Speaker
Francis Halzen
(University of Wisconsin- Madison)
Description
IceCube detects more than 100,000 neutrinos per year in the GeV to 10 PeV energy range. Among those, we have isolated a flux of high-energy neutrinos of cosmic origin, with an energy densityin the extreme universe similar to that of high-energy photons and cosmic rays.We identified their first source:on September 22, 2017, following an IceCubeneutrino alert, observations by other astronomical telescopes pinpointed a flaring active galaxy, powered by a supermassive black hole, as the source of a cosmic neutrino with an energy of 290 TeV. We will review recent progress in measuring the cosmic neutrino spectrum and in identifying its origin.
Author
Francis Halzen
(University of Wisconsin- Madison)
