Dark Matter implications of Fermi-LAT measurement of anisotropies in the diffuse gamma-ray background

Abstract

The detailed origin of the diffuse gamma-ray background is still unknown. However, the contribution of unresolved sources is expected to induce small-scale anisotropies in this emission, which may provide a way to identify and constrain the properties of its contributors. Recent studies have predicted the contributions to the angular power spectrum (APS) from extragalactic and galactic dark matter (DM) annihilation or decay. The Fermi-LAT collaboration reported detection of angular power with a significance larger than $3\sigma$ in the energy range from 1 GeV to 10 GeV on 22 months of data [Ackermann et al. 2012]. For these preliminary results the already published Fermi-LAT APS measurements [Ackermann et al. 2012] are compared to the accurate predictions for DM anisotropies from state-of-the-art cosmological simulations as presented in [Fornasa et al. 2013] to derive constraints on different DM candidates.

2012 Fermi Symposium proceedings - eConf C121028

References in corpus (4)

• The Spectrum of the Isotropic Diffuse Gamma-Ray Emission Derived From First-Year Fermi Large Area Telescope Data
• Galactic Substructure and Dark Matter Annihilation in the Milky Way Halo
• Joint anisotropy and source count constraints on the contribution of blazars to the diffuse gamma-ray background
• Characterization of Dark-Matter-induced anisotropies in the diffuse gamma-ray background

Cited by in corpus (15)

• 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
• The nature of the Diffuse Gamma-Ray Background
• Sensitivity Projections for Dark Matter Searches with the Fermi Large Area Telescope
• Dark matter searches in the gamma-ray extragalactic background via cross-correlations with galaxy catalogues
• 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
• Boosting the annihilation boost: Tidal effects on dark matter subhalos and consistent luminosity modeling
• Particle dark matter searches outside the Local Group
• Power spectrum tomography of dark matter annihilation with local galaxy distribution
• Constraints on dark matter annihilations from diffuse gamma-ray emission in the Galaxy
• Impact of axisymmetric mass models for dwarf spheroidal galaxies on indirect dark matter searches
• Separating astrophysical sources from indirect dark matter signals
• Can galactic dark matter substructure contribute to the cosmic gamma-ray anisotropy?
• Observing small-scale $\gamma$-ray anisotropies with the Cherenkov Telescope Array
• The Dark Matter Contribution to Galactic Diffuse Gamma Ray Emission