Observations made by the IceCube Neutrino Observatory at the Amundsen–Scott South Pole Station and confirmed by telescopes around the globe and in Earth’s orbit have for the first time provided evidence for a known blazar as a source of high-energy neutrinos. These results are presented in two papers published this week in the journal Science.
IceCube News Topic: Press Release
In an effort to fill in the blanks of the Standard Model of particle physics, science has been conducting a diligent search for a hypothesized particle known as the “sterile neutrino.” Now, with the latest results from an icy particle detector at the South Pole, scientists are almost certain that there is no such particle.
The National Science Foundation today, March 30, 2016, announced that it has renewed a cooperative agreement with the University of Wisconsin–Madison to operate IceCube. The five-year, $35 million award entails the continued operation and management of the observatory located at NSF’s Amundsen-Scott South Pole Station. In 2013, the IceCube Collaboration reported the first detection of high-energy cosmic neutrinos, opening a new astronomical vista on the universe and on some of its most violent phenomena.
Today, the IceCube Collaboration announces a new observation of high-energy neutrinos that originated beyond our solar system. This study, which looked for neutrinos coming from the Northern Hemisphere, confirms their cosmic origin as well as the presence of extragalactic neutrinos and the intensity of the neutrino rate. The first evidence for astrophysical neutrinos was announced by the collaboration in November 2013. The results published now in ''Physical Review Letters'' are the first independent confirmation of this discovery.
The IceCube project has been awarded the 2013 Breakthrough of the Year by the British magazine Physics World. The Antarctic observatory has been selected for making the first observation of cosmic neutrinos, but also for overcoming the many challenges of creating and operating a colossal detector deep under the ice at the South Pole.
The IceCube Neutrino Observatory is a demonstration of the power of the human passion for discovery, where scientific ingenuity meets technological innovation. Today, nearly 25 years after the pioneering idea of detecting neutrinos in ice, the IceCube Collaboration announces the observation of 28 very high-energy particle events that constitute the first solid evidence for astrophysical neutrinos from cosmic accelerators. Details of the research appear in an article published tomorrow, November 22, in Science.
Although cosmic rays were discovered 100 years ago, their origin remains one of the most enduring mysteries in physics. Now, the IceCube Neutrino Observatory, a massive detector in Antarctica, is honing in on how the highest energy cosmic rays are produced.
A paper from the IceCube Collaboration in Physical Review Letters (PRL 106,141101 (2011)) was selected as a research highlight in the journal Nature Physics. The analysis presented in the paper tested a model of gamma-ray bursts (GRBs) with IceCube data from 2008-2009. The analysis showed that IceCube did not observe the high-energy neutrino flux predicted by the model. This is the first time IceCube data successfully constrained a model of cosmic ray acceleration in astrophysical sources. (arXiv: 1101.1448)