Evidence Of Dark Matter Annihilations In The WMAP Haze

Abstract

The WMAP experiment has revealed an excess of microwave emission from the region around the center of our Galaxy. It has been suggested that this signal, known as the ``WMAP Haze'', could be synchrotron emission from relativistic electrons and positrons generated in dark matter annihilations. In this letter, we revisit this possibility. We find that the angular distribution of the WMAP Haze matches the prediction for dark matter annihilations with a cusped density profile, $\rho (r)\propto r^{-1.2}$ in the inner kiloparsecs. Comparing the intensity in different WMAP frequency bands, we find that a wide range of possible WIMP annihilation modes are consistent with the spectrum of the haze for a WIMP with a mass in the 100 GeV to multi-TeV range. Most interestingly, we find that to generate the observed intensity of the haze, the dark matter annihilation cross section is required to be approximately equal to the value needed for a thermal relic, $\sigma v\sim 3\times 10^{-26}$ cm${}^3$/s. No boost factors are required. If dark matter annihilations are in fact responsible for the WMAP Haze, and the slope of the halo profile continues into the inner Galaxy, GLAST is expected to detect gamma rays from the dark matter annihilations in the Galactic Center if the WIMP mass is less than several hundred GeV.

arXiv comment4 pages, 3 figures

References in corpus (19)

• A Universal Density Profile from Hierarchical Clustering
• The Structure of Cold Dark Matter Halos
• Wilkinson Microwave Anisotropy Probe (WMAP) Three Year Results: Implications for Cosmology
• Supersymmetric Dark Matter
• Dark Matter Substructure in Galactic Halos
• Is the Lightest Kaluza-Klein Particle a Viable Dark Matter Candidate?
• Diffuse continuum gamma rays from the Galaxy
• Kaluza-Klein Dark Matter
• Extrapolation of Galactic Dust Emission at 100 Microns to CMBR Frequencies Using FIRAS
• A Full-Sky H-alpha Template for Microwave Foreground Prediction
• Very high energy gamma rays from the direction of Sagittarius A*
• Positron Propagation and Fluxes from Neutralino Annihilation in the Halo
• Microwave ISM Emission Observed by WMAP
• Dark Matter Dynamics and Indirect Detection
• Searching for Dark Matter with Future Cosmic Positron Experiments
• The Role of Antimatter Searches in the Hunt for Supersymmetric Dark Matter
• Diffuse inverse Compton and synchrotron emission from dark matter annihilations in galactic satellites
• Positrons from particle dark-matter annihilation in the Galactic halo: propagation Green's functions
• Challenges in Detecting Gamma-Rays From Dark Matter Annihilations in the Galactic Center

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