Cross-Correlation of the Extragalactic Gamma-ray Background with Luminous Red Galaxies

Understand

Measurements of the cross-correlation between the extragalactic gamma-ray background (EGB) and large-scale structure provide a novel probe of dark matter on extragalactic scales.

• We focus on luminous red galaxies (LRGs) as optimal targets to search for the signal of dark matter annihilation.
• We measure the cross-correlation function of the EGB taken from the Fermi Large Area Telescope with the LRGs from the Sloan Digital Sky Survey.
• Statistical errors are calculated using a large set of realistic mock LRG catalogs.