The Mysterious Ultrahigh Energy Cosmic Ray Clustering

Abstract

We examine the correlation between compact radio quasars (redshifts in the range $z=0.3-2.2$) and the arrival direction of ultrahigh energy cosmic rays forming clusters. Our Monte Carlo simulation reveals a statistically significant correlation on the AGASA sample: the chance probability of this effect being less than 1%. The implications of this result on the origin of ultrahigh energy cosmic rays are discussed.

Updates to match journal version

References in corpus (6)

• New constraints from Haverah Park data on the photon and iron fluxes of UHE cosmic rays
• Cluster Analysis of Extremely High Energy Cosmic Rays in the Northern Sky
• GZK Violation - a Tempest in a (Magnetic) Teapot?
• Ultrahigh energy neutrino interactions and weak-scale string theories
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Cited by in corpus (9)

• Astrophysical Origins of Ultrahigh Energy Cosmic Rays
• Ultrahigh Energy Cosmic Rays: The state of the art before the Auger Observatory
• UHECR propagation in the Galaxy: clustering versus isotropy
• The clustering of ultra-high energy cosmic rays and their sources
• Extensive Air Showers from Ultra High Energy Gluinos
• Hints of Energy Dependences in AGASA EHECR Arrival Directions
• Nearby quasar remnants and ultra-high energy cosmic rays
• Anisotropy at the end of the cosmic ray spectrum?
• Physics with Cosmic Neutrinos, PeV to ZeV