IceCube Neutrino Events from Fermi Bubbles
Abstract
The IceCube Neutrino Observatory announced thirty-seven candidate events observed with deposited energies above 30 TeV with three-year dataset, more than expected from atmospheric backgrounds. We discuss the detectability of the Fermi Bubbles (FB) by IceCube and show that up to 6 -- 7 of the 37 events could originate from the FB. If the observed gamma rays from the FB are created due to 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 Km neutrino detector. For a hard primary cosmic-ray proton spectrum, , and cutoff energy at or above 10 PeV, the FB flux substantially exceeds the atmospheric backgrounds. For a steeper spectrum, , and/or lower cutoff energy, detection with high significance will require a longer running time.
Cite
@article{arxiv.1412.6240,
title = {IceCube Neutrino Events from Fermi Bubbles},
author = {Cecilia Lunardini and Soebur Razzaque and Lili Yang},
journal= {arXiv preprint arXiv:1412.6240},
year = {2014}
}
Comments
7pages, 6 figures. To appear in the proceedings of the 59th annual conference of the South African Institute of Physics, 7-11 July 2014