Equilibrium axisymmetric halo model for the Milky Way and its implications for direct and indirect DM searches

Abstract

We for the first time provide self-consistent axisymmetric phase-space distribution models for the Milky Way's dark matter (DM) halo which are carefully matched against the latest kinematic measurements through Bayesian analysis. By using broad priors on the individual galactic components, we derive conservative estimates for the astrophysical factors entering the interpretation of direct and indirect DM searches. While the resulting DM density profiles are in good agreement with previous studies, implying ${\rho }_{\odot }\approx 10^{-2}{M}_{\odot }/{\mathrm{pc}}^3$, the presence of baryonic disc leads to significant differences in the local DM velocity distribution in comparison with the standard halo model. For direct detection, this implies roughly 30% stronger cross-section limits at DM masses near detectors maximum sensitivity and up to an order of magnitude weaker limits at the lower end of the mass range. Furthermore, by performing Monte-Carlo simulations for the upcoming DARWIN and DarkSide-20k experiments, we demonstrate that upon successful detection of heavy DM with coupling just below the current limits, the carefully constructed axisymmetric models can eliminate bias and reduce uncertainties by more then 50% in the reconstructed DM coupling and mass, but also help in a more reliable determination of the scattering operator. Furthermore, the velocity anisotropies induced by the baryonic disc can lead to significantly larger annual modulation amplitude and sizable differences in the directional distribution of the expected DM-induced events. For indirect searches, we provide the differential $J$-factors and compute several moments of the relative velocity distribution that are needed for predicting the rate of velocity-dependent annihilations. However, we find that accurate predictions are still hindered by large uncertainties regarding the DM distribution near the galactic center.

arXiv commentArticle consists of 44 pages, 15 figures. We additionally provide the tabulated values of astrophysical factors (in total 18 files) obtained in this work

References in corpus (167)

• emcee: The MCMC Hammer
• A Universal Density Profile from Hierarchical Clustering
• Gaia Data Release 2. Summary of the contents and survey properties
• The Gaia mission
• Local Kinematics and the Local Standard of Rest
• Dark Matter Search Results from a One Tonne$\times$Year Exposure of XENON1T
• The Apache Point Observatory Galactic Evolution Experiment (APOGEE)
• The Galaxy in Context: Structural, Kinematic and Integrated Properties
• Results from a search for dark matter in the complete LUX exposure
• The Structure of Dark Matter Haloes in Dwarf Galaxies
• A History of Dark Matter
• The merger that led to the formation of the Milky Way's inner stellar halo and thick disk
• Secluded WIMP Dark Matter
• Searching for Dark Matter Annihilation from Milky Way Dwarf Spheroidal Galaxies with Six Years of Fermi-LAT Data
• The mass distribution and gravitational potential of the Milky Way
• Detection of the gravitational redshift in the orbit of the star S2 near the Galactic centre massive black hole
• A universal angular momentum profile for galactic halos
• First Dark Matter Search Results from the XENON1T Experiment
• A geometric distance measurement to the Galactic Center black hole with 0.3% uncertainty
• Mass models of the Milky Way
• Dark matter annihilation at the galactic center
• The Milky Way's Circular Velocity Curve to 60 kpc and an Estimate of the Dark Matter Halo Mass from Kinematics of ~2400 SDSS Blue Horizontal Branch Stars
• Implication of neutrino backgrounds on the reach of next generation dark matter direct detection experiments
• Gaia Data Release 2: Kinematics of globular clusters and dwarf galaxies around the Milky Way
• Chemical Cartography with APOGEE: Metallicity Distribution Functions and the Chemical Structure of the Milky Way Disk
• DarkSide-20k: A 20 Tonne Two-Phase LAr TPC for Direct Dark Matter Detection at LNGS
• The Effective Field Theory of Dark Matter Direct Detection
• Beyond Collisionless Dark Matter: Particle Physics Dynamics for Dark Matter Halo Structure
• A dynamically young and perturbed Milky Way disk
• A novel determination of the local dark matter density
• Direct Detection of WIMP Dark Matter: Concepts and Status
• Dark Matter Constraints from Observations of 25 Milky Way Satellite Galaxies with the Fermi Large Area Telescope
• A direct dynamical measurement of the Milky Way's disk surface density profile, disk scale length, and dark matter profile at 4 kpc < R < 9 kpc
• The Local Dark Matter Density
• The spatial structure of mono-abundance sub-populations of the Milky Way disk
• Low-Mass Dark Matter Search with the DarkSide-50 Experiment
• Vertical waves in the solar neighbourhood in Gaia DR2
• The dark matter density at the Sun's location
• The Circular Velocity Curve of the Milky Way from $5$ to $25$ kpc
• DARWIN: towards the ultimate dark matter detector
• The Impact of Baryonic Physics on the Structure of Dark Matter Halos: the View from the FIRE Cosmological Simulations
• Mass models of the Milky Way
• The Dark Matter Halo of the Milky Way, AD 2013
• Annual Modulation of Dark Matter: A Review
• The Milky Way total mass profile as inferred from Gaia DR2
• On the local dark matter density
• A Dark-Matter Spike at the Galactic Center?
• Model-independent WIMP Scattering Responses and Event Rates: A Mathematica Package for Experimental Analysis
• The RAVE survey: the Galactic escape speed and the mass of the Milky Way
• Proper motions and dynamics of the Milky Way globular cluster system from Gaia DR2
• Stars, Gas, and Dark Matter in the Solar Neighborhood
• Spiral arms, bar shape and bulge microlensing in the Milky Way
• Current status of direct dark matter detection experiments
• "Skinny Milky Way, Please", says Sagittarius
• Determination of the Local Dark Matter Density in our Galaxy
• Low-Mass Dark Matter Search with CDMSlite
• The GALAH survey and Gaia DR2: dissecting the stellar disc's phase space by age, action, chemistry and location
• A review of the discovery reach of directional Dark Matter detection
• The stellar population structure of the Galactic disk
• Galactic Angular Momentum in the Illustris Simulation: Feedback and the Hubble Sequence
• Mass and shape of the Milky Way's dark matter halo with globular clusters from Gaia and Hubble
• On the Shoulders of Giants: Properties of the Stellar Halo and the Milky Way Mass Distribution
• The Sausage Globular Clusters
• The Milky Way's rotation curve out to 100 kpc and its constraint on the Galactic mass distribution
• Dark Matter Spikes and Annihilation Radiation from the Galactic Center
• Dark Matter Profile in the Galactic Center
• Evidence for dark matter in the inner Milky Way
• Neutrino Coherent Scattering Rates at Direct Dark Matter Detectors
• Rotation Curve and Mass Distribution in the Galactic Center --- From Black Hole to Entire Galaxy ---
• Made-to-Measure models of the Galactic Box/Peanut bulge: stellar and total mass in the bulge region
• The shape of the inner Milky Way halo from observations of the Pal 5 and GD-1 stellar streams
• Neutrino Backgrounds to Dark Matter Searches
• The Sommerfeld enhancement for dark matter with an excited state
• The mass of the Milky Way from satellite dynamics
• Evidence for an Intermediate-Mass Milky Way from Gaia DR2 Halo Globular Cluster Motions
• Sommerfeld enhancement: general results from field theory diagrams
• Rotation curve of the Milky Way from Classical Cepheids
• Search for $\gamma$-ray line signals from dark matter annihilations in the inner Galactic halo from ten years of observations with H.E.S.S
• On the estimation of the Local Dark Matter Density using the rotation curve of the Milky Way
• Singlet fermionic dark matter
• The impact of baryons on the spins and shapes of dark matter haloes
• The Effects of the Sagittarius Dwarf Tidal Stream on Dark Matter Detectors
• Broken degeneracies: the rotation curve and velocity anisotropy of the Milky Way halo
• The mass of our Milky Way
• Global analyses of Higgs portal singlet dark matter models using GAMBIT
• Constraining the Milky Way Halo Potential with the GD-1 stellar stream
• The minimal model of fermionic dark matter
• The escape speed curve of the Galaxy obtained from Gaia DR2 implies a heavy Milky Way
• Baryon-induced dark matter cores in the EAGLE simulations
• The echo of the bar buckling: phase-space spirals in Gaia DR2
• Dark Matter Constraints from a Joint Analysis of Dwarf Spheroidal Galaxy Observations with VERITAS
• The local high velocity tail and the Galactic escape speed
• Angular momentum properties of haloes and their baryon content in the Illustris simulation
• The Milky Way Halo in Action Space
• The link between the assembly of the inner dark matter halo and the angular momentum evolution of galaxies in the EAGLE simulation
• Inferred Evidence For Dark Matter Kinematic Substructure with SDSS-Gaia
• The Gravitational Force Field of the Galaxy Measured From the Kinematics of RR Lyrae in Gaia
• Dark Moments and the DAMA-CoGeNT Puzzle
• Recoil momentum spectrum in directional dark matter detectors
• The local dark matter phase-space density and impact on WIMP direct detection
• A Global Analysis of Dark Matter Signals from 27 Dwarf Spheroidal Galaxies using 11 Years of Fermi-LAT Observations
• Using Gaia DR2 to Constrain Local Dark Matter Density and Thin Dark Disk
• Chiral Effective Theory of Dark Matter Direct Detection
• The Local Dark Matter Density from SDSS-SEGUE G-dwarfs
• Annihilation Radiation from a Dark Matter Spike at the Galactic Centre
• DarkBit: A GAMBIT module for computing dark matter observables and likelihoods
• Astrophysical uncertainties on the local dark matter distribution and direct detection experiments
• Directional Dark Matter Detection Beyond the Neutrino Bound
• Indirect dark matter searches in Gamma- and Cosmic Rays
• The cumulative mass profile of the Milky Way as determined by globular cluster kinematics from Gaia DR2
• Axisymmetric galaxy models wth central BHs, with an application to M32
• A General Analysis of Direct Dark Matter Detection: From Microphysics to Observational Signatures
• Strong constraints on thermal relic dark matter from Fermi-LAT observations of the Galactic Center
• Rotation and Mass in the Milky Way and Spiral Galaxies
• On the Run: mapping the escape speed across the Galaxy with SDSS
• A Dark Matter Hurricane: Measuring the S1 Stream with Dark Matter Detectors
• MOA-II Galactic Microlensing Constraints: The Inner Milky Way has a Low Dark Matter Fraction and a Near Maximal Disk
• Direct detection of Light Anapole and Magnetic Dipole DM
• A Milky Way with a massive, centrally concentrated thick disc: new Galactic mass models for orbit computations
• Thermal Relic Abundances of Particles with Velocity-Dependent Interactions
• Dark matter annihilation near a black hole: plateau vs. weak cusp
• Anisotropic dark matter distribution functions and impact on WIMP direct detection
• The Rotation Curve, Mass Distribution and Dark Matter Content of the Milky Way from Classical Cepheids
• The mass of our Galaxy from satellite proper motions in the Gaia era
• Annual Modulation in Direct Dark Matter Searches
• Determining the WIMP mass from a single direct detection experiment, a more detailed study
• Anatomy of Eddington-like inversion methods in the context of dark matter searches
• Can we overcome the neutrino floor at high masses?
• Can Solar Neutrinos be a Serious Background in Direct Dark Matter Searches?
• A robust estimate of the Milky Way mass from rotation curve data
• The distribution of nearby stars in phase space mapped by Hipparcos: I. The potential well and local dynamical mass
• CYGNUS: Feasibility of a nuclear recoil observatory with directional sensitivity to dark matter and neutrinos
• Fundamental statistical limitations of future dark matter direct detection experiments
• First Gaia dynamical model of the Milky Way disc with six phase space coordinates: a test for galaxy dynamics
• Identifying the Theory of Dark Matter with Direct Detection
• Constraining Milky Way mass with Hypervelocity Stars
• A self-consistent phase-space distribution function for the anisotropic Dark Matter halo of the Milky Way
• A Search for Dark Matter Annihilation in the Milky Way Halo
• How well will ton-scale dark matter direct detection experiments constrain minimal supersymmetry?
• Joint constraints on the Galactic dark matter halo and Galactic Centre from hypervelocity stars
• Dark matter directional detection in non-relativistic effective theories
• Robust cosmic-ray constraints on $p$-wave annihilating MeV dark matter
• On velocity-dependent dark matter annihilations in dwarf satellites
• Measuring the local matter density using Gaia DR2
• Search for gamma-ray emission from $p$-wave dark matter annihilation in the Galactic Center
• Model-independent constraints on dark matter annihilation in dwarf spheroidal galaxies
• New directional signatures from the non-relativistic effective field theory of dark matter
• Analysis of the theoretical bias in dark matter direct detection
• A non-parametric method for measuring the local dark matter density
• The dark matter component of the Gaia radially anisotropic substructure
• Search for Gamma-ray Spectral Lines from Dark Matter Annihilation in Dwarf Galaxies with the High-Altitude Water Cherenkov Observatory
• $\text{galkin}$: a new compilation of the Milky Way rotation curve data
• Selection Rule for Enhanced Dark Matter Annihilation
• Predicting the dark matter velocity distribution in galactic structures: tests against hydrodynamic cosmological simulations
• Implications of the Gaia Sausage for Dark Matter Nuclear Interactions
• Gamma-Ray Dark Matter Searches in Milky Way Satellites -- A Comparative Review of Data Analysis Methods and Current Results
• Making sense of the local Galactic escape speed estimates in direct dark matter searches
• Dark Matter Response to Galaxy Assembly History
• A new dynamically self-consistent version of the Besançon Galaxy Model
• Impact of substructure on local dark matter searches
• The vertical force in the Solar Neighbourhood using red clump stars in TGASxRAVE - Constraints on the local dark matter density
• Dark Matter Model or Mass, but Not Both: Assessing Near-Future Direct Searches with Benchmark-free Forecasting
• Dynamics of the Local Group: the Dwarf Galaxies
• Intermediate mass black holes and dark matter at the Galactic center
• Two-integral distribution functions in axisymmetric galaxies: implications for dark matter searches
• Dark Matter directional detection: comparison of the track direction determination
• Cosmic Gamma Ray Constraints on the Indirect Effects of Dark Matter

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• Dark matter local density determination: recent observations and future prospects
• Weighing the Galactic disk using phase-space spirals II. Most stringent constraints to a thin dark disk using Gaia EDR3
• The Milky Way Revealed by Variable Stars I: Sample Selection of RR Lyrae stars, and Evidence for the Merger History
• Sliding into DM: Determining the local dark matter density and speed distribution using only the local circular speed of the Galaxy
• Classification of gamma-ray targets for velocity-dependent and subhalo-boosted dark-matter annihilation
• Dark Matter Fraction in Disk-Like Galaxies Over the Past 10 Gyr
• Testing the predictions of axisymmetric distribution functions of galactic dark matter with hydrodynamical simulations