After more than a decade since its discovery, the Galactic center gamma-ray excess - discovered with the Fermi Large Area Telescope - remains puzzling. While the spectrum of the signal can be explained by either dark matter or an unresolved population of millisecond pulsars, the spatial morphology of this excess seems to hold the key to separate the two theories. In this contribution, we present the results of a recent study in which we use bleeding edge models for interstellar gas, inverse Compton emission, and stellar mass models to reanalyze the Galactic center excess. We find that the spatial morphology of the excess is highly correlated with stellar matter in the Galactic bulge, providing strong support for the millisecond pulsar hypothesis.
Authors / Affiliations: mappings to Contributors and OrganizationsSee all Organizations.
- 1 2 Oscar Macias,
- 3 4 Martin Pohl,
- 5 Chris Gordon,
- 5 Phaedra Coleman
- 1 Universiteit van Amsterdam / University of Amsterdam [UvA]
- 2 Gravitational and Astroparticle Physics Amsterdam [GRAPPA]
- 3 Deutsches Elektronen-Synchrotron / Deutsche Elektronen-Synchrotron DESY [DESY]
- 4 Universität Potsdam / University of Potsdam [UPC]
- 5 Te Whare Wānanga o Waitaha / University of Canterbury