Speaker
Description
We perform a search for dark matter (DM) annihilation in nearby galaxies using 413 weeks of publicly-available Fermi Pass 8 gamma-ray data, utilizing a novel method that takes advantage of recently-developed galaxy group catalogs based on the 2MASS Redshift Survey. Having validated our method using N-body simulations, we construct nearly all-sky maps of an expected DM annihilation signal in the local (z < 0.03) universe and look for this structure in the Fermi data, probing theoretically well-motivated regions of parameter space for conservative assumptions about substructure enhancement. I will present the results of our analysis, discussing the effect of modeling uncertainty and implications for the DM interpretation of the Galactic Center excess.
