Young and Millisecond Pulsar GeV Gamma-ray Fluxes from the Galactic Center and Beyond

Understand

Gamma-ray observations have shown pulsars to be efficient converters of rotational energy into GeV photons and it is of wide-ranging interest to determine their contribution to the gamma-ray background.

• We arrive at flux predictions from both the young (<~ Myr) and millisecond (~Gyr) Galactic pulsar populations.
• We find that unresolved pulsars can yield both a significant fraction of the excess GeV gamma rays near the Galactic Center and an inverse Compton flux in the inner kpc similar to that inferred by Fermi.
• We compare models of the young pulsar population and millisecond pulsar population to constraints from gamma-ray and radio observations.