Fermi gamma rays, the WMAP haze, and dark matter

Doug Finkbeiner (Harvard)

The Fermi Gamma-ray Space Telescope has opened a new window on the ~ 10-100 GeV sky. Observations at these energies have confirmed the synchrotron explanation for previous observations of a microwave excess in the inner Galaxy (the "WMAP haze"). The same high energy electrons that produce microwave synchrotron there also inverse Compton scatter starlight photons up to tens of GeV. I will show (for the first time!) our analysis of the latest Fermi data and describe the electron population required to explain it. Possible sources, such as pulsars and WIMP annihilation, will be discussed. I will also show how the CMB power spectrum constrains WIMP models that could explain this emission.