Neutrino Events at IceCube and the Fermi Bubbles
Presented by Dr. Lili YANG on 9 Jul 2014 from 14:00 to 14:20
Type: Oral Presentation
Track: Track D1 - Astrophysics
The IceCube Collaboration recently announced twenty-eight events were observed with energies above ~ 30 TeV, more than expected from atmospheric backgrounds. We discuss the detectability of the Fermi Bubbles at IceCube and show that up to 4 − 5 of the 28 events could originate from the Fermi Bubbles (FB). If the observed gamma rays from the FB are created due to the baryonic mechanism, high-energy (> GeV) neutrinos should be emitted as a counterpart. These neutrinos should be detectable as shower or track-like events at a Km3 neutrino detector. For a hard primary cosmic-ray proton spectrum E<sup>-2.1</sup> and cutoff energy at or above 10 PeV, the Fermi Bubble flux substantially exceeds the atmospheric backgrounds. For a steeper spectrum E<sup>-2.3</sup> and/or lower cutoff energy, to observe the neutrino flux at high significance, longer running time will be required.
Cecilia Lunardini, Cecilia.Lunardini@asu.edu, Arizona State University