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IS THE ULTRA-HIGH ENERGY COSMIC-RAY EXCESS OBSERVED BY THE TELESCOPE ARRAY CORRELATED WITH ICECUBE NEUTRINOS?

2014; IOP Publishing; Volume: 794; Issue: 2 Linguagem: Inglês

10.1088/0004-637x/794/2/126

1538-4357

Ke Fang, Toshihiro Fujii, Tim Linden, Angela V. Olinto,

Neutrino Physics Research

The Telescope Array (TA) has observed a statistically significant excess in cosmic rays with energies above 57 EeV in a region of approximately 1150 deg2 centered on coordinates R.A. = 146.7, decl. = 43.2. We note that the location of this excess correlates with 2 of the 28 extraterrestrial neutrinos recently observed by IceCube. The overlap between the two IceCube neutrinos and the TA excess is statistically significant at the 2σ level. Furthermore, the spectrum and intensity of the IceCube neutrinos is consistent with a single source which would also produce the TA excess. Finally, we discuss possible source classes with the correct characteristics to explain the cosmic-ray and neutrino fluxes with a single source.