Dark-Matter Decays and Self-Gravitating Halos

Abstract

We consider models in which a dark-matter particle decays to a slightly less massive daughter particle and a noninteracting massless particle. The decay gives the daughter particle a small velocity kick. Self-gravitating dark-matter halos that have a virial velocity smaller than this velocity kick may be disrupted by these particle decays, while those with larger virial velocities will be heated. We use numerical simulations to follow the detailed evolution of the total mass and density profile of self-gravitating systems composed of particles that undergo such velocity kicks as a function of the kick speed (relative to the virial velocity) and the decay time (relative to the dynamical time). We show how these decays will affect the halo mass-concentration relation and mass function. Using measurements of the halo mass-concentration relation and galaxy-cluster mass function to constrain the lifetime--kick-velocity parameter space for decaying dark matter, we find roughly that the observations rule out the combination of kick velocities greater than 100 km/s and decay times less than a few times the age of the Universe.

17 pages, 10 figures, replaced with published version

References in corpus (79)

• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Determination of Cosmological Parameters
• A Universal Density Profile from Hierarchical Clustering
• The Structure of Cold Dark Matter Halos
• Wilkinson Microwave Anisotropy Probe (WMAP) Three Year Results: Implications for Cosmology
• The cosmological simulation code GADGET-2
• Supersymmetric Dark Matter
• Dark Matter Substructure in Galactic Halos
• Profiles of dark haloes: evolution, scatter, and environment
• Statistical Properties of X-ray Clusters: Analytic and Numerical Comparisons
• Observational evidence for self-interacting cold dark matter
• Toward a halo mass function for precision cosmology: the limits of universality
• Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Likelihoods and Parameters from the WMAP data
• GADGET: A code for collisionless and gasdynamical cosmological simulations
• Bounds on Universal Extra Dimensions
• Analytic model for galaxy and dark matter clustering
• At the heart of the matter: the origin of bulgeless dwarf galaxies and Dark Matter cores
• The Inner Structure of LambdaCDM Halos I: A Numerical Convergence Study
• Chandra Cluster Cosmology Project III: Cosmological Parameter Constraints
• An excursion set model of hierarchical clustering: Ellipsoidal collapse and the moving barrier
• Cosmology with the Sunyaev-Zel'dovich Effect
• High-Resolution Rotation Curves and Galaxy Mass Models from THINGS
• Dark matter halo concentrations in the Wilkinson Microwave Anisotropy Probe year 5 cosmology
• Theoretical Models of the Halo Occupation Distribution: Separating Central and Satellite Galaxies
• The Luminosity and Color Dependence of the Galaxy Correlation Function
• Inelastic Dark Matter
• The statistics of LCDM Halo Concentrations
• Concentration, Spin and Shape of Dark Matter Haloes as a Function of the Cosmological Model: WMAP1, WMAP3 and WMAP5 results
• First-year Sloan Digital Sky Survey-II (SDSS-II) Supernova Results: Hubble Diagram and Cosmological Parameters
• A Universal Mass Profile for Dwarf Spheroidal Galaxies?
• Kaluza-Klein Dark Matter
• The Sloan Lens ACS Survey. III - The Structure and Formation of Early-type Galaxies and their Evolution since z~1
• Concentration, Spin and Shape of Dark Matter Haloes: Scatter and the Dependence on Mass and Environment
• A common mass scale for satellite galaxies of the Milky Way
• Accurate universal models for the mass accretion histories and concentrations of dark matter halos
• The Observed properties of Dark Matter on small spatial scales
• Cosmological Constraints from the SDSS maxBCG Cluster Catalog
• Updated Bounds on Milli-Charged Particles
• Hidden Charged Dark Matter
• Dark Matter and Dark Radiation
• Hundreds of Milky Way Satellites? Luminosity Bias in the Satellite Luminosity Function
• Effects of Baryons and Dissipation on the Matter Power Spectrum
• The Present and Future Mass of the Milky Way Halo
• High-Resolution Measurements of the Halos of Four Dark Matter-Dominated Galaxies: Deviations from a Universal Density Profile
• Mass Models for Low Surface Brightness Galaxies with High Resolution Optical Velocity Fields
• Phenomenology of the Littlest Higgs with T-Parity
• Galaxy clusters discovered with a Sunyaev-Zel'dovich effect survey
• Dark-Matter Electric and Magnetic Dipole Moments
• Density profiles of galaxy groups and clusters from SDSS galaxy-galaxy weak lensing
• Generating Equilibrium Dark Matter Halos: Inadequacies of the Local Maxwellian Approximation
• A Chandra View of Dark Matter in Early-Type Galaxies
• Halo mass - concentration relation from weak lensing
• Elastic Scattering and Direct Detection of Kaluza-Klein Dark Matter
• Erasing Dark Matter Cusps in Cosmological Galactic Halos with Baryons
• Characterizing the Cluster Lens Population
• Probing the Dark Matter and Gas Fraction in Relaxed Galaxy Groups with X-ray observations from Chandra and XMM
• New constraints on dark energy from the observed growth of the most X-ray luminous galaxy clusters
• The Observed Concentration-Mass Relation for Galaxy Clusters
• The X-Ray Concentration-Virial Mass Relation
• The Most Dark Matter Dominated Galaxies: Predicted Gamma-ray Signals from the Faintest Milky Way Dwarfs
• The X-ray Cluster Normalization of the Matter Power Spectrum
• Tidal Tails Test the Equivalence Principle in the Dark Sector
• The Distribution of Dark Matter Over 3 Decades in Radius in the Lensing Cluster Abell 611
• On the origin of cold dark matter halo density profiles
• Breaking the Degeneracies Between Cosmology and Galaxy Bias
• Collapse Barriers and Halo Abundance: Testing the Excursion Set Ansatz
• Decaying Cold Dark Matter Model and Small-Scale Power
• Cosmology and the Halo Occupation Distribution from Small-Scale Galaxy Clustering in the Sloan Digital Sky Survey
• Galilean Equivalence for Galactic Dark Matter
• Determining the Nature of Dark Matter with Astrometry
• Structure formation in a string-inspired modification of the cold dark matter model
• WMAP Constraints on Decaying Cold Dark Matter
• Do Distinct Cosmological Models Predict Degenerate Halo Populations?
• Mass Distributions of HST Galaxy Clusters from Gravitational Arcs
• The joint evolution of baryons and dark matter haloes
• Mapping the allowed parameter space for decaying dark matter models
• Unstable Cold Dark Matter and the Cuspy Halo Problem in Dwarf Galaxies
• Galaxy density profiles and shapes -- II. selection biases in strong lensing surveys
• Decaying Cold Dark Matter and the Evolution of the Cluster Abundance
• Decaying Dark Matter and the Deficit of Dwarf Haloes

Cited by in corpus (52)

• Cold dark matter: controversies on small scales
• Review of asymmetric dark matter
• Milky Way Satellite Census. III. Constraints on Dark Matter Properties from Observations of Milky Way Satellite Galaxies
• Cold dark matter heats up
• The Density Profiles of Massive, Relaxed Galaxy Clusters. II. Separating Luminous and Dark Matter in Cluster Cores
• General Constraints on Dark Matter Decay from the Cosmic Microwave Background
• Gravitational probes of dark matter physics
• Energy Injection And Absorption In The Cosmic Dark Ages
• Constraints on Bosonic Dark Matter From Observations of Old Neutron Stars
• Decaying dark matter and the tension in ${\sigma }_8$
• Bounds on self-interacting fermion dark matter from observations of old neutron stars
• Self-Scattering for Dark Matter with an Excited State
• Cosmological Simulations of Decaying Dark Matter: Implications for Small-scale Structure of Dark Matter Halos
• Dynamical Dark Matter from Strongly-Coupled Dark Sectors
• Linear cosmological constraints on 2-body decaying dark matter scenarios and the $S_8$ tension
• Super heavy thermal dark matter
• Self-interacting inelastic dark matter: A viable solution to the small scale structure problems
• Lyman-alpha Forest Constraints on Decaying Dark Matter
• Aspects of the Dark Dimension in Cosmology
• Updated constraints on decaying cold dark matter
• Dark-matter decays and Milky Way satellite galaxies
• Effects of Unstable Dark Matter on Large-Scale Structure and Constraints from Future Surveys
• CLASH-VLT: a full dynamical reconstruction of the mass profile of Abell S1063 from 1 kpc out to the virial radius
• The inner dark matter distribution of the Cosmic Horseshoe (J1148+1930) with gravitational lensing and dynamics
• Lifetime Constraints for Late Dark Matter Decay
• Evolution of perturbations and cosmological constraints in decaying dark matter models with arbitrary decay mass products
• Quintessence Axion Dark Energy and a Solution to the Hubble Tension
• Cosmological Structure Formation in Decaying Dark Matter Models
• Constraints on decaying dark matter from weak lensing and cluster counts
• Formulation and constraints on decaying dark matter with finite mass daughter particles
• The GOGREEN survey: the internal dynamics of clusters of galaxies at redshift 0.9-1.4
• Constraining interacting dark energy models with the halo concentration-mass relation
• A Model For Late Dark Matter Decay
• Weak Gravitational Lensing as a Method to Constrain Unstable Dark Matter
• The cusp-core problem in gas-poor dwarf spheroidal galaxies
• Small scale clustering of late forming dark matter
• Core formation from self-heating dark matter
• CLASH-VLT: The inner slope of the MACS J1206.2-0847 dark matter density profile
• Probing the two-body decaying dark matter scenario with weak lensing and the cosmic microwave background
• Two Micron-Size Dark Dimensions
• Mass assembly history and infall time of the Fornax dwarf spheroidal galaxy
• Decaying axinolike dark matter: Discriminative solution to small-scale issues
• Imprints of decaying dark matter on cosmic voids
• Angular Momentum Evolution in Dark Matter Halos
• Baryonic and Leptonic GeV Dark Matter
• Hitchhiker's Guide to the Swampland: The Cosmologist's Handbook to the string-theoretical Swampland Programme
• Distinguishing thermal histories of dark matter from structure formation
• Semianalytic model for decaying dark matter halos
• Metamorphosis of dwarf halo density profile under dark matter decays
• Constraining decaying dark matter with BOSS data and the effective field theory of large-scale structures
• Decaying Dark Matter: Simulations and Weak-Lensing Forecast
• Milky Way Satellite Census. IV. Constraints on Decaying Dark Matter from Observations of Milky Way Satellite Galaxies