TAPIR Seminar
Friday, October 9, 2:00pm, 370 Cahill

Jennifer Siegal-Gaskins, Ohio State University

"Using anisotropy to identify a dark matter signal in diffuse gamma-ray emission with Fermi"

Dark matter annihilation in Galactic substructure will produce diffuse gamma-ray emission of remarkably
constant intensity across the sky, making it difficult to disentangle this Galactic dark matter signal from the
extragalactic gamma-ray background. Recent studies have considered the angular power spectrum of the
diffuse emission from various extragalactic source classes and from Galactic dark matter. I'll discuss these
results and show how the energy dependence of anisotropies in the total measured diffuse emission could
be used to confidently identify a signal from dark matter in Fermi data. Finally, I'll present new results
demonstrating that anisotropy analysis could significantly extend the sensitivity of current indirect dark
matter searches.