and Late-Decaying Particles From Inflationary Quantum Fluctuations
• Thermodynamics of an universe with Decaying Cold Dark Matter
• Looking for dark matter annihilations in dwarf galaxies
• A new model for spherical galaxies and its distribution functions
• Evolving Ultralight Scalars into Non-Linearity with Lagrangian Perturbation Theory
• Holes within galaxies: the egg or the hen?
• Constraints on dark and visible mass in galaxies from strong gravitational lensing
• Galaxies in the central regions of simulated galaxy clusters
• Formation of Disk Galaxies: On the Angular Momentum Problem, the Tully-Fisher Relation and Magnetohydrodynamics
• Effect of dark matter halos on the orbital and escape dynamics of barred galaxies
• Determination of Dark Matter Properties at High-Energy Colliders
• Dark matter detection in gamma astroparticle experiments
• Probing late-time annihilations of oscillating asymmetric dark matter via rotation curves of galaxies
• Understanding disk galaxy rotation velocities without dark matter contribution--a physical process for MOND?
• The tidal evolution of satellite galaxies in cosmological simulations: insights from COLIBRE
• A dynamics-based density profile for dark haloes. I. Algorithm and basic results