Neutrino astronomy: The story so far

• Main Author: Halzen, F.
• Format: Article in Journal/Newspaper
• Language: English
• Published: Societa italiana di fisica 2021
• Subjects: 530 Fisica; Antarctic; Antarc*
• Online Access: http://eprints.bice.rm.cnr.it/21486/; http://eprints.bice.rm.cnr.it/21486/1/ncc12328.pdf; https://www.sif.it/riviste/sif/ncc/econtents/2021/044/06/article/1

The IceCube project transformed a cubic kilometer of transparent natural Antarctic ice into a Cherenkov detector. It discovered PeV-energy neutrinos originating beyond our Galaxy with an energy flux that is comparable to that of GeV-energy gamma rays and EeV-energy cosmic rays. We review the results from IceCube’s first decade of operations: the measurement of the diffuse flux, which has been characterized with multiple techniques, and the search for its sources. We subsequently review the multimessenger data that identified the supermassive black hole TXS 0506+056 as a source of cosmic neutrinos and draw attention to the accumulating indications that cosmic neutrinos are associated with gamma-ray– obscured active galaxies