Warm Dark Matter Constraints Using Milky-Way Satellite Observations and Subhalo Evolution Modeling

Abstract

Warm dark matter (WDM) can potentially explain small-scale observations that currently challenge the cold dark matter (CDM) model, as warm particles suppress structure formation due to free-streaming effects. Observing small-scale matter distribution provides a valuable way to distinguish between CDM and WDM. In this work, we use observations from the Dark Energy Survey and PanSTARRS1, which observe 270 Milky-Way satellites after completeness corrections. We test WDM models by comparing the number of satellites in the Milky Way with predictions derived from the Semi-Analytical SubHalo Inference ModelIng (SASHIMI) code, which we develop based on the extended Press-Schechter formalism and subhalos' tidal evolution prescription. We robustly rule out WDM with masses lighter than 4.4 keV at 95% confidence level for the Milky-Way halo mass of $10^{12}{M}_{\odot }$. The limits are a weak function of the (yet uncertain) Milky-Way halo mass, and vary as $m_{\mathrm{WDM}}>3.6$-$5.1$ keV for $(0.6$-$2.0)\times 10^{12}{M}_{\odot }$. For the sterile neutrinos that form a subclass of WDM, we obtain the constraints of $m_{{\nu }_s}>11.6$ keV for the Milky-Way halo mass of $10^{12}{M}_{\odot }$. These results based on SASHIMI do not rely on any assumptions of galaxy formation physics or are not limited by numerical resolution. The models, therefore, offer a robust and fast way to constrain the WDM models. By applying a satellite forming condition, however, we can rule out the WDM mass lighter than 9.0 keV for the Milky-Way halo mass of $10^{12}{M}_{\odot }$.

14 pages, 8 figures; Comments welcome. v2: Accepted for publication in PRD

References in corpus (24)

• Too big to fail? The puzzling darkness of massive Milky Way subhaloes
• The Cosmic Linear Anisotropy Solving System (CLASS) I: Overview
• Sterile neutrinos, dark matter, and the pulsar velocities in models with a Higgs singlet
• Disruption of Dark Matter Substructure: Fact or Fiction?
• Dark-matter sterile neutrinos in models with a gauge singlet in the Higgs sector
• A mass-dependent density profile for dark matter haloes including the influence of galaxy formation
• Constraints on the Dark Matter Particle Mass from the Number of Milky Way Satellites
• The Population of Dark Matter Subhaloes: Mass Functions and Average Mass Loss Rates
• Discovery of a 3.5 keV line in the Galactic Center and a Critical Look at the Origin of the Line Across Astronomical Targets
• New Constraints on Sterile Neutrino Dark Matter from $NuSTAR$ M31 Observations
• Shaken and Stirred: The Milky Way's Dark Substructures
• Hitomi constraints on the 3.5 keV line in the Perseus galaxy cluster
• A deep search for decaying dark matter with XMM-Newton blank-sky observations
• Joint constraints on thermal relic dark matter from strong gravitational lensing, the Lyman-$\alpha$ forest, and Milky Way satellites
• Constraints on the properties of warm dark matter using the satellite galaxies of the Milky Way
• Satellite Galaxies and Fossil Groups in the Millennium Simulation
• An X-ray Spectroscopic Search for Dark Matter in the Perseus Cluster with Suzaku
• Decaying dark matter search with NuSTAR deep sky observations
• Searches for sterile neutrinos and axionlike particles from the Galactic halo with eROSITA
• Cosmological Implications of Light Sterile Neutrinos produced after the QCD Phase Transition
• 7.1 keV sterile neutrino dark matter constraints from a deep Chandra X-ray observation of the Galactic bulge Limiting Window
• Decaying dark matter in dwarf spheroidal galaxies: Prospects for X-ray and gamma-ray telescopes
• Virial halo mass function in the $Planck$ cosmology
• Statistics of Dark Matter Substructure: I. Model and Universal Fitting Functions

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• Long-Exposure NuSTAR Constraints on Decaying Dark Matter in the Galactic Halo
• Constraining resonant dark matter self-interactions with strong gravitational lenses
• From Images to Dark Matter: End-To-End Inference of Substructure From Hundreds of Strong Gravitational Lenses
• Forecasts for Galaxy Formation and Dark Matter Constraints from Dwarf Galaxy Surveys
• Constraints on dark matter-neutrino scattering from the Milky-Way satellites and subhalo modeling for dark acoustic oscillations
• Post-inflationary axions: a minimal target for axion haloscopes
• Tidal evolution of cored and cuspy dark matter halos
• Warm dark matter from a gravitational freeze-in in extra dimensions
• COZMIC. I. Cosmological Zoom-in Simulations with Initial Conditions Beyond Cold Dark Matter
• Dark matter coupled to radiation: Limits from the Milky Way satellites
• Mixed Warm Dark Matter Constraints using Milky Way Satellite Galaxy Counts
• Impact of bound states on non-thermal dark matter production
• Thermal effects in freeze-in neutrino dark matter production
• Dark Matter Freeze-In and Small-Scale Observables: Novel Mass Bounds and Viable Particle Candidates
• Twin Sterile Neutrino Dark Matter
• Anticipating the XRISM search for the decay of resonantly produced sterile neutrino dark matter
• COZMIC. II. Cosmological Zoom-in Simulations with Fractional non-CDM Initial Conditions
• Generation of neutrino dark matter, baryon asymmetry, and radiation after quintessential inflation
• Using dust to constrain dark matter models
• The Effective Field Theory of Large Scale Structure for Mixed Dark Matter Scenarios
• Detecting Boosted Dark Photons with Gaseous Detectors
• Distinguishing thermal histories of dark matter from structure formation
• Macromodel-free flux-ratio prediction in quadruply imaged quasars with local constraints from lensed arcs
• Searching for Particle Dark Matter with eROSITA Early Data
• WIMP decay as a possible Warm Dark Matter model
• Probabilistic Inference of the Structure and Orbit of Milky Way Satellites with Semi-Analytic Modeling
• Probing non-thermal light DM with structure formation and $N_{\mathrm{eff}}$
• Warm, not Fuzzy: Generalized Ultralight Dark Matter Limits from Milky Way Satellites
• Prompt cusps in hierarchical dark matter halos: Implications for annihilation boost
• Comparison of simulations and semi-analytical model for WDM subhalo mass functions
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