JPL Home NASA Home Caltech Home
Follow this link to skip to the main content
NASA Logo - Jet Propulsion Laboratory
JPL Home Earth Solar System Stars & Galaxies Technology
Science Visitor and Colloquium Program
Information for Visiting Speakers
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

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

Privacy / Copyrights
  NASA Home Page
Site Manager:

CL 08-3220