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Astrophysics Luncheon Seminar

Shedding Light on Dark Matter and Astrophysical Sources with Gamma-ray Anisotropy
Presented by Jennifer Siegal-Gaskins
California Institute of Technology

Monday, September 30, 2013
12:00 noon in 169-336

Abstract
Gamma rays probe the most energetic processes in the universe and are a promising tool to search for signatures of new physics. One current mystery in high-energy astrophysics is the origin of the diffuse gamma-ray background. The contribution of undetected sources is expected to induce small-scale anisotropies in this emission, and these may provide a means of identifying and constraining the properties of its contributors. I will review the results of the first anisotropy analysis of the diffuse gamma-ray background measured by the Fermi Large Area Telescope, and highlight the new constraints this measurement has placed on high-energy source populations, focusing on implications for blazar population models and for a signal from the annihilation or decay of dark matter particles. I will also present new multi-wavelength techniques for unraveling contributors to diffuse emission.

About the Speaker
Jennifer Siegal-Gaskins is an Einstein Postdoctoral Fellow at the California Institute of Technology.


SVCP Astrophysics


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