Astroparticle Seminar

Constraining Dark Matter models from a Combined Analysis of Dwarf Spheroidal Galaxies with the Fermi Large Area Telescope

Maja Llena-Garde

OKC Stockholm

Dwarf spheroidal galaxies have a large mass to light ratio and low astrophysical background, and are therefore considered one of the most promising targets for dark matter searches in the gamma-ray band. The Fermi-LAT sensitivity to gamma-ray sources can be improved through the use of a joint likelihood analysis, which in the event of a null detection, yields enhanced constraints on dark matter parameter space. From a combined analysis of the Fermi-LAT data for 10 dwarf spheroidal galaxies, we derive robust constraints on the dark matter annihilation cross section for multiple channels accounting for astrophysical uncertainties.