The impact of the phase-space density on the indirect detection of dark matter

Abstract

We study the indirect detection of dark matter when the local dark matter velocity distribution depends upon position, as expected for the Milky Way and its dwarf spheroidal satellites, and the annihilation cross-section is not purely s-wave. Using a phase-space distribution consistent with the dark matter density profile, we present estimates of cosmic and gamma-ray fluxes from dark matter annihilations. The expectations for the indirect detection of dark matter can differ significantly from the usual calculation that assumes that the velocity of the dark matter particles follows a Maxwell-Boltzmann distribution.

34 pages, 18 figures

References in corpus (24)

• Observation of an anomalous positron abundance in the cosmic radiation
• A Theory of Dark Matter
• Dark Matter Results from 225 Live Days of XENON100 Data
• Giant Gamma-ray Bubbles from Fermi-LAT: AGN Activity or Bipolar Galactic Wind?
• New results from DAMA/LIBRA
• Concentration, Spin and Shape of Dark Matter Haloes as a Function of the Cosmological Model: WMAP1, WMAP3 and WMAP5 results
• Cosmology and Astrophysics of Minimal Dark Matter
• A common mass scale for satellite galaxies of the Milky Way
• Results from a Low-Energy Analysis of the CDMS II Germanium Data
• Dark matter and cosmic structure
• A Tentative Gamma-Ray Line from Dark Matter Annihilation at the Fermi Large Area Telescope
• Constraints on WIMP Dark Matter from the High Energy PAMELA $\bar{p}/p$ data
• Gamma-ray and radio tests of the e+e- excess from DM annihilations
• Phase-space structure in the local dark matter distribution and its signature in direct detection experiments
• The Astrophysical Uncertainties Of Dark Matter Direct Detection Experiments
• Inverse Compton constraints on the Dark Matter e+e- excesses
• The Dark Matter at the End of the Galaxy
• Interpreting Dark Matter Direct Detection Independently of the Local Velocity and Density Distribution
• Halo-to-Halo Similarity and Scatter in the Velocity Distribution of Dark Matter
• XENON10/100 dark matter constraints in comparison with CoGeNT and DAMA: examining the Leff dependence
• The PAMELA and ATIC Excesses From a Nearby Clump of Neutralino Dark Matter
• Theories of Dark Energy with Screening Mechanisms
• The Scientific Reach of Multi-Ton Scale Dark Matter Direct Detection Experiments
• A Simple Model for the Density Profiles of Isolated Dark Matter Halos

Cited by in corpus (36)

• Constraints on MACHO Dark Matter from Compact Stellar Systems in Ultra-Faint Dwarf Galaxies
• MadDM v.3.0: a Comprehensive Tool for Dark Matter Studies
• Dark Matter in Dwarf Spheroidal Galaxies and Indirect Detection: A Review
• Anatomy of Eddington-like inversion methods in the context of dark matter searches
• Galactic PeV neutrinos from dark matter annihilation
• Sommerfeld-Enhanced $J$-Factors For Dwarf Spheroidal Galaxies
• Robust cosmic-ray constraints on $p$-wave annihilating MeV dark matter
• On velocity-dependent dark matter annihilations in dwarf satellites
• Effective $J$-factors for Milky Way dwarf spheroidal galaxies with velocity-dependent annihilation
• The Effective J-Factor of the Galactic Center for Velocity-Dependent Dark Matter Annihilation
• Return of the X-rays: A New Hope for Fermionic Dark Matter at the keV Scale
• Bracketing the impact of astrophysical uncertainties on local dark matter searches
• Predicting the dark matter velocity distribution in galactic structures: tests against hydrodynamic cosmological simulations
• Velocity-dependent J-factors for annihilation radiation from cosmological simulations
• Non-abelian Dark Matter Solutions for Galactic Gamma-ray Excess and Perseus 3.5 keV X-ray Line
• $\chi$aro$\nu$: a tool for neutrino flux generation from WIMPs
• Angular distribution of gamma-ray emission from velocity-dependent dark matter annihilation in subhalos
• $J$-factors for self-interacting dark matter in 20 dwarf spheroidal galaxies
• Enhanced Line Signals from Annihilating Kaluza-Klein Dark Matter
• MADHAT: Model-Agnostic Dark Halo Analysis Tool
• Towards a more rigorous treatment of uncertainties on the velocity distribution of dark matter particles for capture in stars
• Indirect Detection of Sub-GeV Dark Matter Coupling to Quarks
• $J$-factors for Velocity-dependent Dark Matter
• Constraints on the Sommerfeld-enhanced dark matter annihilation from the gamma rays of subhalos and dwarf galaxies
• Two-integral distribution functions in axisymmetric galaxies: implications for dark matter searches
• Derivation of the anisotropy profile, constraints on the local velocity dispersion, and implications for direct detection
• Frequency of the dark matter subhalo collisions and bifurcation sequence arising formation of dwarf galaxies
• Velocity-dependent annihilation radiation from dark matter subhalos in cosmological simulations
• Classification of gamma-ray targets for velocity-dependent and subhalo-boosted dark-matter annihilation
• Searching for velocity-dependent dark matter annihilation signals from extragalactic halos
• Constraining Dark Matter Microphysics with the Annihilation Signal from Subhalos
• Velocity-dependent J-factors for Milky Way dwarf spheroidal analogues in cosmological simulations
• Self-interacting Dark Matter with Scalar Dilepton Mediator
• The Velocity-Dependent $J$-factor of the Milky Way Halo: Does What Happens in the Galactic Bulge Stay in the Galactic Bulge?
• Prospects for measuring dark matter microphysics with observations of dwarf spheroidal galaxies
• Testing the predictions of axisymmetric distribution functions of galactic dark matter with hydrodynamical simulations