Constraints on the annihilation cross section of dark matter particles from anisotropies in the diffuse gamma-ray background measured with Fermi-LAT

Abstract

Annihilation of dark matter particles in cosmological halos (including a halo of the Milky Way) contributes to the diffuse gamma-ray background (DGRB). As this contribution will appear anisotropic in the sky, one can use the angular power spectrum of anisotropies in DGRB to constrain properties of dark matter particles. By comparing the updated analytic model of the angular power spectrum of DGRB from dark matter annihilation with the power spectrum recently measured from the 22-month data of Fermi Large Area Telescope (LAT), we place upper limits on the annihilation cross section of dark matter particles as a function of dark matter masses. We find that the current data exclude <σv> >~ 10^{-25} cm^3 s^{-1} for annihilation into b\bar{b} at the dark matter mass of 10 GeV, which is a factor of three times larger than the canonical cross section. The limits are weaker for larger dark matter masses. The limits can be improved further with more Fermi-LAT data as well as by using the power spectrum at lower multipoles (l <~ 150), which are currently not used due to a potential Galactic foreground contamination.

13 pages, 18 figures, comments welcome

References in corpus (23)

• Precise Relic WIMP Abundance and its Impact on Searches for Dark Matter Annihilation
• Constraining Dark Matter Models from a Combined Analysis of Milky Way Satellites with the Fermi Large Area Telescope
• The Spectrum of the Isotropic Diffuse Gamma-Ray Emission Derived From First-Year Fermi Large Area Telescope Data
• Exclusion of canonical WIMPs by the joint analysis of Milky Way dwarfs with Fermi
• The Luminosity Function of Fermi-detected Flat-Spectrum Radio Quasars
• What mass are the smallest protohalos?
• The Fermi-LAT high-latitude Survey: Source Count Distributions and the Origin of the Extragalactic Diffuse Background
• Early supersymmetric cold dark matter substructure
• Dark Matter Annihilation in Substructures Revised
• Anisotropies in the diffuse gamma-ray background measured by the Fermi LAT
• Dark matter annihilation or unresolved astrophysical sources? Anisotropy probe of the origin of cosmic gamma-ray background
• Cosmic Gamma-Ray Background from Star-Forming Galaxies
• Constraining Extended Gamma-ray Emission from Galaxy Clusters
• Fermi-LAT constraints on dark matter annihilation cross section from observations of the Fornax cluster
• Evidence for extended gamma-ray emission from galaxy clusters
• Joint anisotropy and source count constraints on the contribution of blazars to the diffuse gamma-ray background
• Anisotropy probe of galactic and extra-galactic Dark Matter annihilations
• Can Dark Matter Annihilation Dominate the Extragalactic Gamma-Ray Background?
• The Gamma-Ray-Flux Probability Distribution Function from Galactic Halo Substructure
• Contribution from Star-Forming Galaxies to the Cosmic Gamma-Ray Background Radiation
• Angular Signatures of Annihilating Dark Matter in the Cosmic Gamma-Ray Background
• Angular power spectrum of gamma-ray sources for GLAST: blazars and clusters of galaxies
• Angular Anisotropies in the Cosmic Gamma-ray Background as a Probe of its Origin

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• A review of indirect searches for particle dark matter
• Limits on Dark Matter Annihilation Signals from the Fermi LAT 4-year Measurement of the Isotropic Gamma-Ray Background
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• Constraints on decaying dark matter from the extragalactic gamma-ray background
• Modeling evolution of dark matter substructure and annihilation boost
• Indirect dark matter searches in Gamma- and Cosmic Rays
• Indirect Detection Analysis: Wino Dark Matter Case Study
• CLUMPY: Jeans analysis, $\gamma$-ray and neutrino fluxes from dark matter (sub-)structures
• High-energy gamma-ray and neutrino backgrounds from clusters of galaxies and radio constraints
• Cross-Correlation of Cosmic Shear and Extragalactic Gamma-ray Background: Constraints on the Dark Matter Annihilation Cross-Section
• Tomography of the Fermi-LAT gamma-ray diffuse extragalactic signal via cross-correlations with galaxy catalogs
• CLUMPY v3: $\gamma$-ray and $\nu$ signals from dark matter at all scales
• Dark matter searches in the gamma-ray extragalactic background via cross-correlations with galaxy catalogues
• A Search for Dark Matter Annihilation in Galaxy Groups
• The angular power spectrum of the diffuse gamma-ray emission as measured by the Fermi Large Area Telescope and constraints on its Dark Matter interpretation
• Particle dark matter searches in the anisotropic sky
• Boosting the annihilation boost: Tidal effects on dark matter subhalos and consistent luminosity modeling
• Mapping dark matter in the gamma-ray sky with galaxy catalogs
• Particle dark matter searches outside the Local Group
• Dark matter substructure modelling and sensitivity of the Cherenkov Telescope Array to Galactic dark halos
• Cosmic infrared background excess from axion-like particles and implications for multi-messenger observations of blazars
• Tomographic-spectral approach for dark matter detection in the cross-correlation between cosmic shear and diffuse gamma-ray emission
• Mapping Extragalactic Dark Matter Annihilation with Galaxy Surveys: A Systematic Study of Stacked Group Searches
• Annihilating Asymmetric Dark Matter
• Dissecting the Gamma-Ray Background in Search of Dark Matter
• Power spectrum tomography of dark matter annihilation with local galaxy distribution
• Cross-correlation of weak lensing and gamma rays: implications for the nature of dark matter
• Confronting Galactic and Extragalactic $\gamma$-ray observed by Fermi-LAT with Annihilating Dark Matter in Inert Higgs Doublet Model
• Impact of axisymmetric mass models for dwarf spheroidal galaxies on indirect dark matter searches
• The Mutual Interaction Between Population III Stars and Self-Annihilating Dark Matter
• $Z^{\prime }$ portal to Chern-Simons Dark Matter
• Cross-Correlation of the Extragalactic Gamma-ray Background with Luminous Red Galaxies
• The role of the eROSITA all-sky survey in searches for sterile neutrino dark matter
• Tomographic imaging of the Fermi-LAT gamma-ray sky through cross-correlations: A wider and deeper look
• Probing the Cosmic X-ray and MeV Gamma-ray Background Radiation through the Anisotropy
• Characterizing the local gamma-ray Universe via angular cross-correlations
• Constraints on MeV dark matter using neutrino detectors and their implication for the 21-cm results
• Separating astrophysical sources from indirect dark matter signals
• Angular Power Spectra with Finite Counts
• The clustering of baryonic matter. I: a halo-model approach
• Planck Lensing and Cosmic Infrared Background Cross-Correlation with Fermi-LAT: Tracing Dark Matter Signals in the Gamma-Ray Background
• Astrophysical interpretation of the anisotropies in the unresolved gamma-ray background
• Gamma-ray anisotropies from dark matter in the Milky Way: the role of the radial distribution
• Diffuse Gamma Ray Background from Annihilating Dark Matter in Density Spikes around Supermassive Black Holes
• Measurement of redshift dependent cross correlation of HSC clusters and Fermi $\gamma$ rays
• Extragalactic diffuse gamma-rays from dark matter annihilation: revised prediction and full modelling uncertainties
• The Anisotropy of the Extragalactic Radio Background from Dark Matter Annihilation
• Isotropic extragalactic flux from dark matter annihilations: lessons from interacting dark matter scenarios
• Dark matter indirect detection signals and the nature of neutrinos in the supersymmetric $U(1{)}_{B-L}$ extension of the standard model
• Harnessing the Population Statistics of Subhalos to Search for Annihilating Dark Matter
• Constraints on dark matter and astrophysics from tomographic $\gamma$-ray cross-correlations
• Can galactic dark matter substructure contribute to the cosmic gamma-ray anisotropy?
• Observing small-scale $\gamma$-ray anisotropies with the Cherenkov Telescope Array
• Searching for dark matter subhalos in the Fermi-LAT catalog with Bayesian neural networks
• Dark Matter phenomenology : from simplified WIMP models to refined alternative solutions
• The Galactic Isotropic $\gamma$-ray Background and Implications for Dark Matter
• LHAASO Galactic Plane $\gamma$-rays Strongly Constrain Heavy Dark Matter
• Dark Matter and Galaxy Cross-Correlations with the Cherenkov Telescope Array Observatory
• Prompt cusps in hierarchical dark matter halos: Implications for annihilation boost
• Extragalactic Searches for Dark Matter Annihilation