Inverse Compton emission from millisecond pulsars in the Galactic bulge

Understand

Analyses of Fermi Gamma-Ray Space Telescope data have revealed a source of excess diffuse gamma rays towards the Galactic center that extends up to roughly $\pm$20 degrees in latitude.

• The leading theory postulates that this GeV excess is the aggregate emission from a large number of faint millisecond pulsars (MSPs).
• The electrons and positrons ($e^\pm$) injected by this population could produce detectable inverse-Compton (IC) emissions by up-scattering ambient photons to gamma-ray energies.
• In this work, we calculate such IC emissions using GALPROP.