Increased Support for a New Millisecond Pulsar Population in the Galactic Bulge
O. Macias*, M. Pohl, C. Gordon and P. Coleman
February 15, 2023
Almost a decade after its discovery, the Galactic center gamma-ray excess remains puzzling. Although the spectral characteristics of this signal can be explained by either dark matter emission or a new population of millisecond pulsars, the spatial morphology of the excess is the key to separating the two theories. This contribution presents the results of a recent study that uses cutting-edge models for interstellar gas, inverse Compton emission, and stellar mass models to reanalyze the Galactic center excess. A strong correlation is observed between the Fermi GeV excess's spatial morphology and the Galactic bulge stars, supporting the millisecond pulsar hypothesis.
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