[astroseminar at Sapienza] 13/12/2018 at 16:00: Francis Halzen (Amaldi Research Center Seminar)

[Elia Battistelli]

AMALDI RESEARCH CENTER SEMINAR

Title: IceCube: Opening a New Window on the Universe from the South 
Pole
Speaker: Francis Halzen
Institution: University of Wisconsin – Madison
Date: Thursday, 13 December 2018
Time: 4:00pm
Location: Aula Conversi, Marconi Building, Dept. of Physics, Sapienza 
University

Abstract:
The IceCube project has transformed a cubic kilometer of natural 
Antarctic ice into a neutrino detector. The instrument detects more than 
100,000 neutrinos per year in the GeV to PeV energy range. Among those, 
we have isolated a flux of high-energy neutrinos of cosmic origin. We 
will explore the IceCube telescope and the significance of the discovery 
of cosmic neutrinos. We recently identified their first source: alerted 
by IceCube on September 22, 2017, several astronomical telescopes 
pinpointed a flaring galaxy powered by an active supermassive black 
hole, as the source of a cosmic neutrino with an energy of 290 TeV. Most 
importantly, the large cosmic neutrino flux observed implies that the 
Universe’s energy density in high-energy neutrinos is close to that in 
gamma rays, suggesting that the sources are connected and that a 
multitude of astronomical objects await discovery.

web: https://agenda.infn.it/conferenceDisplay.py?confId=16895
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