The COpernicus COmplexio: Statistical Properties of Warm Dark Matter Haloes

Abstract

The recent detection of a 3.5 keV X-ray line from the centres of galaxies and clusters by Bulbul et al. (2014a) and Boyarsky et al. (2014a) has been interpreted as emission from the decay of 7 keV sterile neutrinos which could make up the (warm) dark matter (WDM). As part of the COpernicus COmplexio (COCO) programme, we investigate the properties of dark matter haloes formed in a high-resolution cosmological $N$-body simulation from initial conditions similar to those expected in a universe in which the dark matter consists of 7 keV sterile neutrinos. This simulation and its cold dark matter (CDM) counterpart have $\sim 13.4$bn particles, each of mass $\sim 10^5{h}^{-1}{M}_{\odot }$, providing detailed information about halo structure and evolution down to dwarf galaxy mass scales. Non-linear structure formation on small scales ($M_{200}\le 2\times 10^9{h}^{-1}{M}_{\odot }$) begins slightly later in COCO-Warm than in COCO-Cold. The halo mass function at the present day in the WDM model begins to drop below its CDM counterpart at a mass $\sim 2\times 10^9{h}^{-1}{M}_{\odot }$ and declines very rapidly towards lower masses so that there are five times fewer haloes of mass $M_{200}=10^8{h}^{-1}{M}_{\odot }$ in COCO-Warm than in COCO-Cold. Halo concentrations on dwarf galaxy scales are correspondingly smaller in COCO-Warm, and we provide a simple functional form that describes its evolution with redshift. The shapes of haloes are similar in the two cases, but the smallest haloes in COCO-Warm rotate slightly more slowly than their CDM counterparts.

16 pages, 14 figures, replaced a typo in Table 1

References in corpus (18)

• The redshift dependence of the structure of massive LCDM halos
• The spin and shape of dark matter haloes in the Millennium simulation of a LambdaCDM universe
• Dark matter and cosmic structure
• Baryon effects on the internal structure of LCDM halos in the EAGLE simulations
• The halo mass function from the dark ages through the present day
• Discreteness effects in simulations of Hot/Warm dark matter
• Bent by baryons: the low mass galaxy-halo relation
• Sterile neutrino dark matter as a consequence of nuMSM-induced lepton asymmetry
• The abundance of (not just) dark matter haloes
• Discovery of a 3.5 keV line in the Galactic Center and a Critical Look at the Origin of the Line Across Astronomical Targets
• Resonantly-Produced 7 keV Sterile Neutrino Dark Matter Models and the Properties of Milky Way Satellites
• The Copernicus Complexio: a high-resolution view of the small-scale Universe
• On the Structure of Dark Matter Halos at the Damping Scale of the Power Spectrum with and without Relict Velocities
• The inner structure of haloes in Cold+Warm dark matter models
• The phase space density of fermionic dark matter haloes
• 3.55 keV photon lines from axion to photon conversion in the Milky Way and M31
• The contributions of matter inside and outside of haloes to the matter power spectrum
• Comment on "Dark matter searches going bananas: the contribution of Potassium (and Chlorine) to the 3.5 keV line"

Cited by in corpus (111)

• Sterile Neutrino Dark Matter
• Not so lumpy after all: modeling the depletion of dark matter subhalos by Milky Way-like galaxies
• The Mass-Concentration-Redshift Relation of Cold and Warm Dark Matter Halos
• The CosmoVerse White Paper: Addressing observational tensions in cosmology with systematics and fundamental physics
• Warm dark matter chills out: constraints on the halo mass function and the free-streaming length of dark matter with 8 quadruple-image strong gravitational lenses
• A redshift-independent efficiency model: star formation and stellar masses in dark matter halos at z>4
• There is No Missing Satellites Problem
• The upper bound on the lowest mass halo
• Overview of the DESI Milky Way Survey
• The Extraordinary Amount of Substructure in the Hubble Frontier Fields Cluster Abell 2744
• The Universe at z>10: Predictions for JWST from the UniverseMachine DR1
• Phat ELVIS: The inevitable effect of the Milky Way's disk on its dark matter subhaloes
• Probing dark matter structure down to $10^7$ solar masses: flux ratio statistics in gravitational lenses with line of sight halos
• Shaken and Stirred: The Milky Way's Dark Substructures
• Quantifying the impact of the Large Magellanic Cloud on the structure of the Milky Way's dark matter halo using Basis Function Expansions
• Joint constraints on thermal relic dark matter from strong gravitational lensing, the Lyman-$\alpha$ forest, and Milky Way satellites
• Dark Matter Constraints from a Unified Analysis of Strong Gravitational Lenses and Milky Way Satellite Galaxies
• Novel cosmic-ray electron and positron constraints on MeV dark matter particles
• Sterile neutrino dark matter: A tale of weak interactions in the strong coupling epoch
• The Copernicus Complexio: a high-resolution view of the small-scale Universe
• Constraints on the properties of warm dark matter using the satellite galaxies of the Milky Way
• No cores in dark matter-dominated dwarf galaxies with bursty star formation histories
• Constraints on the identity of the dark matter from strong gravitational lenses
• Substructure and galaxy formation in the Copernicus Complexio warm dark matter simulations
• Determining the full satellite population of a Milky Way-mass halo in a highly resolved cosmological hydrodynamic simulation
• The BOSS Emission-Line Lens Survey. III. : Strong Lensing of Ly$\alpha$ Emitters by Individual Galaxies
• Projection effects in the strong lensing study of subhaloes
• Probing the nature of dark matter particles with stellar streams
• Probing the nature of dark matter by forward modeling flux ratios in strong gravitational lenses
• Warm Dark Matter Constraints Using Milky-Way Satellite Observations and Subhalo Evolution Modeling
• The imprint of cosmic reionisation on the luminosity function of galaxies
• Resonant Sterile Neutrino Dark Matter in the Local and High-z Universe
• Hints against the cold and collisionless nature of dark matter from the galaxy velocity function
• Addressing the too big to fail problem with baryon physics and sterile neutrino dark matter
• Properties of Local Group galaxies in hydrodynamical simulations of sterile neutrino dark matter cosmologies
• A fresh look into the interacting dark matter scenario
• Quantum fluctuations masquerade as halos: Bounds on ultra-light dark matter from quadruply-imaged quasars
• Caught in the cosmic web: Environmental effect on halo concentrations, shape, and spin
• Strong lensing signatures of luminous structure and substructure in early-type galaxies
• The little things matter: relating the abundance of ultrafaint satellites to the hosts' assembly history
• Warm FIRE: Simulating Galaxy Formation with Resonant Sterile Neutrino Dark Matter
• Robust cosmic-ray constraints on $p$-wave annihilating MeV dark matter
• Deadly dark matter cusps vs faint and extended star clusters: Eridanus II and Andromeda XXV
• Constraints on warm dark matter from UV luminosity functions of high-z galaxies with Bayesian model comparison
• Measuring subhalo mass in redMaPPer clusters with CFHT Stripe 82 Survey
• Towards a general parametrization of the warm dark matter halo mass function
• Forecasts for Galaxy Formation and Dark Matter Constraints from Dwarf Galaxy Surveys
• Reionisation in sterile neutrino cosmologies
• ETHOS - an Effective Theory of Structure Formation: detecting dark matter interactions through the Lyman-$\alpha$ forest
• A new smooth-$k$ space filter approach to calculate halo abundances
• Extracting the Subhalo Mass Function from Strong Lens Images with Image Segmentation
• The spatial distribution of Milky Way satellites, gaps in streams and the nature of dark matter
• The role of the eROSITA all-sky survey in searches for sterile neutrino dark matter
• The galaxy population in cold and warm dark matter cosmologies
• Structure Formation and the Global 21-cm Signal in the Presence of Coulomb-like Dark Matter-Baryon Interactions
• On the Cosmic Web Elongation in Fuzzy Dark Matter Cosmologies: Effects on Density Profiles, Shapes and Alignments of Halos
• The halo mass function and inner structure of ETHOS haloes at high redshift
• Fluctuations of the gravitational field generated by a random population of extended substructures
• Exploring extensions to the standard cosmological model and the impact of baryons on small scales
• Ultra-light axions and the kinetic Sunyaev-Zel'dovich Effect
• Introducing the AIDA-TNG project: galaxy formation in alternative dark matter models
• The Effect of Thermal Velocities on Structure Formation in N-body Simulations of Warm Dark Matter
• ETHOS - an effective theory of structure formation: formation of the first haloes and their stars
• Local Group star formation in warm and self-interacting dark matter cosmologies
• The abundance of dark matter haloes down to Earth mass
• Detecting the Figure Rotation of Dark Matter Halos with Tidal Streams
• Evolution of subhalo orbits in a smoothly-growing host halo potential
• Influence of ~7 keV sterile neutrino dark matter on the process of reionization
• Discriminating power of milli-lensing observations for dark matter models
• COZMIC. I. Cosmological Zoom-in Simulations with Initial Conditions Beyond Cold Dark Matter
• The impact of baryons on the internal structure of dark matter haloes from dwarf galaxies to superclusters in the redshift range 0<z<7
• An Accurate Comprehensive Approach to Substructure: I. Accreted Subhaloes
• Degeneracies between baryons and dark matter: the challenge of constraining the nature of dark matter with JWST
• Resolution of the apparent discrepancy between the number of massive subhaloes in Abell 2744 and ΛCDM
• Non-sphericity of ultralight axion dark matter haloes in the Galactic dwarf spheroidal galaxies
• Matching the mass function of Milky Way satellites in competing dark matter models
• Massive prompt cusps: A new signature of warm dark matter
• The signal of decaying dark matter with hydrodynamical simulations
• Nonlinear growth of structure in cosmologies with damped matter fluctuations
• Gravitational-wave event rates as a new probe for dark matter microphysics
• An Accurate Comprehensive Approach to Substructure: III. Masses and Formation Times of the Host Haloes
• An Accurate Comprehensive Approach to Substructure: II. Stripped Subhaloes
• Pushing the Limits of Detectability: Mixed Dark Matter from Strong Gravitational Lenses
• Non-Halo Structures and their Effects on Gravitational Lensing
• Dating the tidal disruption of globular clusters with Gaia data on their stellar streams
• ARTEMIS emulator: exploring the effect of cosmology and galaxy formation physics on Milky Way-mass haloes and their satellites
• Challenges in Cosmology from the Big Bang to Dark Energy, Dark Matter and Galaxy Formation
• Fluorescent rings in star-free dark matter haloes
• Differentiating small-scale subhalo distributions in CDM and WDM models using persistent homology
• Anticipating the XRISM search for the decay of resonantly produced sterile neutrino dark matter
• Anisotropic strong lensing as a probe of dark matter self-interactions
• Trial by FIRE: Probing the dark matter density profile of dwarf galaxies with GraphNPE
• Globular clusters vs dark matter haloes in strong lensing observations
• N-body simulations of structure formation in thermal inflation cosmologies
• Warm dark matter model with a few keV mass is bad for the too-big-to-fail problem
• A forward-modelling method to infer the dark matter particle mass from strong gravitational lenses
• Improved Halo Model Calibrations for Mixed Dark Matter Models of Ultralight Axions
• Caught in the cosmic web: environmental effects on subhalo abundance and internal density profiles
• The connection between halo concentrations and assembly histories: a probe of gravity?
• The cusp-halo relation
• The Milky Way's total satellite population and constraining the mass of the warm dark matter particle
• The AIDA-TNG project: dark matter profiles and concentrations in alternative dark matter models
• Halo concentration strengthens dark matter constraints in galaxy-galaxy strong lensing analyses
• The progenitor galaxies of stellar haloes as "failed" Milky Ways
• Galaxy-galaxy strong lens perturbations: line-of-sight haloes versus lens subhaloes
• An Accurate Comprehensive Approach to Substructure: IV. Dynamical Friction
• Forward-modelling the Luminosity, Distance, and Size distributions of the Milky Way Satellites
• Dwarf stellar haloes: a powerful probe of small-scale galaxy formation and the nature of dark matter
• Milky Way Satellite Census. IV. Constraints on Decaying Dark Matter from Observations of Milky Way Satellite Galaxies
• Detecting dark matter substructure with lensed quasars in optical bands
• Tidal adaptive softening and artificial fragmentation in cosmological simulations