Clustering properties of a sterile neutrino dark matter candidate

Abstract

The clustering properties of sterile neutrinos are studied within an extension of the minimal standard model, where these are produced via the decay of a gauge singlet scalar. The distribution function after decoupling is strongly out of equilibrium. (DM) abundance and phase space density constraints from (dSphs) constrain the mass in the $\mathrm{keV}$ range consistent with a gauge singlet with mass and vacuum expectation value $\sim 100,\mathrm{GeV}$ decoupling at this temperature. The (DM) transfer function and power spectrum are obtained from the solution of the non-relativistic Boltzmann-Vlasov equation in the matter dominated era. The small momentum enhancement of the distribution function leads to long range memory of gravitational clustering and a \emph{substantial enhancement of the power spectrum at small scales compared to a thermal relic or sterile neutrino produced via non-resonant mixing with active neutrinos}. The scale of suppression of the power spectrum for such sterile neutrino with $m\sim \mathrm{keV}$ is $\lambda \sim 488,\mathrm{kpc}$. At large scales $T(k)\sim 1-C,k^2/k_{fs}^2(t_{eq})+...$ with $C\sim \mathrm{O}(1)$. At small scales $65\mathrm{kpc}\lesssim \lambda \lesssim 500\mathrm{kpc}$ corrections to the fluid description and memory of gravitational clustering become important, and we find $T(k)\simeq 1.902e^{-k/k_{fs}(t_{eq})}$, where $k_{fs}(t_{eq})\sim 0.013/\mathrm{kpc}$ is the free streaming wavevector at matter-radiation equality. The enhancement of power at small scales may provide a possible relief to the tension between the constraints from X-ray and Lyman-$\alpha$ forest data.

arXiv commentmatches version to appear in PRD

References in corpus (56)

• Efficient Computation of CMB anisotropies in closed FRW models
• Detection of the Baryon Acoustic Peak in the Large-Scale Correlation Function of SDSS Luminous Red Galaxies
• Dark Matter Substructure in Galactic Halos
• Where are the missing galactic satellites?
• Profiles of dark haloes: evolution, scatter, and environment
• Baryonic Features in the Matter Transfer Function
• Cosmological Perturbation Theory in the Synchronous and Conformal Newtonian Gauges
• Cosmological Perturbation Theory in the Synchronous vs. Conformal Newtonian Gauge
• Sterile Neutrinos as Dark Matter
• Cold collapse and the core catastrophe
• Halo Formation in Warm Dark Matter Models
• Small Scale Cosmological Perturbations: An Analytic Approach
• A New Dark Matter Candidate: Non-thermal Sterile Neutrinos
• The cored distribution of dark matter in spiral galaxies
• Sterile Neutrino Hot, Warm, and Cold Dark Matter
• Density profiles and substructure of dark matter halos: converging results at ultra-high numerical resolution
• Halo Substructure And The Power Spectrum
• The Central Mass Distribution in Dwarf and Low Surface Brightness Galaxies
• The $\nu$MSM, Inflation, and Dark Matter
• Sterile neutrinos, dark matter, and the pulsar velocities in models with a Higgs singlet
• Can sterile neutrinos be the dark matter?
• Dark-matter sterile neutrinos in models with a gauge singlet in the Higgs sector
• Dwarf Galaxy Rotation Curves and the Core Problem of Dark Matter Halos
• Formation and structure of halos in a warm dark matter cosmology
• The Small-Scale Power Spectrum of Cold Dark Matter
• Simulating Observations of Dark Matter Dominated Galaxies: Towards the Optimal Halo Profile
• Gravitational clustering of relic neutrinos and implications for their detection
• Can sterile neutrinos be ruled out as warm dark matter candidates?
• Cusps in CDM halos
• Large Scale Structure Tests of Warm Dark Matter
• Opening a new window for warm dark matter
• How cold is cold dark matter? Small scales constraints from the flux power spectrum of the high-redshift Lyman-alpha forest
• New Dark Matter Physics: Clues from Halo Structure
• Constraints on sterile neutrino as a dark matter candidate from the diffuse X-ray background
• Halo Cores and Phase Space Densities: Observational Constraints on Dark Matter Physics and Structure Formation
• Pulsar kicks from a dark-matter sterile neutrino
• Relic keV sterile neutrinos and reionization
• Production and Evolution of Perturbations of Sterile Neutrino Dark Matter
• Evolution of bias in different cosmological models
• The dwarf galaxy DDO 47 as a dark matter laboratory: testing cusps hiding in triaxial halos
• Direct X-ray Constraints on Sterile Neutrino Warm Dark Matter
• Inflation, cold dark matter, and the central density problem
• Restrictions on parameters of sterile neutrino dark matter from observations of galaxy clusters
• The Observed and Predicted Spatial Distribution of Milky Way Satellite Galaxies
• Constraints on dark matter particles from theory, galaxy observations and N-body simulations
• Neutrino clustering in growing neutrino quintessence
• Bulk QCD Thermodynamics and Sterile Neutrino Dark Matter
• Search for the light dark matter with an X-ray spectrometer
• Small-scale structure formation properties of chilled sterile neutrinos as dark matter
• LambdaCDM Halo Density Profiles: where do actual halos converge to NFW ones?
• Sterile neutrinos
• Precision Cosmology
• The dark matter transfer function: free streaming, particle statistics and memory of gravitational clustering
• Free streaming in mixed dark matter
• Precision Cosmology: Successes and Challenges
• Detecting sterile dark matter in space

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• Constraining Sterile Neutrino Warm Dark Matter with Chandra Observations of the Andromeda Galaxy
• NuSTAR Tests of Sterile-Neutrino Dark Matter: New Galactic Bulge Observations and Combined Impact
• Fermionic warm dark matter produces galaxy cores in the observed scales because of quantum mechanics
• keV Sterile Neutrino Dark Matter from Singlet Scalar Decays: The Most General Case
• Searching for dark matter in X-rays: how not to check the dark matter origin of a spectral feature
• Dark Matter Search Using Chandra Observations of Willman 1, and a Spectral Feature Consistent with a Decay Line of a 5 keV Sterile Neutrino
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• Dark Matter in the minimal Inverse Seesaw mechanism
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• Searches for Long-Lived Particles at the Future FCC-ee
• Small scale aspects of warm dark matter : power spectra and acoustic oscillations
• Dodelson-Widrow Production of Sterile Neutrino Dark Matter with Non-Trivial Initial Abundance
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• Structure of Dark Matter Halos in Warm Dark Matter models and in models with Long-Lived Charged Massive Particles
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• Neutrino Masses and Sterile Neutrino Dark Matter from the PeV Scale
• Constraining FIMP from the structure formation of the Universe: analytic mapping from $m_{\mathrm{WDM}}$
• Non-minimally coupled dark matter: effective pressure and structure formation
• Cosmological Implications of Light Sterile Neutrinos produced after the QCD Phase Transition
• Notes on Hidden Mirror World
• Searching for sterile neutrinos from $\pi$ and $K$ decays
• Cosmological evolution of warm dark matter fluctuations II: Solution from small to large scales and keV sterile neutrinos
• 3.55 keV line in Minimal Decaying Dark Matter scenarios
• Sterile neutrinos produced near the EW scale I: mixing angles, MSW resonances and production rates
• Warm dark matter at small scales: peculiar velocities and phase space density
• Production of heavy sterile neutrinos from vector boson decay at electroweak temperatures
• Snowmass-2013 Cosmic Frontier 3 (CF3) Working Group Summary: Non-WIMP dark matter
• Substructure lensing in galaxy clusters as a constraint on low-mass sterile neutrinos in tensor-vector-scalar theory: The straight arc of Abell 2390
• Cosmological constraints on the velocity-dependent baryon-dark matter coupling
• Higgs sector extension of the neutrino minimal standard model with thermal freeze-in production mechanism
• Roles of sterile neutrinos in particle physics and cosmology
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• Electron events from the scattering with solar neutrinos in the search of keV scale sterile neutrino dark matter
• Unsterile-Active Neutrino Mixing: Consequences on Radiative Decay and Bounds from the X-ray Background
• Freeze-in and freeze-out of sterile neutrino dark matter
• Hollow cores in Warm Dark Matter halos from the Vlasov-Poisson equation
• Fingerprint matching of beyond-WIMP dark matter: neural network approach
• Stochastic dark matter: Covariant Brownian motion from Planckian discreteness
• Charged lepton mixing via heavy sterile neutrinos
• Neutrinos in Astrophysics and Cosmology: Theoretical Advanced Study Institute (TASI) 2020 Lectures
• Cosmological constraints on sterile neutrino Dark Matter production mechanisms