Is the Ultra-High Energy Cosmic-Ray Excess Observed by the Telescope Array Correlated with IceCube Neutrinos?

Abstract

The Telescope Array (TA) has observed a statistically significant excess in cosmic-rays with energies above 57 EeV in a region of approximately 1150 square degrees centered on coordinates (R.A. = 146.7, Dec. = 43.2). We note that the location of this excess correlates with two 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 2$\sigma$ 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.

7 pages, 4 figures, accepted for publication in the Astrophysical Journal

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• Open Questions in Cosmic-Ray Research at Ultrahigh Energies
• Ultra-High-Energy Cosmic Rays
• Are both BL Lacs and pulsar wind nebulae the astrophysical counterparts of IceCube neutrino events?
• Can tidal disruption events produce the IceCube neutrinos?
• Connecting blazars with ultra high energy cosmic rays and astrophysical neutrinos
• Analysis of the 4-year IceCube high-energy starting events
• Cosmic Ray Models
• Search for correlations between the arrival directions of IceCube neutrino events and ultrahigh-energy cosmic rays detected by the Pierre Auger Observatory and the Telescope Array
• Tomographic Constraints on High-Energy Neutrinos of Hadronuclear Origin
• A Monte Carlo Bayesian Search for the Plausible Source of the Telescope Array Hotspot
• Neutrino Lighthouse at Sagittarius A*
• Ultra-high-energy-cosmic-ray hot spots from tidal disruption events
• Probing decaying heavy dark matter with the 4-year IceCube HESE data
• Boosted Dark Matter and its implications for the features in IceCube HESE data
• Do high energy astrophysical neutrinos trace star formation?
• Are starburst galaxies a common source of high energy neutrinos and cosmic rays?
• Some possible sources of IceCube TeV-PeV neutrino events
• White paper on EUSO-SPB2
• Angular correlation between IceCube high-energy starting events and starburst sources
• Ultrahigh-Energy Cosmic Ray Composition from the Distribution of Arrival Directions
• Ultrahigh energy cosmic rays from nearby starburst galaxies
• Impact of Galactic magnetic field modelling on searches of point sources via UHECR-Neutrino correlations
• Ultra high energy cosmic rays: the highest energy frontier
• UHECR and GRB neutrinos: an incomplete revolution?
• Ultra high-energy cosmic rays from beyond the Greisen-Zatsepin-Kuz'min horizon