Speaker
Description
The IceCube Neutrino Observatory has observed a diffuse flux of astrophysical neutrinos of so far unknown origin. The absence of strong individual neutrino sources suggests an extragalactic population of dim sources. Although individual neutrino sources may be faint, the population may trace the underlying large scale matter distribution. In this work, we present a search for the origin of astrophysical neutrinos using the two-point cross correlation, a widely used method in cosmology for characterizing correlations between source catalogs. We perform a cross-correlation of more than 10 years of track-like events from IceCube with a galaxy catalog derived from the WISE and 2MASS data that identifies more than 1.2 million nearby galaxies with redshift less than z<0.4. The cross-correlation has the potential to constrain emission of neutrinos from the local universe and possibly provide evidence for the origin of the diffuse neutrino population.
