Characterizing the local gamma-ray Universe via angular
  cross-correlations
  With a decade of gamma-ray data from the Fermi-LAT telescope, we can now hope
to answer how well we know the local Universe at gamma-ray frequencies. On the
other hand, with gamma-ray data alone it is not possible to directly access the
distance of the emission and to point out the origin of unresolved sources.
This obstacle can be overcome by cross-correlating the gamma-ray data with
catalogs of objects with well-determined redshifts and positions. In this work,
we cross-correlate Fermi-LAT skymaps with the 2MPZ catalog to study the local
$z<0.2$ gamma-ray Universe, where about ten percent of the total unresolved
gamma-ray background is produced. We find the signal to be dominated by AGN
emissions, while star forming galaxies provide a subdominant contribution.
Possible hints for a particle DM signal are discussed.
