Multimessenger constraints on the dark matter interpretation of the Fermi-LAT Galactic center excess

Understand

An excess of $\gamma$ rays in the data measured by the Fermi Large Area Telescope in the direction of the Galactic center has been reported in several publications.

• This excess, labeled as the Galactic center excess (GCE), is detected analyzing the data with different interstellar emission models, point source catalogs and analysis techniques.
• The characteristics of the GCE, recently measured with unprecedented precision, are all compatible with dark matter particles (DM) annihilating in the main halo of our Galaxy, even if other interpretations are still not excluded.
• We investigate the DM candidates that fit the observed GCE spectrum and spatial morphology.