Supersymmetric Dark Matter and the Extragalactic Gamma Ray Background

Abstract

We trace the origin of the newly determined extragalactic gamma ray background from EGRET data to an unresolved population of blazars and neutralino annihilation in cold dark matter halos. Using results of high-resolution simulations of cosmic structure formation, we calculate composite spectra and compare with the EGRET data. The resulting best-fit value for the neutralino mass is m_chi = (515 +/- 110/75) GeV (systematic errors \~30%).

arXiv comment4 pages, 3 figures; accepted by Physical Review Letters; replaced with accepted version

References in corpus (30)

• A Universal Density Profile from Hierarchical Clustering
• The Structure of Cold Dark Matter Halos
• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Preliminary Maps and Basic Results
• Supersymmetric Dark Matter
• Resolving the Structure of Cold Dark Matter Halos
• EGRET Observations of the Extragalactic Gamma Ray Emission
• The Power Spectrum Dependence of Dark Matter Halo Concentrations
• MeV Dark Matter: Has It Been Detected?
• Earth-mass dark-matter haloes as the first structures in the early Universe
• Implications of Cosmological Gamma-Ray Absorption II. Modification of gamma-ray spectra
• Cosmological dark matter annihilations into gamma-rays - a closer look
• A new determination of the extragalactic diffuse gamma-ray background from EGRET data
• The Power Spectrum of Mass Fluctuations Measured from the Lyman-alpha Forest at Redshift z=2.5
• Spectral Gamma-ray Signatures of Cosmological Dark Matter Annihilation
• Absorption of High Energy Gamma Rays by Interactions With Starlight Photons in Extragalactic Space at High Redshifts and the High Energy Gamma-Ray Background
• The Gamma-Ray Background from Blazars: A New Look
• Updated Post-WMAP Benchmarks for Supersymmetry
• Chandra Observations of Abell 2029: The Dark Matter Profile Down to <0.01 R_vir in an Unusually Relaxed Cluster
• The Clumpiness of Cold Dark Matter: Implications for the Annihilation Signal
• Astrophysical inputs on the SUSY dark matter annihilation detectability
• Detection of Neutralino Annihilation Photons from External Galaxies
• Evidence for a Galactic gamma ray halo
• Measurement of Low-Energy Cosmic-Ray Antiprotons at Solar Minimum
• Can Dark Matter Annihilation Dominate the Extragalactic Gamma-Ray Background?
• Multi-wavelength Observations of 3C 273 in 1993-1995
• Indirect, Direct and Collider Detection of Neutralino Dark Matter
• The gamma ray background from large scale structure formation
• Extragalactic Sources of TeV Gamma Rays: A Summary
• Cosmological gamma ray and neutrino backgrounds due to neutralino dark matter annihilation
• Gamma-Ray Bursts, Ultra High Energy Cosmic Rays, and Cosmic Gamma-Ray Background

Cited by in corpus (54)

• The Large Area Telescope on the Fermi Gamma-ray Space Telescope Mission
• Gravitino Dark Matter in R-Parity Breaking Vacua
• Mass Deficits, Stalling Radii, and the Merger Histories of Elliptical Galaxies
• Constraints on Cosmological Dark Matter Annihilation from the Fermi-LAT Isotropic Diffuse Gamma-Ray Measurement
• Observation of Gamma Rays from the Galactic Center with the MAGIC Telescope
• Neutrino Constraints on the Dark Matter Total Annihilation Cross Section
• Pre-launch estimates for GLAST sensitivity to Dark Matter annihilation signals
• The Starburst Contribution to the Extra-Galactic Gamma-Ray Background
• Anisotropy of the cosmic gamma-ray background from dark matter annihilation
• The nature of the Diffuse Gamma-Ray Background
• Constraining Very Heavy Dark Matter Using Diffuse Backgrounds of Neutrinos and Cascaded Gamma Rays
• Prospects of detecting gamma-ray emission from galaxy clusters: cosmic rays and dark matter annihilations
• 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
• Dark Matter and Gamma-Rays From Draco: MAGIC, GLAST and CACTUS
• Revealing dark matter substructure with anisotropies in the diffuse gamma-ray background
• Gamma-ray background anisotropy from galactic dark matter substructure
• Upper Limits on the VHE gamma-ray Emission from the Willman 1 Satellite Galaxy with the MAGIC telescope
• Extragalactic gamma-ray background radiation from dark matter annihilation
• Angular Signatures of Annihilating Dark Matter in the Cosmic Gamma-Ray Background
• TASI 2008 Lectures on Dark Matter
• Ultra-High Energy Cosmic Rays and the GeV-TeV Diffuse Gamma-Ray Flux
• Fermi Gamma-ray Space Telescope: High-Energy Results from the First Year
• Adiabatic compression and indirect detection of supersymmetric dark matter
• The Contribution Of Inverse Compton Scattering To The Diffuse Extragalactic Gamma-Ray Background From Annihilating Dark Matter
• The Signature of Large Scale Structures on the Very High Energy Gamma-Ray Sky
• The cosmic X-ray and gamma-ray background from dark matter annihilation
• Gamma-Ray Background from Neutralino Annihilation in the First Cosmological Objects
• Angular correlations in the cosmic gamma-ray background from dark matter annihilation around intermediate-mass black holes
• Constraints on ultracompact minihalos from extragalactic γ-ray background
• Dark Matter and the CACTUS Gamma-Ray Excess from Draco
• Dark Matter Signatures in the Anisotropic Radio Sky
• Identifying Dark Matter Annihilation Products In The Diffuse Gamma Ray Background
• Angular Signatures of Dark Matter in the Diffuse Gamma Ray Background
• Dark matter annihilation from intermediate-mass black holes: Contribution to the extragalactic gamma-ray background
• EGRET Excess of diffuse Galactic Gamma Rays interpreted as a Signal of Dark Matter Annihilation
• Impact of astrophysical processes on the gamma-ray background from dark matter annihilations
• Evidence for Dark Matter Annihilation from Galactic Gamma Rays?
• Collider, direct and indirect detection of supersymmetric dark matter
• The detectability of dark matter annihilation with Fermi using the anisotropy energy spectrum of the gamma-ray background
• Excess of EGRET Galactic Gamma Ray Data interpreted as Dark Matter Annihilation
• The Doppler effect on indirect detection of dark matter using dark matter only simulations
• Gamma-ray detection from neutralino annihilation in non--universal SUGRA scenarios
• Dark Matter Searches
• Status and perspectives of indirect and direct dark matter searches
• Constraints on dark matter annihilation from M87: Signatures of prompt and inverse-Compton gamma rays
• Astrophysics in 2005
• A new Determination of the Extragalactic Background of Diffuse Gamma Rays taking into account Dark Matter Annihilation
• Smallest Halos in Thermal Wino Dark Matter
• Antimatter and Gamma-rays from Dark Matter Annihilation
• Indirect Dark Matter Signals
• SUSY: Theory Status in the Light of Experimental Constraints
• A New Approach to Searching for Dark Matter Signals in Fermi-LAT Gamma Rays
• Perspective of Galactic dark matter subhalo detection on Fermi from the EGRET observation