Anna Franckowiak

The Spectrum and Morphology of the Fermi Bubbles

The Fermi bubbles are two large structures in the gamma-ray sky extending up to 55 deg above and below the Galactic center. On behalf of the Fermi-LAT collaboration I will present the analysis of 50 months of Fermi-LAT data from 100 MeV to 500 GeV above 10 deg in Galactic latitude to derive the spectrum and morphology of the Fermi bubbles. I will show results on the spectral shape, spatial substructure in the emission, variability of the spectrum as a function of latitude and an estimate of the width of the bubble boundary. I will discuss the modeling of the gamma-ray spectrum with hadronic and leptonic models and the possible relation to the microwave haze.